Chapter 10 (Part 3)

Question 1

Where is cardiac muscle found?

Answer 1

myocardium

Question 2

What are the function of cardiac muscle?

Answer 2

propel blood out of heart, maintain blood pressure

Question 3

What is the shape of cardiac muscle?

Answer 3

short branched, striated

Question 4

How many nuclei do cardiac muscle have?

Answer 4

1-2

Question 5

Specialized junctions in cardiac muscle

Answer 5

intercalated disc

Question 6

What nervous system controls cardiac muscle?

Answer 6

autonomic

Question 7

Where are smooth muscles found?

Answer 7

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

Question 8

What are the functions of smooth muscle along hollow organs?

Answer 8

mix material, strengthen organ, propel material

Question 9

what are the functions of smooth muscle along passageways?

Answer 9

control diameter, propel material, breakdown material, regulate passageway

Question 10

what is the shape of smooth muscle?

Answer 10

wide middle with tapered ends

Question 11

how many nuclei do smooth muscle have?

Answer 11

1

Question 12

Location where intermediate filaments interact with the sarcoplasm

Answer 12

dense bodies

Question 13

location where intermediate filaments attach to sarcolemma

Answer 13

Dense plaques

Question 14

What nervous system are smooth muscle controlled by?

Answer 14

autonomic

Question 15

fibers receive stimulation to contract individually

Answer 15

multiunit smooth muscle

Question 16

where are multiunit smooth muscle found?

Answer 16

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

Question 17

Fibers stimulated to contract in unison

Answer 17

Single unit smooth muscle

Question 18

Where are single unit smooth muscle found?

Answer 18

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

Question 19

Invagination of sarcoma with SR contacting it

Answer 19

caveolae

Question 20

Allow contraction to be signaled using different modalities

Answer 20

Sparse SR

Question 21

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

Answer 21

Latchbridge mechanism