10.1 – Structural and functional organization of muscles

Question 1

what are the functions of skeletal muscle?

Answer 1

heat production
blood sugar regulation
control of body openings and passages

Question 2

the endomysium is a connective tissue sheath that wraps around which of the following?

Answer 2

muscle fiber

Question 3

which describes a muscle fascicle?

Answer 3

a bundle fo muscle fibers surrounded by connective tissue

Question 4

what is the perimysium?

Answer 4

a connective tissue sheath bundling many muscle fibers into a fascicle

Question 5

the perimysium contains which of the following?

Answer 5

nerves
blood vessels
muscle spindles

Question 6

what are some functions of skeletal muscle?

Answer 6

heat production
joint stability
movement

Question 7

which describes the epimysium?

Answer 7

a connective tissue sheath surrounding an entire muscle

Question 8

which describes the endomysium?

Answer 8

a loose connective tissue layer around each individual muscle cell

Question 9

what is a fascia?

Answer 9

a thick sheet of connective tissue separating neighboring groups of muscles

Question 10

which term refers to bundles of muscle fibers, wrapped in connective tissue, within a muscle?

Answer 10

fascicles

Question 11

which term refers to the loose connective tissue layer that surrounds skeletal muscle fascicles?

Answer 11

perimysium

Question 12

stretch receptors called muscle spindles are located w/in which connective tissue layer?

Answer 12

perimysium

Question 13

circular muscles that form rings around body openings are also called ___

Answer 13

sphincters

Question 14

the epimysium is a connective tissue sheath that wraps around which of the following?

Answer 14

entire muscle

Question 15

the ___ surrounds muscle fibers

Answer 15

endomysium

Question 16

the ___ surrounds groups of muscles

Answer 16

fascia

Question 17

the ___ surrounds muscle fascicles

Answer 17

perimysium

Question 18

a muscle attaches to a bone thru a tendon. This is an example of a(n) ___ attachment

Answer 18

indirect

Question 19

which term refers to a sheet of connective tissue that separates neighboring muscles or muscle groups?

Answer 19

fascia

Question 20

which is an example of an aponeurosis?

Answer 20

the broad, sheet-like tendon located beneath the scalp

Question 21

unipennate (description)

Answer 21

all fascicles approach tendon from 1 side of the muscle

Question 22

bipennate (description)

Answer 22

fascicles insert on the tendon from both sides

Question 23

multipennate (description)

Answer 23

many bipinnate muscle units merge onto one tendon

Question 24

which term is another word for prime mover?

Answer 24

agonist

Question 25

muscles that form rings around body openings are described by shape as being ___ muscles

Answer 25

circular or
sphincter

Question 26

a muscle that is acting as a synergist during a joint action may do which of the following?

Answer 26

stabilize a joint to restrict undesirable movements of a bone

modify the direction of the movement produced by the prime mover

contract together w/ the prime mover to produce more power

Question 27

which describes a sphincter?

Answer 27

circular muscle that forms a ring around a body opening

Question 28

which term refers to a muscle that prevents a bone from moving during an action?

Answer 28

fixator

Question 29

T or F:
a muscle described as having a direct attachment is attached to the bone via a tendon or aponeurosis

Answer 29

false

(if a tendon or aponeurosis connects a muscle to a bone, it is an INDIRECT attachment)

Question 30

which term refers to a broad, sheet-like tendon?

Answer 30

aponeurosis

Question 31

in flexing the elbow, the prime mover is the ___

Answer 31

brachialis

Question 32

the biceps brachii helps the brachial flex the elbow. Which term best describes the role of the biceps brachii during elbow flexion?

Answer 32

synergist

Question 33

a muscle that holds a bone steady during an action is called a(n) ___

Answer 33

fixator