Question

Question 1. Action potential propgated along the sarcolemma stimulate _____________located on transverse tubules.

A. DHP receptors

B.Nicotinic receptors

C. Ryanodine receptors

Question 2. Which of the following does NOT occur during skeletal muscle contraction?

A. sacromers shorten

B. actin and myosin shorten

C. titin fibers compress

Question 3. Which if the following does NOT occur during the "Excitation" of a skeletal muscle?

A. The myosin head binding site on actin is exposed.

B. The passive force of contraction increases

C. ATPase on myosin heads split ATP

D.The cell membrane depolarizes

Question 4. why does lactic acid produced during anaerobic metabolism cause fatigue?

A. the myosin head is denatured by lactic acid

B. H+ from lactic acid interferes with cross bridge formation

C. Lactic acid produced during anaerobic metabolism only produces 2 molecules of ATP

Question 5. What happens as an immediate result of ryanodine receptors on the sarcoplasmic reticulum being stimulated?

A. mysoin cross brudges are formed

B.Calcium ions diffuse out of the sarcoplasmic reticulum

C. Ryanodine receptors stimulate DHP receptors on T-tubules

Answer 1

Question 1. Action potential propgated along the sarcolemma stimulate DHP receptors located on transverse tubules.

Which of the following does NOT occur during skeletal muscle contraction

Answer :  titin fibers compress

Question 3. Which if the following does NOT occur during the "Excitation" of a skeletal muscle?

A. The myosin head binding site on actin is exposed.

Question 4. why does lactic acid produced during anaerobic metabolism cause fatigue?

Answer: H+ from lactic acid interferes with cross bridge formation

Question 5. What happens as an immediate result of ryanodine receptors on the sarcoplasmic reticulum being stimulated?

Answer: Calcium ions diffuse out of the sarcoplasmic reticulum