Exam 2 pt1

Question 1

Which is more mechanically advantegous?

Answer 1

relatively longer muscle force arm than resistance arm

Question 2

If joint torques are equal, shortening the length of the force lever will then require less force

Answer 2

False

Question 3

What is a motor unit?

Answer 3

s ingle motor neuron and all the muscle fibers it inervates

Question 4

A motor unit can only inervate on type of muscle

Answer 4

false

Question 5

Which activity would result in the most amount of recruited motor units and muscle fibers?

Answer 5

power clean

Question 6

Thoracic nerves originate from the cervical spine

Answer 6

false

Question 7

If someone is standing on a moving platform they can never be balanced?

Answer 7

false

Question 8

What proprioceptors located in muscle/tendon?

Answer 8

golgi tendon organ and muscle spindles

Question 9

eccentric forces are smaller than concentric forces based on force velocity curve

Answer 9

false

Question 10

fine motor skills typically don’t need to recruit lot of motor units to complete the task

Answer 10

True

Question 11

when can a muscle produce the most amount of active force?

Answer 11

In the middle (100-300%) of the length tension curve

Question 12

when can a muscle produce the most amount of total force?

Answer 12

when the muscle is lengthened

Question 13

if the mechanical advantage is greater than one this means that the

Answer 13

there will be an effort advantage

Question 14

a motor unit can recruit a portion of the fibers it innervates?

Answer 14

false

Question 15

when standing have a wider base is more stable than having your feet together

Answer 15

True

Question 16

Before a muscle can produce force, what must happen first?

Answer 16

the proper amount of stimulus must occur causing an action potential

Question 17

active insufficiency is when a muscle is shortened to the point where it can’t produce force

Answer 17

True

Question 18

efferent nerves

Answer 18

send signals from the CNS to the periphery

Question 19

what are the two types of nerves that relay signals from the periphery to the CNS then back to the periphery?

Answer 19

efferent and afferent

Question 20

large amounts of force must be produced in order to turn on the autogenic inhibitors

Answer 20

True

Question 21

Treppe refers to the increase in muscle force coming form several maximal stimulus

Answer 21

True

Question 22

which of the following is the major integrator of sensory impulses?

Answer 22

cerebellum

Question 23

Which type of mechanical levers are more common in the human body?

Answer 23

type 3 lever

Question 24

the “all or nothing” principle refers to a motor unit being able to only recruit of the muscle fibers it inervates

Answer 24

false

Question 25

what is the brief time interval that follows a stimulus when muscle force production has not yet been generated?

Answer 25

latent period

Question 26

what is the advantage of 3rd class levers in the human body?

Answer 26

allows greater range of motion