If a muscular contraction requires the recruitment of Type muscle fibers, the fo

ID: 167472 • Letter: I

Question

If a muscular contraction requires the recruitment of Type muscle fibers, the force produced will be _____ (high/low), the speed of contraction will be _____ (fast/slow), and the contraction _____ (will/will not) be able to be sustained for a significant length of time. Adding which of the following solutions to the glycerinated muscle preparation resulted in contraction? (Check all that apply.) _____ a. ATP only _____ b. salts only _____ c. ATP + salts When the supply of ATP in a muscle runs out, myosin heads remain detached from actin. _____ (True/False) Put the following phases of a muscle twitch in the correct order. _____ a. period of contraction _____ b. latent period _____ c. period of relaxation Match the description of the stimulus applied to a muscle fiber listed in column A with the corresponding definition listed in column B. Column A _____ 1. not strong enough to produce a muscle twitch _____ 2. strong enough to produce a muscle twitch but no summation _____ 3. stronger than necessary to cause summation Column B a. subthreshold b. suprathreshold c. threshold

Explanation / Answer

Question Number 15:

If a muscular concentration requires the recruitment of Type IIb muscle fibers, the force produced will be high, the speed of contraction will be Fast, and the contraction will not be able to be sustained for a significant length of time.

Muscle Fiber Type

Force

Speed

Sustainability

Type I

Low

Slow

Extended period

Type IIa

High

Fast

Milliseconds

Type IIb

High

Fast

Milliseconds

Note: As per the guidelines we can answer only first question. So, I did not answer the remaining questions. Hope you can understand.