pearson chap 6

deltoid

Which of these terms refers to the shape of a​ muscle?

latissimus dorsi

Which of these muscles moves the upper​ limb?

Lactic acid

Which chemical is produced during vigorous exercise when the supply of oxygen is limited or​ inadequate?

What changes occur in the sarcomere during muscle​ contraction?

Z discs move closer together.

myasthenia gravis

Amelie, a​ 29-year-old woman, complained to her doctor of being constantly fatigued and having difficulty swallowing. Her speech is slurred and her eyelids are droopy. Amelie most likely has​ __________.

The arrangement of fascicles in orbicularis oris is​ ________.

Circular

acetylcholine binding to receptors on the sarcolemma within the neuromuscular junction

What initiates an action potential on a muscle​ cell?

Calcium

What mineral is released within muscle cells to trigger​ contraction?

directly regenerates ATP from ADP within a muscle cell

What is the function of creatine​ phosphate?

degeneration of motor neurons

ALS​ (amyotrophic lateral​ sclerosis) is a disease that results in progressive paralysis. While the ultimate cause is​ unknown,__________ is the direct cause of the paralysis.

Resistance exercise

What type of exercise causes increase in muscle​ size?

endomysium

Which layer of connective tissue surrounds each skeletal muscle​ fiber?

intercalated discs

Which of these characteristics applies only to cardiac muscle​ tissue?

supination

Which movement is associated with the hand but actually occurs in the​ forearm?

sarcolemma

The plasma membrane of a skeletal muscle cell is called the​ ________.

cardiac muscle

What type of muscle tissue is both striated and​ involuntary?

rectus femoris

Which of these muscles extends the​ knee?

resistance exercise

What type of exercise causes increase in muscle​ size?

What happens to a muscle when the nerve supplying that muscle is​ cut?

Muscle paralysis and atrophy occur.

The deepest muscle of the abdominal wall

transversus abdominis.

triceps brachii

Which of these muscles is the prime mover of elbow​ extension?