Deck 3: How Muscles Function

Question 1

Which of the following is the term for a contraction wherein the muscle stays the same length?

A)isometric
B)contralateral
C)eccentric
D)concentric

Answer 1

A

Question 2

Which of the following is the term for a lengthening contraction?

A)isometric
B)contralateral
C)eccentric
D)concentric

Answer 2

C

Question 3

Which is the main function of a muscle?

A)contract and shorten
B)stretch
C)create a pulling force
D)stabilize a body part

Answer 3

C

Question 4

Which type of contraction occurs when an antagonist muscle contracts?

A)concentric
B)eccentric
C)isometric
D)stabilization

Question 5

The origin of a muscle is usually which attachment?

A)the distal one
B)the inferior one
C)the lighter one
D)the proximal one

Question 6

Where do reverse actions usually occur more often?

A)lower extremity
B)upper extremity
C)head
D)axial body

Question 7

Which type of contraction occurs when a muscle contracts with a force that is less than the resistance force?

A)eccentric
B)concentric
C)isometric
D)shortening

Question 8

Which defines a muscle as contracting?

A)myosin-actin cross-bridges
B)shortening
C)lengthening
D)staying the same length

Question 9

Which of the following can occur when a muscle concentrically contracts?

A)the distal attachment moves
B)the proximal attachment moves
C)both the distal and proximal attachments move
D)all of the above

Question 10

Which type of contraction occurs when a muscle contracts with a force that is equal to the resistance force?

A)eccentric
B)concentric
C)isometric
D)shortening

Question 11

When a muscle is contracting,which of the following must be true?

A)it is shortening
B)it is lengthening
C)it is staying the same length
D)none of the above

Question 12

Which attachment of a muscle usually moves?

A)proximal
B)distal
C)stable
D)inferior

Question 13

Which of the following must be true?

A)when a muscle shortens,it is concentrically contracting
B)when a muscle lengthens,it is eccentrically contracting
C)when a muscle lengthens,it is concentrically contracting
D)none of the above

Question 14

Which term describes the fascial tissue that surrounds each individual muscle fiber?

A)epimysium
B)endomysium
C)perimysium
D)Z-line

Question 15

Which is the term used to describe when a muscle contracts and its proximal attachment moves?

A)standard action
B)anatomic action
C)reverse action
D)antagonist action

Question 16

Which type of contraction occurs when a mover muscle contracts?

A)concentric
B)eccentric
C)isometric
D)stabilization

Question 17

What are the boundaries of a sarcomere?

A)actin filaments
B)myosin filaments
C)cross-bridges
D)Z-lines

Question 18

Which are the two types of filaments found in muscle tissue?

A)myofibrils and perimysium
B)fascicles and endomysium
C)actin and myosin
D)Z-lines and myosin heads

Question 19

Which of the following is the term for a shortening contraction?

A)isometric
B)contralateral
C)eccentric
D)concentric

Question 20

Which type of contraction occurs when a muscle contracts with a force that is greater than the resistance force?

A)stabilization
B)concentric
C)eccentric
D)isometric

Question 21

In the five-step approach to learning muscles,what is the first step?

A)reason out the actions of the muscle
B)look at the muscle's name to see what free information is given
C)memorize the attachments of the muscle
D)look at its context to adjacent soft tissues

Question 22

When visualizing a muscle that is being learned,how much detail is needed to figure out its actions?

A)knowing what joint it crosses,where it crosses the joint,and how it crosses the joint
B)knowing the exact attachment locations of the muscle
C)seeing the muscle in its context with adjacent muscles
D)all of the above

Question 23

A tendon is composed of which of the following tissues?

A)endomysium
B)perimysium
C)epimysium
D)all of the above

Question 24

Which of the following determines the action of a muscle?

A)its fiber architecture
B)the convergence of its endomysia,perimysia,and epimysium
C)how many myosin-actin cross-bridges it forms
D)its line of pull relative to the joint it crosses

Question 25

Which of the following is a general rule regarding muscle function?

A)if a muscle crosses a joint,it can have an action at that joint
B)if a muscle crosses a joint,it can have an action at the adjacent joint
C)if a muscle does not cross a joint,it can have an action at that joint
D)if a muscle crosses two joints,it can have an action at only one of those joints

Question 26

When learning a muscle,which of the following is generally true?

A)its actions can be figured out
B)its attachments can be figured out
C)its actions must be memorized
D)both its actions and attachments must be memorized

Question 27

Which are the two major architectural types of muscle fiber arrangement?

A)unipennate and multipennate
B)fusiform and bipennate
C)longitudinal and pennate
D)fan-shaped and rectangular-shaped