Unit 3: Muscles Quiz Questions

Question 1

What determines the strength of a contraction, or how many motor units fire?

Answer 1

nutrients
strength of stimulus
load on a muscle
muscle temperature

Question 2

During kinesiological analysis, the moving end of a muscle is referred to as the

Answer 2

Insertion

Question 3

If you are steadily holding a weight in front of you, your biceps (arm muscles) are in what type of contraction?

Answer 3

isometric

Question 4

As you slowly lower your leg from a kick to the front, your rectus femoris (anterior thigh muscle) is contracting

Answer 4

eccentrically

Question 5

As your leg ascends in a kick to the front, your rectus femoris is contracting

Answer 5

concentrically

Question 6

As your leg ascends in kick to the front, your hamstrings (posterior thigh muscles) are

Answer 6

antagonists

Question 7

If a muscle is acting to hold your hips stationary during a fan kick, that muscle is in a[n]

Answer 7

isometric contraction

Question 8

Muscle activity that results in shortening of a muscle is what type of contraction?

Answer 8

concentric

Question 9

These structures monitor the perpetual internal changes that occur to keep the body in balance and motion.

Answer 9

proprioceptors

Question 10

Tendons are

Answer 10

extensible

Question 11

A long distance runner probably has more of this type of fiber than a sprinter.

Answer 11

slow twitch

Question 12

These inhibit a muscle when it is reaching dangerous levels of contraction.

Answer 12

Golgi tendon organs

Question 13

The muscle that is positioned to create a specific movement most effectively is called a:

Answer 13

Prime mover

Question 14

What purpose do bursae serve?

Answer 14

Bursae are small fluid filled sacks that cushion tendon and bone.

Question 15

What is one reason an aponeurosis (a type of tendon) is useful?

Answer 15

They can attach muscle when there is no bone to attach to.

Question 16

Why might ballistic stretching be counterproductive?

Answer 16

It is forcing shortening and harsh contractions in the muscle you are trying to lengthen.

Question 17

Why might ballistic stretching be productive?

Answer 17

Some argue that bouncing keeps the fascia healthy. Also it is considered a subset of dynamic stretching.

Question 18

What are the reasons that static stretching might be an inefficient warm up?

Answer 18

Doesn’t warm up muscle It can impair performance
Doesn’t lower risk of injury
Doesn’t reduce soreness
Perhaps sets up the wrong state of mind for activity

Question 19

What are the four general principles of kinesiological analysis?

Answer 19

1) muscles pull

2) muscles contract in the center and pull equally on both sides

3) the action of a muscle on a joint is determined by where it attaches and the path of the muscle

4) muscles often oppose gravity to produce movement or maintain position

Question 20

Briefly describe one of the simple balance tests suggested in the proprioception article.

Answer 20

The article suggests timed standing on one leg with their eyes closed for 30 seconds. This should be repeated on different surfaces like foam or wobble boards.

Question 21

What are the three assumptions underlying Sally Fitt’s “An Approach to Kinesiological Analysis of Efficient and Effective Movement.”

Answer 21

1) all movements should be performed with the least amount of contracted muscles as possible - using mostly prime movers

2) gravity’s affect must be considered

3) dancers must learn to self-analyze their movements