2. MUSCLE

Question 1

three types of muscle

Answer 1

1. skeletal muscle
2. cardiac muscle
3. smooth muscle

Question 2

skeletal muscle

Answer 2

tubular shape
peripheric nuclei
multinuclear
voluntary, storng
can be repaired

Question 3

cardiac muscle

Answer 3

branched
intercalated discs
involuntary, strong
heart
striated
can’t be repaired, are replaced by fibres

Question 4

smooth muscle

Answer 4

fusiform shape
not striated
involuntary
weaker contractions
non-striated (BV and gut)

Question 5

epimysium

Answer 5

surrounds muscle

Question 6

perimysium

Answer 6

surrounds fascicle

Question 7

endomysium

Answer 7

surrounds muscle cell

Question 8

tendon

Answer 8

connects muscle to bone
help prevent injury

Question 9

what do the capillaries of skeletal muscle do?

Answer 9

bring O2 + nutrients in
removes CO2 + waste

Question 10

myotendinous junction is the interface between ____ & ______

Answer 10

muscle and tendon

Question 11

myotendinous junction

Answer 11

prevents damage
transmission of contractile strength from muscle to tendon

Question 12

myofibril

Answer 12

long series of sacromeres

Question 13

thin filaments

Answer 13

actin filaments

Question 14

thick filaments

Answer 14

bundles of myosin

Question 15

titin

Answer 15

giant protein; passive elasticity of muscle

Question 16

events of the sliding filament theory

Answer 16

1. depolarization and calcium ion release
2. actin and myosin cross-bridge
3. sliding mechanism of actin and myosin filaments
4. sacromere shortening

Question 17

a band (anisotopic)

Answer 17

dark part –> never moves

Question 18

i band (isotropic)

Answer 18

light part–> moves

Question 19

what does contraction need first before it can happen?

Answer 19

nerve impulse

Question 20

how does the neuromuscular junction work?

Answer 20

action potential–> runs into the muscle fibre via T-tubules–> reach sacroplasmic reticulum–> activates calcium channels –> muscle contraction

Question 21

myogenic

Answer 21

creates its own rythm

Question 22

autorhythmic

Answer 22

controls how fast/slow contractions are

Question 23

what doesn’t stain well in cardiac muscles?

Answer 23

glycogen

Question 24

epicardium

Answer 24

between myocardium and pericardial cavity

Question 25

pericardium

Answer 25

outer layer of the heart

Question 26

what do purkinje fibres rely on?

Answer 26

glyocogen

Question 27

myocardium

Answer 27

the muscle part of the heart

Question 28

endocardium

Answer 28

serous membrane (inner layer of the heart)

Question 29

dense bodies

Answer 29

attachment point for intermediate filaments and thin filaments

Question 30

gap junctions

Answer 30

electrical coupling of cells. form a syncytium allowing contraction as a unit

Question 31

where are smooth muscle and cardiac muscle found?

Answer 31

viseral organs–> digestive tract, urinary tract (bladder)

Question 32

Smooth muscle myocytes _______.
A) have a central nucleus
B) lack a transverse (T)-tubular system
C) have a fusiform shape
D) All are correct.
E) lack sarcomeres

Answer 32

D

Question 33

cardiac muscle is myogenic T/F

Answer 33

true

Question 34

The perinuclear region (1) of cardiac myocytes ___________________.
A) all of these option
B) contains glycogen granules
C) containes lipid droplets
D) lack myofibrils
E) stains relatively poorly w H&E

Answer 34

A) all