10 and 11

Question 1

what are the functions of skeletal muscle

Answer 1

Produce movement, maintain posture and body position, support soft tissue, guard body entrances and exits, maintain body temperature, store nutrients

Question 2

what are layers of connective tissue

Answer 2

Epimysium, perimysium, endomysium

Question 3

what is the definition of tendon

Answer 3

Collagenous band that connects a skeletal muscle to and element of the skeleton

Question 4

what is the definition of ligament

Answer 4

Dense band of connective tissue fibers that attaches one bone to another

Question 5

why does skeletal muscle have multiple nuclei

Answer 5

Multinucleate

Question 6

actin is responsible for

Answer 6

thin filaments

Question 7

myosin is responsible for

Answer 7

thick filaments

Question 8

roles of actin in contraction and relaxation

Answer 8

pulled towards the centers of the sarcomeres, pulled away from the centers of the sarcomeres

Question 9

roles of myosin in contraction and relaxation

Answer 9

pull the thin filament towards the center of sarcomere, pull thin filament away from the center of sarcomere

Question 10

Z line

Answer 10

Bisect I Band, consist of actins

Question 11

M line

Answer 11

Subdivision and center of A band, help stabilize positions of thick filaments

Question 12

H band

Answer 12

Subdivision of A band, on either side of the M line, contains thick filaments

Question 13

A band

Answer 13

Contains thin and thick filaments

Question 14

I band

Answer 14

Contains thick filaments

Question 15

Path of action potential

Answer 15

Depolarization and repolarization events produce an electrical impulse

Question 16

What is a single motor neuron with all the muscle fibers it innervates called.

Answer 16

motor neurons

Question 17

concentric

Answer 17

tension remains constant but the muscle shortens

Question 18

eccentric

Answer 18

tension remains constant but the muscle lengthens

Question 19

isotonic

Answer 19

tension increases but the skeletal muscle shortens

Question 20

isometric

Answer 20

tension rises but muscle length stays the same

Question 21

What can a mitochondria supply at peak levels of muscle exertion?

Answer 21

1/3 of ATP needs

Question 22

Parallel

Answer 22

fascicles are parallel to the long axis of the muscle

Question 23

Circular

Answer 23

fascicles are concentrically arranged around and opening

Question 24

Pennate

Answer 24

fascicles form a common angle with the tendon

Question 25

Convergent

Answer 25

fascicles extending over a broad area coming together on a common attachment site

Question 26

Antagonistic

Answer 26

opposing movement of agonist

Question 27

Agonist/Prime mover

Answer 27

responsible for a specific movement

Question 28

Synergist

Answer 28

helps larger agonist work efficiently

Question 29

The names of the muscles can indicate what?

Answer 29

position, direction, fascicle arrangement, structural characteristics, action

Question 30

Terms for muscle actions

Answer 30

abductor, adductor, depressor, extension, flexor, levator, pronator, supinator, tensor

Question 31

internus/profundus

Answer 31

deeper muscles

Question 32

externus

Answer 32

muscles visible at body surface