Postlab quiz 10 Flashcards Preview

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Flashcards in Postlab quiz 10 Deck (151)
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1

Skeletal muscle does this

works with the skeletal system (bone) to produce movement

2

Connective tissue surrounding muscle

epimysium

3

A bundle of muscle cells is called this, and is surrounded in this

fasical
perimysium

4

Muscle cell name, and what it is surrrounded by

muscle fiber
endomysium

5

T/F: connective tissue is continuous with the tendon

t

6

Striations in the skeletal muscle reflect this

the arangement of the microfilaments within the muscle

7

T/F: skeletal muscles are multinucliate

T

8

Single muscle cells fuse togeather to form this type of structure

syncytium

9

T/F: muscle fibers are usually short

F, they can be very long (up to feet long)

10

T/F: skeletal muscle is involuntary

F

11

This provides the stimulus for skeletal movement

motor neurons from motor areas of the brain

12

Name for the synapse between motor neurons and muscle fibers

neuromuscular junction

13

The termiinus of the axon attaches to this on the muscle fiber

motor end plate

14

Neurotransmitter present in vesicles at the axon terminus

acetycholine

15

All muscle fibers innervated by a single neuron are called this

motor unit

16

Small motor units have this

very precise contractions
weak strength

17

large motor units have this

imprecise contractions
greater strength of contraction

18

Functional unit of the muscle fiber

sarcomere

19

The ends of the sarcomere are know as this

z lines (discs)

20

Thin filaments are known as

actin

21

thick filaments are known as

myosin

22

This is where only actin is present

I band

23

This is where we have both action and myosin

a band

24

This is where there is only myosin

h zone

25

myosin attaches to eachother at this spot

m line

26

This is known as the sliding filament theory

when the muscle contracts the z disks come closer togeather as a result of the actin and myosin sliding past eachother

27

The name for the connection between actin and myosin

crossbridge

28

During the power stroke this occurs

myosin head bend towards the m line

29

This provides energy for myosin to move from a relaxed state to a contracted state

ATP

30

This occurs when a person dies for this reason

Rigor Mortis
loss of ATP