Which off the following does NOT occur during skeletal musclecontraction?
Titin fibers compress
Actin and myosin shorten
Sarcomers shorten
2. Action potential propagated along the sarcolemma stimulate___________ located on transverse tubules.2.
Nicotinic receptors
Ryanodine receptors
DHP receptors
3. Which of the following does not occur during the \"Excitation\"of a skeletal muscle?
Group of answer choices
The cell membrane depolarizes
ATPase on myosin heads split ATP
The myosin head binding site on actin is exposed
The passive force of contraction increases
4. What happens as an IMMEDIATE result of Ryanodine receptors onthe sarcoplasmic reticulum being stimulate?
Ryanodine receptors simulate DHP receptors on T-tubules
Myosin cross bridges are formed
Calcium ions diffuse out of the saroplasmic reticulum
5. Why does lactic acid produced during anaerobic metabolismcause fatigue?
Because H+ from lactic acid interfers with crossbridgeformation
Because lactic acid produced duirng anaerobic metabolismproduces only 2 molecules of ATP
Because the myosin head is denature by lactic aci
