Exam 3

Question 1

Epimysium location

Answer 1

exterior of muscle

Question 2

epimysium function

Answer 2

separates muscle from surrounding tissue

Question 3

perimysium location

Answer 3

surrounds fasicles

Question 4

perimysium function

Answer 4

contains blood vessels and nerve supply

Question 5

endomysium location

Answer 5

surrounds individual muscle cells

Question 6

endomysium function

Answer 6

contains capillaries, nerve cells, and stem cells

Question 7

fascicles

Answer 7

bundles of muscle fibers

Question 8

sarcolemma

Answer 8

cell membrane of a muscle fiber

Question 9

sarcoplasm

Answer 9

cytoplasm of muscle fiber

Question 10

sarcoplasmic reticulum

Answer 10

membranous structure surrounding each myofibril

Question 11

sarcomere

Answer 11

contractile units of muscle

Question 12

motor unit

Answer 12

all muscle cells controlled by a single motor neuron

Question 13

Thin filaments are made of ___

Answer 13

actin

Question 14

Thick filaments are made of ___

Answer 14

myosin

Question 15

I bands contain ____

Answer 15

Only thin filaments

Question 16

I band location

Answer 16

End of one A band to the next

Question 17

A bands contain ___

Answer 17

thin and thick filaments

Question 18

A band location

Answer 18

length of thick filament

Question 19

M line location

Answer 19

center of the A band

Question 20

M line function

Answer 20

proteins help stabilize thick filaments

Question 21

H band location

Answer 21

either side of the M line

Question 22

H band contains ___

Answer 22

thick filaments only

Question 23

Z line consists of ___

Answer 23

protein actinis

Question 24

Z line function

Answer 24

interconnect thin filaments of adjacent sarcomeres

Question 25

Titin location

Answer 25

extends from thick filaments to Z line

Question 26

Titin function

Answer 26

keeps thick and thin filaments aligned, helps restore resting sarcomere length after contraction

Question 27

Myofilament function

Answer 27

responsible for muscle contraction

Question 28

sarcoplasmic reticulum function

Answer 28

helps transmit action potential to myofibril

Question 29

terminal cisternae

Answer 29

SR chambers attached to T tubule

Question 30

Cisternae function

Answer 30

concentrate Ca2+ and release Ca2+ into sarcomeres

Question 31

tropomyosin function

Answer 31

prevents actin-myosin interaction

Question 32

troponin function

Answer 32

binds tropomyosin to G-actin

Question 33

F-actin function

Answer 33

binds to myosin

Question 34

F-actin

Answer 34

twisted rows of G-actin

Question 35

origin

Answer 35

stationary or less moveable attachment

Question 36

insertion

Answer 36

moveable attachment

Question 37

agonist

Answer 37

produces a particular movement

Question 38

fixator

Answer 38

immobilizes origin of an agonist so tension is exerted at the insertion

Question 39

synergist

Answer 39

reduces unnecessary movement

Question 40

antagonist

Answer 40

opposes or reverses a movement

Question 41

CNS consists of ___

Answer 41

spinal cord and brain

Question 42

CNS functions

Answer 42

process and coordinate sensory data, motor commands, brain functions

Question 43

PNS consists of ___

Answer 43

all neural tissue outside the CNS

Question 44

PNS functions

Answer 44

deliver sensory info to CNS

Question 45

Afferent division

Answer 45

CNS

Question 46

Efferent division

Answer 46

peripheral tissues

Question 47

SNS function

Answer 47

controls voluntary and involuntary muscle contractions

Question 48

ANS function

Answer 48

controls subconscious actions

Question 49

Sympathetic division function

Answer 49

stimulating effect

Question 50

Parasympathetic division function

Answer 50

relaxing effect