muscle tissue W4 (cardiac)

Question 1

cardiac muscle is triated? or unstriated?

Answer 1

striated

Question 2

how many nuclei does an individual cardiac muscle cell have

Answer 2

one, sometimes two

Question 3

cardiac muscle cells branch, why?

Answer 3

so they can contact several other cells

Question 4

what types of cell junctions are present between cardiac muscle cells

Answer 4

adhering and communicating

Question 5

where are adhering and communicating cell junctions found

Answer 5

in specialised structures called intercalated disks

Question 6

cardiac muscle cells are innervated by the ….

Answer 6

autonomic nervous system

Question 7

cardiac muscle cells - 50% of cytoplasm is taken up by …

Answer 7

mitochondria

Question 8

the presence of lots of mitochondria in cardiac muscle cells implies what about cardiac tissue

Answer 8

it is a highly energetic tissue

Question 9

cordiac tissue contains lot? or not many? capilaries

Answer 9

lots of capillaries

Question 10

when a tissue contains lots of capilaries it is refered to as…

Answer 10

highly vascular

Question 11

each cardiac cell is lined by a layer of ….. CT called …..

Answer 11

loose

endomysium

Question 12

what causes the striated appearance of cardiac muscle cells

Answer 12

arrangement of thick and thin filaments in the myofibrils within cardiac muscle cells

Question 13

in comparison to skeletal muscle cells, cardiac muscle cells have less? more? sacroplasmic reticulum?

Answer 13

much less

Question 14

do cardiac muscle cells have t tubules

Answer 14

yes

Question 15

cardiac muscles have diads, what are they composed of ?

Answer 15

one t tubule and one cistern of sacroplasmic reticulum

Question 16

in caparison to skeletal muscle tissue, cardiac muscle tissue relies more/less? heavily extracellular calcium?

Answer 16

more

Question 17

what is the a vague cause of coronary artery disease

Answer 17

a narrowing of arteries which supply oxygen to cardiac muscle cells

Question 18

whats anothery name for cardiac muscle cells

Answer 18

cardiomyocytes

Question 19

what are intercalated disks

Answer 19

junctions between cells which anchor cadiomyocytes

Question 20

what are is the role of desmosomes in intercalated disks between cardiac muscles

Answer 20

prevent cells from separating during contraction

Question 21

what is the role of gap junctions in intercalated disks between cardiomyocytes

Answer 21

they allow ions to pass from cell to cell

Question 22

gap junctions are only found in …..muscle

Answer 22

cardiac