Muscle

Question 1

What are the three types of muscle

Answer 1

skeletal, cardiac, smooth

Question 2

Which muscle is fatigue resistant

Answer 2

smooth

Question 3

What is epimysium

Answer 3

tough connective tissue

Question 4

What does epimysium surround

Answer 4

outside of whole muscle

Question 5

What is perimysium

Answer 5

connective tissue sheath

Question 6

What does perimysium surround

Answer 6

bundles of myocytes - fasicles

Question 7

What surrounds skeletal muscle

Answer 7

different fibrous tissues

Question 8

Describe the characteristics of skeletal muscle

Answer 8

multi-nucleate, long unbranched, striated

Question 9

What are transverse tubules

Answer 9

gaps between sarcoplasmic reticulum

Question 10

What are dense irregular connective tissues

Answer 10

epimysium, perimysium

Question 11

what is endomysium

Answer 11

thin connective tissue

Question 12

What does endomysium surround

Answer 12

each myocyte

Question 13

How does skeletal muscle contract

Answer 13

under voluntary control

Question 14

What is the sarcolemma

Answer 14

Plasma membrane around muscle

Question 15

What do invaginations of the sarcolemma form

Answer 15

transverse tubules

Question 16

What is the sarcolemma comprised of

Answer 16

cisterns and t-tubules

Question 17

What is the function of the sarcolemma

Answer 17

calcium store

Question 18

Describe smooth muscle

Answer 18

single nucleus, unbranched, X striations

Question 19

What is the contraction of smooth muscle

Answer 19

involuntary

Question 20

What is present in smooth muscle

Answer 20

actin, myosin inbetween Z bodies

Question 21

What is the structure of cardiac muscle

Answer 21

striated, intercalated discs

Question 22

What are intercalated discs

Answer 22

biological rivets

Question 23

Describe cardiac myocytes

Answer 23

functional syncytium

Question 24

How do cardiac myocytes contract?

Answer 24

rapid succession, contract large population of cells at once

Question 25

What makes up skeletal and cardiac muscle

Answer 25

filaments - myosin, actin

Question 26

What are the bands in sarcomeres

Answer 26

Z, A and I

Question 27

What is the I band

Answer 27

light, actin only

Question 28

What is the A band

Answer 28

dark, actin and mysoin

Question 29

What is the functional unit of a filament

Answer 29

sarcomere

Question 30

What is myosin made of

Answer 30

light and heavy molecular weight meromyosin

Question 31

What does tropomyosin wrap around

Answer 31

F actin

Question 32

What happens when calcium interacts with troponin

Answer 32

conformational shape change - exposes binding site

Question 33

Describe cytosolic calcium levels

Answer 33

low

Question 34

What do action potentials release from the sacroplasmic reticulum

Answer 34

calcium

Question 35

What does the presence of calcium and ATP prevent

Answer 35

continual muscle contraction