Studied by 182 people
triceps brachii
List two of the seven criteria listed in your lab manual that are used to name muscles?
Location
Direction of muscle fibers
Relative Size
Number of origins
Location of origin and insertion
Shape
Action
Identify the type of muscle tissue shown?
cardiac
What are the individual contractile units of a muscle cell called?
sarcomeres
Identify the indicated region of the sarcomere.
thin filaments
Identify the indicated region of the sarcomere.
H-zone
Identify the indicated structure.
triad
Identify the indicated layer of connective tissue.
endomysium
The space between a neuron axon terminal and the target cell is called:
synaptic cleft
The dark segments of the striations of a skeletal muscle cell are called:
A-bands
A portion of the plasma membrane of a skeletal muscle indents into the cytoplasm and surrounds the bundles of muscle filaments. This structure is called:
t-tubule
What do we call muscles that are primarily responsible for producing a specific movement?
agonists
Which of the seven criteria used for naming a muscle applies to the biceps femoris muscle?
number of origins and location
Which of the seven criteria used for naming a muscle applies to the adductor magnus muscle?
action and relative size
By steadily increasing the number of motor units that are activated, we produce a steady increase in the force produced by a muscle. This process is called __________________?
recruitment
A neuron and all of the muscle cells that it stimulates are together called a _________________?
motor unit
The absence of what molecule is involved in the phenomenon of rigor mortis?
ATP
The three phases of a muscle twitch are the contraction period, the latent period, and the:
relaxation period
Name one action of the tibialis anterior muscle.
a)extension of the toes at the phalangeal joints
b)dorsiflexion of the foot at the tarsal joints
c)pronation of the hand
d)flexion of the lower leg at the knee
e) adduction of thigh at the hip
b) dorsiflexion of the foot at the tarsal joints
Name one action of the supraspinatus muscle.
A)elevation of the mandible
B)rotation of the head
C)abduction of the arm at the shoulder
D)lateral rotation of the vertebral column
E)elevation of the scapula
C)abduction of the arm at the shoulder
Name one action of the sternocleidomastoid muscle.
A)abduction of the arm at the shoulder
B)depression of the ribs
C)extension of the neck
D)rotation of the head
E)elevation of the mandible
D)rotation of the head
Name one action of the rectus abdominis muscle.
A)pronation of the forearm
B)pulls the ribs toward one another to elevate the rib cage
C)flexion of the thigh at the hip
D)extension of the vertebral column
E)Flexion and rotation of the vertebral column
E)Flexion and rotation of the vertebral column
Name one insertion of the flexor carpi radialis muscle.
A)base of metacarpal 5
B)base of metacarpals 2 and 3
C)medial epicondyle of the humerus
D)olecranon process of the ulna
E) midshaft of the radius
B)base of metacarpals 2 and 3
Name one insertion of the deltoid muscle.
A)deltoid tuberosity of the humerus
B)acromion of the scapula
C)coracoid process
D)clavicle
E)fovea capitis of the femur
A)deltoid tuberosity of the humERUS
Name one insertion of the platysma muscle.
A)styloid process of the temporal bone
B)mastoid process of the temporal bone
C)fascia of the chest
D)maunbrium of the sternum
E)lower margin of the mandible
E)lower margin of the mandible
Name one insertion of the infraspinatus muscle.
A)acromion of the scapula
B)supraspinous fossa of the scapula
C)clavicle
D)greater tubercle of the humerus
E)infraspinous fossa of the scapula
D)greater tubercle of the humerus
Name one origin of the sternocleidomastoid muscle.
A)mastoid process of the temporal bone
B)lower margin of the mandible
C)styloid process of the temporal bone
D)manubrium of the sternum
E)maxillary bone
D)manubrium of the sternum
Name one origin of the tibialis anterior muscle.
A)lateral condyle of the femur
B)metatarsal 5
C)distal anterior surface of the fibula
D)lateral condyle of the tibia
E)medial cuneiform bone
D)lateral condyle of the tibia
Name one origin of the masseter muscle.
A)angle and ramus of the mandible
B)temporal fossa
C)orbicularis oris muscle
D) mastoid process of the temporal bone
E)zygomatic arch
E)zygomatic arch
Name one origin of the vastus medialis muscle.
A)linea aspera of the femur
B)iliac crest
C)tibial tuberosity
D)anterior inferior iliac spine
E)patella
A)linea aspera of the femur
Identify the indicated muscle.
external oblique abdominal
Identify the indicated muscle.
rectus abdominis
Identify the indicated muscle.
masseter
Identify the indicated muscle.
sternocleidomastoid
Identify the indicated muscle.
orbicularis occuli
Identify the indicated muscle.
buccinator
Identify the indicated muscle.
sternohyoid
Identify the indicated muscle.
sternocleidomastoid
Identify the indicated muscle.
internal intercostals
Identify the indicated muscle.
pectoralis major
Identify the indicated muscle.
serratus anterior
Identify the indicated muscle.
brachialis
Identify the indicated muscle.
coracobrachialis
Identify the indicated muscle.
teres major
Identify the indicated muscle.
extensor carpi ulnaris
Identify the indicated muscle.
Pronator teres
Identify the indicated muscle.
palmaris longus
Identify the indicated muscle.
iliacus
Identify the indicated muscle.
pectineus
Identify the indicated muscle.
biceps femoris
Identify the indicated muscle.
fibularis longus
What neurotransmitter do motor neurons use to stimulate muscle cells?
acetylcholine
Identify the indicated region of the sarcomere.
M-line
Identify the indicated layer of connective tissue.
perimysium
A bundle of skeletal muscle cells within a skeletal muscle is called:
fascicle
The branches at the end of an axon of a motor neuron are called:
axonal terminals
Define "origin" as it applies to skeletal muscles.
immovable site of attachment
If we require a muscle to contract until it starts to run out of ATP, what do we call the state of the muscle at that point?
fatigue
The three phases of a muscle twitch are the contraction period, the relaxation period, and the:
latent period
Although no force is generated by a muscle fiber during the latent period, chemical changes, such as the release of ions from the sarcoplasmic reticulum do occur. Which ion is released
calcium
What type of force is produced by the physiological contraction of a muscle rather than by elastic recoil?
active
Name one action of the infraspinatus muscle.
A)medial rotation of the arm at the shoulder
B)Flexion and rotation of the vertebral column
C)lateral rotation of the arm at the shoulder
D)elevation of the scapula
E)flexion of the forearm at the elbow
C)lateral rotation of the arm at the shoulder
Name one action of the brachialis muscle.
A)abduction of the forearm at the elbow
B)extension of the arm at the shoulder
C)flexion of the forearm at the elbow
D)extension of the forearm at the elbow
E)flexion of the fingers at the metacarpal joints
C)flexion of the forearm at the elbow
Name one action of the zygomaticus minor muscle.
A)elevation of the mandible
B)closes the eyelids
C)rotation of the head
D)elevation of the lateral corners of the mouth
E)compresses the cheeks
D)elevation of the lateral corners of the mouth
Name one insertion of the external oblique muscle.
A)coracoid process
B)fovea capitis of the femur
C)xiphoid process
D)anterior surface of the lower eight ribs
E)linea alba
E)linea alba
Name one insertion of the sternocleidomastoid muscle.
A)styloid process of the temporal bone
B)manubrium of the sternum
C)lower margin of the mandible
D)mastoid process of the temporal bone
E)clavicle
D)mastoid process of the temporal bone
Name one insertion of the brachialis muscle.
A)olecranon process of the ulna
B)coronoid process of the ulna
C)distal portion of the anterior humerus
D)coracoid process
E)styloid process of the radius
B)coronoid process of the ulna
Name one insertion of the trapezius muscle.
A)acromion and spinous process of the scapula
B)intertubercular sulcus of the humerus
C)greater tubercle of the humerus
D)spinous processes of the thoracic vertebra
E)occipital bone
A)acromion and spinous process of the scapula
Name one origin of the supraspinatus muscle.
A) spinous processes of the thoracic vertebrae
B) acromion and spinous process of the scapula
C)greater tubercle of the humerus
D)supraspinous fossa of scapula
E)infraspinous fossa of the scapula
D)supraspinous fossa of scapula
Name one origin of the gastrocnemius muscle.
A)patella
B)medial cuneiform bone
C)medial and lateral condyles of the femur
D)linea aspera of the femur
E)calcaneus
C)medial and lateral condyles of the femur
Name one origin of the tibialis anterior muscle.
A)lateral condyle of the tibia
B)medial cuneiform bone
C)lateral condyle of the femur
D)metatarsal 5
E)distal anterior surface of the fibula
A)lateral condyle of the tibia
Name one origin of the buccinator muscle.
A)spinous process of the temporal bone
B)maxillary bone
C)zygomatic bone
D)skin of the eyebrow
E)orbicularis oris muscle
B)maxillary bone
Identify the indicated structure.
linea alba
identify the indicated muscle.
transverse abdominis
Identify the indicated muscle.
buccinator
identify the indicated muscle.
zygomaticus major
Identify the indicated muscle.
orbicularis oris
Identify the indicated muscle.
mylohyoid
Identify the indicated muscle.
external intercostals
Identify the indicated muscle.
pectoralis minor
Identify the indicated muscle.
serratus anterior
Identify the indicated muscle.
infraspinatus
Identify the indicated muscle.
teres minor
Identify the indicated muscle.
coracobrachialis
Identify the indicated muscle.
extensor carpi radialis longus
Identify the indicated muscle.
palmaris longus
Identify the indicated muscle.
sartorius
Identify the indicated muscle.
gracilis
Identify the indicated muscle.
biceps femoris
Identify the type of muscle tissue shown?
skeletal
Identify the indicated region of the sarcomere.
thick filaments
Identify the indicated region of the sarcomere.
Z-disc
Identify the indicated structure.
terminal cistern of sarcoplasmic reticulum
The connective tissue sheath that forms around an individual skeletal muscle cell is called:
endomysium
The connective tissue sheath that forms around a bundle of skeletal muscle cells is called:
perimysium
The connective tissue sheath that forms around an entire skeletal muscle is called:
epimysium
What do we call muscles that oppose or reverse a particular movement?
antagonists
Which of the seven criteria used for naming a muscle applies to the transversus abdominis muscle?
direction of fibers and location
If we place a muscle under more load than it can lift and stimulate it, what type of contraction will we produce?
isometric
What type of force is produced by the elastic recoil of a stretched muscle?
passive
Identify the indicated region of the sarcomere.
I-band
