Skeletal muscle has a defined contraction period, causing the full contraction of every stimulated fiber. (8...

50.1K

Verified Solution

Question

Medical Sciences

Skeletal muscle has a defined contraction period, causing thefull contraction of every stimulated fiber. (8 pts)
Part 1 - What determines the length of time during which thefiber contracts?
Part 2 - What ends the contraction, so relaxation can begin?(not including the termination of the NMJ stimulation)
Part 3 - Taking the previous two parts, and now adding in thatthe NMJ has stopped inducing depolarizations at the motor endplate, describe the events as the contraction cycle (each singletwitch) ends.
Part 4 - Taking the previous three parts, and now adding in thatthe NMJ continues to induce depolarizations at the motor end plate,explain the generation of increased muscle tension as summationoccurs.

Answer & Explanation Solved by verified expert

4.0 Ratings (834 Votes)

1 Muscle activity is the repetition of the contraction and relaxation phase Contraction or the shortening occurs when the calcium ions are released from the sarcoplasmic reticulum into the muscle fiber And the relaxation occurs with the active uptake of the calcium back into the sarcoplasmic reticulum Thus the length of the contraction of the muscle fiber is between the calcium release and calcium uptake events it is based on the stimulation of the motor unit 2 The relaxation event See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member