By which term is a muscle that opposes or reverses a particular movement called?
1.fixator
2.synergist
3.agonist
4.antagonist
Posted Date:-2022-08-24 09:30:04
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.
Posted Date:-2022-08-24 09:32:00
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.
Posted Date:-2022-08-24 09:39:17
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
Posted Date:-2022-08-24 09:31:06
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
Posted Date:-2022-08-24 09:32:53
Which is the largest of the structures in a muscle fi bre?
1.myofilament
2.myopic
3.myofibril
4.myosin
Posted Date:-2022-08-24 09:40:49
Which of the following muscles is a common intra-muscular injection site?
1.deltoid
2.vastus medialis
3.gluteus maximus
4.latissimus dorsi
Posted Date:-2022-08-24 09:25:58
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
Posted Date:-2022-08-24 09:33:57
Which one of the following is NOT a characteristic of skeletal muscle?
1.contractility
2.autonomic innervation
3.excitability
4.extensibility
Posted Date:-2022-08-24 09:29:17
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
Posted Date:-2022-08-24 09:35:49