Muscle Physiology ML 4

Question 1

Whole muscle tension is developed by?

Answer 1

tension developed by each fiber and number of active fibers

Question 2

Motor units are the same fiber type as the cells (true/false)

Answer 2

true

Question 3

Why is the smallest motor neurons recruited first

Answer 3

because it has a smaller cell body so it can depolarize faster

Question 4

When will the large motor neurons be recruited?

Answer 4

recruited only if level of excitatory synaptic input increases, it will then be recruited later

Question 5

If muscles are not used was happens

Answer 5

atrophy

Question 6

regular endurance excerices does what?

Answer 6

enable muscle to use O2 more efficiently

Question 7

anaerobic, short duration, high intensity excericse casues what

Answer 7

increase of glycolytic enzymes and enlargment of fast glycolytic fibers

Question 8

Myostatin

Answer 8

protein that regulates skeletal muscle growth