Olete.in – MCQs, Mock Tests & Government Job Prep | Pharmacist Qualifying Examination[PEBC-Canada] Human Anatomy and Physiology Muscle Mcq

Which of the following muscles is a common intra-muscular injection site?

1. deltoid
2. vastus medialis
3. gluteus maximus
4. latissimus dorsi

✅ Correct Answer: 1

Which one of the following is NOT a characteristic of skeletal muscle?

1. contractility
2. autonomic innervation
3. excitability
4. extensibility

✅ Correct Answer: 2

By which term is a muscle that opposes or reverses a particular movement called?

1. fixator
2. synergist
3. agonist
4. antagonist

✅ Correct Answer: 4

Smooth muscle cells may be described by which of the following?

1. striated, involuntary, uninucleate
2. not striated, voluntary, multinucleate
3. not striated, involuntary, uninucleate
4. striated, voluntary, multinucleate

✅ Correct Answer: 3

During muscle cell contraction, what happens because of Ca ++ binding to troponin?

1. ATP hydrolyses to ADP.
2. The binding site on actin is uncovered.
3. Acetylcholine (ACh) is released.
4. The cross-bridge disengages from the thin filament.

✅ Correct Answer: 2

What causes the myosin binding site of an actin molecule to be exposed?

1. calcium ions attaching to troponin
2. ATP attaching to the myosin cross-bridge
3. a nerve impulse reaching the motor end plate of a motor nerve
4. acetylcholine crossing the neuromuscular junction

✅ Correct Answer: 1

Which of the following muscles is NOT named after its location in the body?

1. fl exor carpi radialis
2. rectus abdominus
3. sternocleidomastoid
4. biceps brachii

✅ Correct Answer: 3

Which protein(s) are found in thin myofi laments?

1. actin, tropomyosin, and troponin
2. actin and tropomyosin
3. actin
4. actin, myosin, tropomyosin and troponin

✅ Correct Answer: 4

One of the following is NOT a function of testosterone, which one?

1. Maintains glands of the reproductive tract.
2. Stimulates anterior pituitary to release FSH and LH.
3. Maintains secondary sex characteristics.
4. Stimulates spermiogenesis.

✅ Correct Answer: 2

Which is the largest of the structures in a muscle fi bre?

1. myofilament
2. myopic
3. myofibril
4. myosin

✅ Correct Answer: 3