Neuromuscular recruitment

Question 1

Motor unit

Answer 1

an alpha motor neuron and all the fibers it innervates

Question 2

gross movement occurs when…

Answer 2

a single neuron innervates several fibers

Question 3

fine movement occurs when

Answer 3

a single neuron innervates only a few gibers

Question 4

What dictates the fiber type?

Answer 4

the moror neuron

Question 5

the bigger a neuron is the more___ it touches which results in

Answer 5

fibers, increase in muscle force or tension

Question 6

All or none principle

Answer 6

when a motor unit is recruites, all innervated fibers contract to fule potential

Question 7

what type of force is there if only a few motor units recruited?

Answer 7

little force

Question 8

what type of force is there are lots of motor units recruited?

Answer 8

huge force

Question 9

Size principle

Answer 9

low motor units get recruited first and than higher ones get recruited later
-type 1 motor units get recruited BEFORE type II

Question 10

rate coding

Answer 10

a motor unit can exert diffrent levels of force depending on the speed that it is stimulated (how it moves downstream)

Question 11

what is a single stimulus called with little force?

Answer 11

a twitch

Question 12

what is a single stimulus called with maximal force?

Answer 12

a tetnus

Question 13

phase 1 of rate coding:

Answer 13

latent period
-Ca+ gets released into sarcoplasm, and actin-myosin bind

Question 14

phase 2 of rate coding:

Answer 14

Contraction
-sarcomere shortens as a result of the actin-myosin cross bridge cycle

Question 15

Phase 3 of rate coding

Answer 15

relaxation period

Question 16

3 ways to chand muscle force:

Answer 16

1.recruit more muscle fibers using motor units
2.recruit BIGGER muscle fiber types (type II)
3.increase rate coding