Chapter 10 (Part 3) Flashcards Preview

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Flashcards in Chapter 10 (Part 3) Deck (21):
1

Where is cardiac muscle found?

myocardium

2

What are the function of cardiac muscle?

propel blood out of heart, maintain blood pressure

3

What is the shape of cardiac muscle?

short branched, striated

4

How many nuclei do cardiac muscle have?

1-2

5

Specialized junctions in cardiac muscle

intercalated disc

6

What nervous system controls cardiac muscle?

autonomic

7

Where are smooth muscles found?

Walls of hollow organs, along passageways, internal sphincters, arrector pili, iris

8

What are the functions of smooth muscle along hollow organs?

mix material, strengthen organ, propel material

9

what are the functions of smooth muscle along passageways?

control diameter, propel material, breakdown material, regulate passageway

10

what is the shape of smooth muscle?

wide middle with tapered ends

11

how many nuclei do smooth muscle have?

1

12

Location where intermediate filaments interact with the sarcoplasm

dense bodies

13

location where intermediate filaments attach to sarcolemma

Dense plaques

14

What nervous system are smooth muscle controlled by?

autonomic

15

fibers receive stimulation to contract individually

multiunit smooth muscle

16

where are multiunit smooth muscle found?

iris, arrector pili, larger arteries, large passageways for respiratory system

17

Fibers stimulated to contract in unison

Single unit smooth muscle

18

Where are single unit smooth muscle found?

Wales of digestive, urinary, reproductive tracts, most blood vessels

19

Invagination of sarcoma with SR contacting it

caveolae

20

Allow contraction to be signaled using different modalities

Sparse SR

21

Myosin heads have modifications that allow them to latch onto actin and remain attached without using additional ATP

Latchbridge mechanism