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Histology Exam 1 > Muscle > Flashcards

Flashcards in Muscle Deck (31):
1

plasmalemma of the mucks cells, external to this cell membrane is a well developed basement membrane

sarcolemma

2

cytoplasm of muscle cells excluding myofibrils

sarcoplasm

3

smooth endoplasmic reticulum of muscle cells
- calcium storage and release

sarcoplasmic reticulum

4

thick layer of collagenous connective tissue that separates large bundles of muscle

epimysium

5

collagenous connective tissue that separates smaller bundles of muscle cells called fascicles

perimysium

6

bundle of muscle cells bounded by perimysium

fascicles

7

thinner layer of connective tissue that separates individual muscle cells

endomysium

8

voluntary muscle

skeletal muscle

9

skeletal muscle is generally connected to bone via a piece of connective tissue called a

tendon
DICT

10

another word meaning that each striated muscle cell contains multiple nuclei

syncytail

11

each individual muscle cell is called a

muscle fiber
or myofiber

12

actual contractile apparatus of muscles

sarcomere

13

the sarcomeres contain filaments of _____ and _____ that interact to cause contraction of muscle cells

actin and myosin

14

thin filaments

actin

15

thick filaments

myosin

16

area containing overlapping actin and myosin filaments except in H band region

A band
anisotropic band
dark

17

area of myosin filaments where there is no over lap of actin filaments

H band
zone

18

thin actin filaments + Z line
no myosin

I band
isotropic band
light

19

where actin filaments of adjacent sarcomeres are anchored

Z line

20

formed by connections between the central portions of adjacent myosin filaments

M line

21

the action potential causes the sarcoplasmic reticulum to release

Ca +2 ions

22

the muscle cells also contain ______ which is an oxygen binding protein similar to hemoglobin and has a high affinity for oxygen

myoglobulin

23

cardiac muscle are different from skeletal in what ways

1 nucleus
branched
centrally located nucleus
held together by intercalated disks
involuntary
shorter in length

24

specialized junctional complexes that bond cardiac muscle cells together

intercalated disks

25

macula adherens

desmosomes: hold cells together

26

where the myofilaments of the sarcomeres at the ends of myofibrils adhere to the sarcolemma. locate where myofilaments end at the muscle cell plasmamlemma

fascia (zonula) adherens

27

connecting between muscle cells that allow transfer of ions between them

gap junctions

28

smooth muscle cells are like fibroblasts in that they are able to synthesize

collagen, elastin and proteoglycans

29

in smooth muscle, contraction is much ___ organized and occurs ______ ______ than it does in skeletal or cardiac

less organized
more slowly

30

T/F: smooth muscles have a transverse tubule system

fasle
they don't have one

31

modified cardiac muscle cells mostly found in the ventricle that are specialized for conduction of electrical impulses.

pukinje fibers