MUSCULAR
Sure! Here is a 75-item multiple-choice exam covering the content provided, with answers included:
1. What is the most abundant tissue in the body?
- A) Connective tissue
- B) Muscle tissue
- C) Nervous tissue
- D) Epithelial tissue
- Answer: B
2. Which muscle type is responsible for voluntary movement?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
3. Which of the following is NOT a function of the muscular system?
- A) Body movement
- B) Maintenance of posture
- C) Production of blood cells
- D) Respiration
- Answer: C
4. What type of muscle is responsible for the heart beating?
- A) Skeletal muscle
- B) Smooth muscle
- C) Cardiac muscle
- D) All of the above
- Answer: C
5. What is the connective tissue sheath surrounding each skeletal muscle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcomere
- Answer: A
6. Which structure is the basic functional unit of skeletal muscle?
- A) Myofibril
- B) Sarcomere
- C) Myosin
- D) Actin
- Answer: B
7. What characteristic allows skeletal muscle to return to its original resting length after being stretched?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: D
8. What type of contraction causes heat production in the body?
- A) Cardiac muscle contraction
- B) Smooth muscle contraction
- C) Skeletal muscle contraction
- D) None of the above
- Answer: C
9. Which type of muscle contraction is involved in propelling food in the digestive tract?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
10. Where are intercalated disks found?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) All of the above
- Answer: B
11. What structure extends from one Z disk to another Z disk?
- A) Myofibril
- B) Sarcomere
- C) Myosin
- D) Actin
- Answer: B
12. Which molecule provides a calcium binding site on actin myofilaments?
- A) Tropomyosin
- B) Troponin
- C) Myosin
- D) Actin
- Answer: B
13. What is the term for the most stationary end of a muscle?
- A) Origin
- B) Insertion
- C) Belly
- D) Aponeurosis
- Answer: A
14. Which muscle type is under voluntary control?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) None of the above
- Answer: C
15. What type of muscle has gap junctions to allow action potentials to spread?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) All of the above
- Answer: C
16. Which type of muscle has striations but is not as distinctly striated as skeletal muscle?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) All of the above
- Answer: B
17. What is the function of the retinaculum?
- A) Attaching muscle to bone
- B) Holding down tendons at the wrist and ankle
- C) Connecting muscle fibers
- D) Providing a calcium binding site
- Answer: B
18. What term describes a muscle acting in opposition to an agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: C
19. Which muscle flexes the elbow?
- A) Triceps brachii
- B) Biceps brachii
- C) Deltoid
- D) Pectoralis major
- Answer: B
20. What condition is characterized by painful, spastic contractions of muscle?
- A) Myasthenia gravis
- B) Tendinitis
- C) Cramps
- D) Fibromyalgia
- Answer: C
21. What is the main symptom of fibromyalgia?
- A) Muscle weakness
- B) Muscle pain
- C) Muscle atrophy
- D) Muscle hypertrophy
- Answer: B
22. What is the result of an increase in the number of myofibrils within muscle fibers?
- A) Muscle atrophy
- B) Muscle hypertrophy
- C) Muscle relaxation
- D) Muscle spasm
- Answer: B
23. What disorder is characterized by the failure of muscles to relax following a forceful contraction?
- A) Myotonic muscular dystrophy
- B) Myasthenia gravis
- C) Tendinitis
- D) Fibromyalgia
- Answer: A
24. What type of muscle contraction does not develop an oxygen debt?
- A) Skeletal muscle contraction
- B) Cardiac muscle contraction
- C) Smooth muscle contraction
- D) All of the above
- Answer: C
25. What type of drugs are used to treat myasthenia gravis?
- A) Anti-inflammatory drugs
- B) Immunosuppressive drugs
- C) Anti-cholinesterase drugs
- D) Muscle relaxants
- Answer: C
26. What is the term for inflammation of tendon attachment points?
- A) Tendinitis
- B) Myasthenia gravis
- C) Myotonic muscular dystrophy
- D) Fibromyalgia
- Answer: A
27. What is the name for a broad, sheet-like tendon?
- A) Fascia
- B) Retinaculum
- C) Aponeurosis
- D) Epimysium
- Answer: C
28. What does the term "striated" refer to in muscle tissue?
- A) Muscle fibers are spindle-shaped
- B) Muscle fibers have transverse bands
- C) Muscle fibers are connected by gap junctions
- D) Muscle fibers contract slowly
- Answer: B
29. What type of muscle fibers are organized into sarcomeres?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) Both A and C
- Answer: D
30. What muscle characteristic allows it to respond to a stimulus?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: B
31. What is the term for the ability of skeletal muscle to shorten with force?
- A) Extensibility
- B) Elasticity
- C) Contractility
- D) Excitability
- Answer: C
32. Which muscle type is responsible for peristalsis in the digestive tract?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
33. Which type of muscle contraction can lead to hypertrophy?
- A) Involuntary contraction
- B) Voluntary contraction
- C) Cardiac contraction
- D) Smooth muscle contraction
- Answer: B
34. What is the connective tissue surrounding individual muscle fibers called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: C
35. What structure is involved in muscle contraction and is composed of actin and myosin?
- A) Sarcomere
- B) Myofibril
- C) Myofilament
- D) All of the above
- Answer: D
36. Which muscle is the agonist in elbow extension?
- A) Biceps brachii
- B) Triceps brachii
- C) Deltoid
- D) Pectoralis major
- Answer: B
37. What term describes the decrease in muscle size due to a decrease in myofilaments within muscle fibers?
- A) Hypertrophy
- B) Atrophy
- C) Fibromyalgia
- D) Myasthenia gravis
- Answer: B
38. Which structure in cardiac muscle cells allows for action potential conduction between cells?
- A) Sarcomere
- B) Myofibril
- C) Intercalated disks
- D) Z disk
- Answer: C
39. Which of the following is NOT a characteristic of smooth muscle cells?
- A) Spindle-shaped
- B) Striated
- C) One nucleus per cell
- D) Less actin and myosin than skeletal muscle
- Answer: B
40. Which type of muscle is involved in all aspects of communication, such as speaking and writing?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
41. What is the term for the connective tissue that surrounds a muscle fascicle?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: B
42. Which muscle type is influenced by hormones such as epinephrine?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) Both A and B
- Answer: D
43. Which of the following conditions involves chronic muscle pain syndrome?
- A) Myasthenia gravis
- B) Fibromyalgia
- C) Myotonic muscular dystrophy
- D) Tendinitis
- Answer: B
44. What type of connective tissue holds down tendons at each wrist and ankle?
- A) Epimysium
- B) Retinaculum
- C) Aponeurosis
- D) Perimysium
- Answer: B
45. What is the cytoplasm of a muscle fiber called?
- A) Sarcolemma
- B) Sarcoplasm
- C) Myoplasm
- D) Myofibril
- Answer: B
46. Which of the following conditions is characterized by muscle atrophy due to nerve damage or casting?
- A) Myasthenia gravis
- B) Fibromyalgia
- C) Hypertrophy
- D) Atrophy
- Answer: D
47. What is the term for the band of connective tissue that holds down tendons at the wrist and ankle?
- A) Fascia
- B) Retinaculum
- C) Aponeurosis
- D) Tendon
- Answer: B
48. What type of muscle fibers are not organized into sarcomeres?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
49. What is the condition called when the muscle has no tone due to severed nerve supply?
- A) Flaccid
- B) Hypertrophy
- C) Atrophy
- D) Fibromyalgia
- Answer: A
50. Which structure is attached to the Z disk?
- A) Actin myofilaments
- B) Myosin myofilaments
- C) Troponin
- D) Tropomyosin
- Answer: A
51. What term describes a muscle that accomplishes a certain movement?
- A) Agonist
- B) Antagonist
- C) Synergist
- D) Prime mover
- Answer: A
52. Which type of muscle contraction is under involuntary control?
- A) Skeletal muscle contraction
- B) Smooth muscle contraction
- C) Cardiac muscle contraction
- D) Both B and C
- Answer: D
53. What is the main characteristic of myasthenia gravis?
- A) Muscle hypertrophy
- B) Muscle atrophy
- C) Destruction of acetylcholine receptors
- D) Inflammation of tendons
- Answer: C
54. What muscle characteristic allows it to be stretched to its normal resting length and beyond?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: C
55. What is the smallest functional unit of skeletal muscle capable of contracting?
- A) Myofibril
- B) Sarcomere
- C) Myofilament
- D) Sarcolemma
- Answer: B
56. Which muscle type is responsible for maintaining posture?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
57. Which of the following structures is composed of actin and myosin myofilaments?
- A) Sarcomere
- B) Myofibril
- C) Muscle fiber
- D) All of the above
- Answer: D
58. Which condition involves chronic progressive autoimmune disease affecting acetylcholine receptors?
- A) Myasthenia gravis
- B) Myotonic muscular dystrophy
- C) Fibromyalgia
- D) Tendinitis
- Answer: A
59. What type of muscle is involved in heart contraction?
- A) Skeletal muscle
- B) Smooth muscle
- C) Cardiac muscle
- D) None of the above
- Answer: C
60. Which structure forms an attachment site for actin myofilaments?
- A) Myosin myofilaments
- B) Sarcomere
- C) Z disk
- D) Troponin
- Answer: C
61. What is the term for the muscle attachment point that undergoes the greatest movement?
- A) Origin
- B) Insertion
- C) Belly
- D) Aponeurosis
- Answer: B
62. What characteristic of cardiac muscle allows it to function as a unit?
- A) Sarcomeres
- B) Striations
- C) Intercalated disks
- D) Spindle shape
- Answer: C
63. Which of the following describes a muscle that acts in opposition to an agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: C
64. What is the connective tissue surrounding a muscle fascicle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: B
65. What condition results from the buildup of lactic acid causing muscle pain?
- A) Myasthenia gravis
- B) Tendinitis
- C) Cramps
- D) Fibromyalgia
- Answer: C
66. What term describes a muscle that accomplishes the same movement as the agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: B
67. Which muscle type has a single nucleus per cell and is under involuntary control?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) Both B and C
- Answer: D
68. What structure contains numerous myofibrils within the sarcoplasm?
- A) Sarcomere
- B) Muscle fiber
- C) Myofilament
- D) Z disk
- Answer: B
69. Which of the following is a result of an increase in the number of myofibrils within muscle fibers?
- A) Atrophy
- B) Hypertrophy
- C) Fibromyalgia
- D) Myasthenia gravis
- Answer: B
70. What is the primary role of the respiratory muscles?
- A) Body movement
- B) Maintenance of posture
- C) Respiration
- D) Production of body heat
- Answer: C
71. Which structure facilitates action potential conduction between cardiac muscle cells?
- A) Z disk
- B) Myofibril
- C) Intercalated disks
- D) Sarcomere
- Answer: C
72. Which condition involves chronic muscle pain that is widespread in muscles and muscle-tendon junctions?
- A) Myasthenia gravis
- B) Myotonic muscular dystrophy
- C) Fibromyalgia
- D) Tendinitis
- Answer: C
73. What is the connective tissue that surrounds each skeletal muscle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: A
74. Which muscle characteristic allows it to respond to a stimulus?
- A)
Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: B
75. What is the role of the muscle fasciculi in skeletal muscle?
- A) Surrounds each muscle fiber
- B) Contains several muscle cells
- C) Contains numerous myofibrils
- D) Forms the sarcomere
- Answer: B
Sure! Here is a 75-item multiple-choice exam covering the content provided, with answers included:
1. What is the most abundant tissue in the body?
- A) Connective tissue
- B) Muscle tissue
- C) Nervous tissue
- D) Epithelial tissue
- Answer: B
2. Which muscle type is responsible for voluntary movement?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
3. Which of the following is NOT a function of the muscular system?
- A) Body movement
- B) Maintenance of posture
- C) Production of blood cells
- D) Respiration
- Answer: C
4. What type of muscle is responsible for the heart beating?
- A) Skeletal muscle
- B) Smooth muscle
- C) Cardiac muscle
- D) All of the above
- Answer: C
5. What is the connective tissue sheath surrounding each skeletal muscle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcomere
- Answer: A
6. Which structure is the basic functional unit of skeletal muscle?
- A) Myofibril
- B) Sarcomere
- C) Myosin
- D) Actin
- Answer: B
7. What characteristic allows skeletal muscle to return to its original resting length after being stretched?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: D
8. What type of contraction causes heat production in the body?
- A) Cardiac muscle contraction
- B) Smooth muscle contraction
- C) Skeletal muscle contraction
- D) None of the above
- Answer: C
9. Which type of muscle contraction is involved in propelling food in the digestive tract?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
10. Where are intercalated disks found?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) All of the above
- Answer: B
11. What structure extends from one Z disk to another Z disk?
- A) Myofibril
- B) Sarcomere
- C) Myosin
- D) Actin
- Answer: B
12. Which molecule provides a calcium binding site on actin myofilaments?
- A) Tropomyosin
- B) Troponin
- C) Myosin
- D) Actin
- Answer: B
13. What is the term for the most stationary end of a muscle?
- A) Origin
- B) Insertion
- C) Belly
- D) Aponeurosis
- Answer: A
14. Which muscle type is under voluntary control?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) None of the above
- Answer: C
15. What type of muscle has gap junctions to allow action potentials to spread?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) All of the above
- Answer: C
16. Which type of muscle has striations but is not as distinctly striated as skeletal muscle?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) All of the above
- Answer: B
17. What is the function of the retinaculum?
- A) Attaching muscle to bone
- B) Holding down tendons at the wrist and ankle
- C) Connecting muscle fibers
- D) Providing a calcium binding site
- Answer: B
18. What term describes a muscle acting in opposition to an agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: C
19. Which muscle flexes the elbow?
- A) Triceps brachii
- B) Biceps brachii
- C) Deltoid
- D) Pectoralis major
- Answer: B
20. What condition is characterized by painful, spastic contractions of muscle?
- A) Myasthenia gravis
- B) Tendinitis
- C) Cramps
- D) Fibromyalgia
- Answer: C
21. What is the main symptom of fibromyalgia?
- A) Muscle weakness
- B) Muscle pain
- C) Muscle atrophy
- D) Muscle hypertrophy
- Answer: B
22. What is the result of an increase in the number of myofibrils within muscle fibers?
- A) Muscle atrophy
- B) Muscle hypertrophy
- C) Muscle relaxation
- D) Muscle spasm
- Answer: B
23. What disorder is characterized by the failure of muscles to relax following a forceful contraction?
- A) Myotonic muscular dystrophy
- B) Myasthenia gravis
- C) Tendinitis
- D) Fibromyalgia
- Answer: A
24. What type of muscle contraction does not develop an oxygen debt?
- A) Skeletal muscle contraction
- B) Cardiac muscle contraction
- C) Smooth muscle contraction
- D) All of the above
- Answer: C
25. What type of drugs are used to treat myasthenia gravis?
- A) Anti-inflammatory drugs
- B) Immunosuppressive drugs
- C) Anti-cholinesterase drugs
- D) Muscle relaxants
- Answer: C
26. What is the term for inflammation of tendon attachment points?
- A) Tendinitis
- B) Myasthenia gravis
- C) Myotonic muscular dystrophy
- D) Fibromyalgia
- Answer: A
27. What is the name for a broad, sheet-like tendon?
- A) Fascia
- B) Retinaculum
- C) Aponeurosis
- D) Epimysium
- Answer: C
28. What does the term "striated" refer to in muscle tissue?
- A) Muscle fibers are spindle-shaped
- B) Muscle fibers have transverse bands
- C) Muscle fibers are connected by gap junctions
- D) Muscle fibers contract slowly
- Answer: B
29. What type of muscle fibers are organized into sarcomeres?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) Both A and C
- Answer: D
30. What muscle characteristic allows it to respond to a stimulus?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: B
31. What is the term for the ability of skeletal muscle to shorten with force?
- A) Extensibility
- B) Elasticity
- C) Contractility
- D) Excitability
- Answer: C
32. Which muscle type is responsible for peristalsis in the digestive tract?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
33. Which type of muscle contraction can lead to hypertrophy?
- A) Involuntary contraction
- B) Voluntary contraction
- C) Cardiac contraction
- D) Smooth muscle contraction
- Answer: B
34. What is the connective tissue surrounding individual muscle fibers called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: C
35. What structure is involved in muscle contraction and is composed of actin and myosin?
- A) Sarcomere
- B) Myofibril
- C) Myofilament
- D) All of the above
- Answer: D
36. Which muscle is the agonist in elbow extension?
- A) Biceps brachii
- B) Triceps brachii
- C) Deltoid
- D) Pectoralis major
- Answer: B
37. What term describes the decrease in muscle size due to a decrease in myofilaments within muscle fibers?
- A) Hypertrophy
- B) Atrophy
- C) Fibromyalgia
- D) Myasthenia gravis
- Answer: B
38. Which structure in cardiac muscle cells allows for action potential conduction between cells?
- A) Sarcomere
- B) Myofibril
- C) Intercalated disks
- D) Z disk
- Answer: C
39. Which of the following is NOT a characteristic of smooth muscle cells?
- A) Spindle-shaped
- B) Striated
- C) One nucleus per cell
- D) Less actin and myosin than skeletal muscle
- Answer: B
40. Which type of muscle is involved in all aspects of communication, such as speaking and writing?
- A) Cardiac muscle
- B) Smooth muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
41. What is the term for the connective tissue that surrounds a muscle fascicle?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: B
42. Which muscle type is influenced by hormones such as epinephrine?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) Both A and B
- Answer: D
43. Which of the following conditions involves chronic muscle pain syndrome?
- A) Myasthenia gravis
- B) Fibromyalgia
- C) Myotonic muscular dystrophy
- D) Tendinitis
- Answer: B
44. What type of connective tissue holds down tendons at each wrist and ankle?
- A) Epimysium
- B) Retinaculum
- C) Aponeurosis
- D) Perimysium
- Answer: B
45. What is the cytoplasm of a muscle fiber called?
- A) Sarcolemma
- B) Sarcoplasm
- C) Myoplasm
- D) Myofibril
- Answer: B
46. Which of the following conditions is characterized by muscle atrophy due to nerve damage or casting?
- A) Myasthenia gravis
- B) Fibromyalgia
- C) Hypertrophy
- D) Atrophy
- Answer: D
47. What is the term for the band of connective tissue that holds down tendons at the wrist and ankle?
- A) Fascia
- B) Retinaculum
- C) Aponeurosis
- D) Tendon
- Answer: B
48. What type of muscle fibers are not organized into sarcomeres?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) None of the above
- Answer: C
49. What is the condition called when the muscle has no tone due to severed nerve supply?
- A) Flaccid
- B) Hypertrophy
- C) Atrophy
- D) Fibromyalgia
- Answer: A
50. Which structure is attached to the Z disk?
- A) Actin myofilaments
- B) Myosin myofilaments
- C) Troponin
- D) Tropomyosin
- Answer: A
51. What term describes a muscle that accomplishes a certain movement?
- A) Agonist
- B) Antagonist
- C) Synergist
- D) Prime mover
- Answer: A
52. Which type of muscle contraction is under involuntary control?
- A) Skeletal muscle contraction
- B) Smooth muscle contraction
- C) Cardiac muscle contraction
- D) Both B and C
- Answer: D
53. What is the main characteristic of myasthenia gravis?
- A) Muscle hypertrophy
- B) Muscle atrophy
- C) Destruction of acetylcholine receptors
- D) Inflammation of tendons
- Answer: C
54. What muscle characteristic allows it to be stretched to its normal resting length and beyond?
- A) Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: C
55. What is the smallest functional unit of skeletal muscle capable of contracting?
- A) Myofibril
- B) Sarcomere
- C) Myofilament
- D) Sarcolemma
- Answer: B
56. Which muscle type is responsible for maintaining posture?
- A) Smooth muscle
- B) Cardiac muscle
- C) Skeletal muscle
- D) All of the above
- Answer: C
57. Which of the following structures is composed of actin and myosin myofilaments?
- A) Sarcomere
- B) Myofibril
- C) Muscle fiber
- D) All of the above
- Answer: D
58. Which condition involves chronic progressive autoimmune disease affecting acetylcholine receptors?
- A) Myasthenia gravis
- B) Myotonic muscular dystrophy
- C) Fibromyalgia
- D) Tendinitis
- Answer: A
59. What type of muscle is involved in heart contraction?
- A) Skeletal muscle
- B) Smooth muscle
- C) Cardiac muscle
- D) None of the above
- Answer: C
60. Which structure forms an attachment site for actin myofilaments?
- A) Myosin myofilaments
- B) Sarcomere
- C) Z disk
- D) Troponin
- Answer: C
61. What is the term for the muscle attachment point that undergoes the greatest movement?
- A) Origin
- B) Insertion
- C) Belly
- D) Aponeurosis
- Answer: B
62. What characteristic of cardiac muscle allows it to function as a unit?
- A) Sarcomeres
- B) Striations
- C) Intercalated disks
- D) Spindle shape
- Answer: C
63. Which of the following describes a muscle that acts in opposition to an agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: C
64. What is the connective tissue surrounding a muscle fascicle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: B
65. What condition results from the buildup of lactic acid causing muscle pain?
- A) Myasthenia gravis
- B) Tendinitis
- C) Cramps
- D) Fibromyalgia
- Answer: C
66. What term describes a muscle that accomplishes the same movement as the agonist?
- A) Agonist
- B) Synergist
- C) Antagonist
- D) Prime mover
- Answer: B
67. Which muscle type has a single nucleus per cell and is under involuntary control?
- A) Skeletal muscle
- B) Cardiac muscle
- C) Smooth muscle
- D) Both B and C
- Answer: D
68. What structure contains numerous myofibrils within the sarcoplasm?
- A) Sarcomere
- B) Muscle fiber
- C) Myofilament
- D) Z disk
- Answer: B
69. Which of the following is a result of an increase in the number of myofibrils within muscle fibers?
- A) Atrophy
- B) Hypertrophy
- C) Fibromyalgia
- D) Myasthenia gravis
- Answer: B
70. What is the primary role of the respiratory muscles?
- A) Body movement
- B) Maintenance of posture
- C) Respiration
- D) Production of body heat
- Answer: C
71. Which structure facilitates action potential conduction between cardiac muscle cells?
- A) Z disk
- B) Myofibril
- C) Intercalated disks
- D) Sarcomere
- Answer: C
72. Which condition involves chronic muscle pain that is widespread in muscles and muscle-tendon junctions?
- A) Myasthenia gravis
- B) Myotonic muscular dystrophy
- C) Fibromyalgia
- D) Tendinitis
- Answer: C
73. What is the connective tissue that surrounds each skeletal muscle called?
- A) Epimysium
- B) Perimysium
- C) Endomysium
- D) Sarcolemma
- Answer: A
74. Which muscle characteristic allows it to respond to a stimulus?
- A)
Contractility
- B) Excitability
- C) Extensibility
- D) Elasticity
- Answer: B
75. What is the role of the muscle fasciculi in skeletal muscle?
- A) Surrounds each muscle fiber
- B) Contains several muscle cells
- C) Contains numerous myofibrils
- D) Forms the sarcomere
- Answer: B