skeletal muscle

Question 1

sarcolemma

Answer 1

plasma membrane

Question 2

myofibrils

Answer 2

Cylindrical unit of protein occupying most of the internal space of each muscle fiber

Question 3

sarcoplasm

Answer 3

the fluid within the muscle fiber

Question 4

mitochondria

Answer 4

ATP synthesis

Question 5

sarcoplasmic reticulum

Answer 5

similar to smooth ER
surrounds the myofibrils

Question 6

myofilaments

Answer 6

threadlike units of proteins

Question 7

what are thick myofilaments composed of

Answer 7

myosin

Question 8

what are thin myofilaments composed of

Answer 8

actin, troponin, tropomyosin

Question 9

sarcomeres

Answer 9

contractile units
found between two z disc

Question 10

z disc

Answer 10

provides anchorage for thin myofilaments

Question 11

I band

Answer 11

surrounds z disc
light bands
zone for thin myofilaments

Question 12

A band

Answer 12

dark band
thick myofilaments

Question 13

H zone/band

Answer 13

middle of A band

Question 14

M line

Answer 14

middle if H zone
where thick myofilaments are anchored

Question 15

transverse (T) tubule

Answer 15

at each junction of the A band and I band
enters the sarcoplasmic reticulum

Question 16

terminal cisternae

Answer 16

enlarged areas if the sarcoplasmic reticulum that surrounds the T tubule

Question 17

triad

Answer 17

a single T tubule with two terminal cisternae on each side

Question 18

endomysium

Answer 18

thin sheet of areolar connective tissue enclosing each individual muscle fiber

Question 19

perimysium

Answer 19

tougher sheet that surrounds groups of fibers

Question 20

fascicle

Answer 20

muscle bundle

Question 21

epimysium

Answer 21

collagenous dense connective tissue covering the fascicle and envelops the whole muscle

Question 22

tendon

Answer 22

band of dense regular tissue

Question 23

aponeurosis

Answer 23

a broad sheet like tendon

Question 24

neuromuscular junction

Answer 24

stimulus is passed from a motor neuron to muscle fibers to begin the contraction sequence

Question 25

axon terminal

Answer 25

form a neuromuscular junction with a single muscle fiber

Question 26

motor unit

Answer 26

when motor neuron and all the muscle fibers form

Question 27

synaptic knobs

Answer 27

when the axon terminal divides at the neuromuscular junction

Question 28

synaptic vesicles

Answer 28

within each synaptic knob
contains neurotransmitter molecules

Question 29

synaptic cleft

Answer 29

separated the synaptic knob and the sarcolemma of the muscle

Question 30

motor end plate

Answer 30

the sarcolemma with a abundance of receptor molecules embedded in the membrane

Question 31

acetylcholine (ACh)

Answer 31

a neurotransmitter chemical that is released from synaptic vesicles in the synaptic knob