2so Chapter Eleven The Muscular System: Muscle serwenare and Fanction 11.9 Motor

ID: 167468 • Letter: 2

Question

2so Chapter Eleven The Muscular System: Muscle serwenare and Fanction 11.9 Motor Units and Muscle Fatigue (Human subject) than one. 13. Match the characteristic listed in column Awith the muscle fiber type isted in column B. Answers may be used more Column B Column A 1. fast-twitch with high fatigue resistance b, Type Ila 2 fast-twitch with moderate fatigue resistance e, Type IIb 3. largest fiber cross-sectional 4 slow twitch with very low fatigue resistance 5. smallest fiber crass-sectional area demanded of skeletal muscle. as increased force is 14, Rank the motor units in the order of necruitment b Type la c. Type IIb (highinow. the speed of 15. If a muscular contraction requires the recruitment of Type Ilb muscle fbers,the force produced wil be lwilwil not be able to be sustained for significant and the contraction contraction will be length of time. of Skeletal Muscle (Wet Labl 11.10: 16. Adding which of the folowing solutions to the glycerinated muscle preparation resulted in contraction? (check all that apply) O ATP only b, salts only ATP salts c (True/False) 17. When the supply of ATP in a muscle runs out, myosin heads remain detached from actin. Exercise 11.11: PhLL S. Lesson 5: Stimulus-Dependent Force Generation 8. Put the following phases of muscle twitch in the correct order. a period of contraction b, latent period c. period of relaxation 19 Match the description of the stimulus applied to a muscle fiber listed in column Awith the corresponding definition listed in column B 9 Column B Column A 1. not strong enough to produce a muscle twitch a subthreshold 2 strong enough to produce a muscle twitch but no summation b. suprathreshold 3. stronger than necessary to cause summation c. threshold

Explanation / Answer

Question number 13:

Type IIb - Fast-twitch with high fatigue resistance

Type IIa - Fast-twitch with moderate fatigue resistance

Type IIb - largest fiber cross sectional area

Type I - Slow-twitch with very low fatigue resistance

Type I - Smallest fiber cross sectional area

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

Muscle Fiber Type

Twitch

Fatigue

Cross Sectional Area

Type I

Slow

Low

Smallest

Type IIa

Fast

Moderate

Medium

Type IIb

Fast

High

Largest