Muscle Contraction

Question 1

It is where actin myofilaments slide past myosin myofilaments during contraction

Answer 1

Sliding filament model

Question 2

During muscle relaxation, sarcomeres ________

Answer 2

Lengthen

Question 3

Is a single contraction of a muscle fiber in response to a stimulus

Answer 3

Muscle twitch

Question 4

3 phases of muscle twitch

Answer 4

Lag phase or latent phase
Contraction phase
Relaxation phase

Question 5

Time between the application of a stimulus and the beginning of contraction

Answer 5

Lag phase

Question 6

Time during which the muscle contracts

Answer 6

Contraction phase

Question 7

Time during the muscle relaxes

Answer 7

Relaxation phase

Question 8

Individual muscles contract more forcefully

Answer 8

Summation

Question 9

Sustained contraction when the frequency of stimulation is rapid that no relaxation occurs

Answer 9

Tetanus

Question 10

More motor units are stimulated, which increases the number of muscle fibers contacting

Answer 10

Recruitment

Question 11

Contains type I myosin
Muscle fibers contract more slowly
Work aerobically

Answer 11

Slow twitch fibers

Question 12

Contains type IIa or IIb myosin myofilaments
Muscle fibers contract quickly
Work anaerobically

Answer 12

Fast twitch fibers