21

Question 1

Tunica interna (intima

Answer 1

– inner layer
* Has simple squamous
* Slick lining- no stick
* Selectively permeable barrier

Question 2

artieries are called resistence vessles bc

Answer 2

withstand high BP

Question 3

capavitance vessles

Answer 3

veins
contain most of our blood

Question 4

capillaries

Answer 4

micro vessles connecting small arteries to small veins

Question 5

Tunica media –

Answer 5

middle layer
* Thick layer
smooth muscle, collagen, maybe elastin
* vasoconstriction and vasodilation (close and open)

Question 6

Tunica externa (adventitia) –

Answer 6

outer layer
* Loose connective tissue
* Anchors vessel to its surroundings

Question 7

vaso vasorum

Answer 7

Large vessels have their own network of small vessels

Question 8

dsitributing artieries have

Answer 8

elastic lamina

Question 9

tunica interna

Answer 9

little valve in vein to prevent backflow of blood to feet

Question 10

Conducting (elastic) arteries

Answer 10

– biggest
arteries
* Ex: aorta

Question 11

Distributing (muscular) arteries –

Answer 11

midsized
* Ex: femoral a.

Question 12

Resistance arteries

Answer 12

– smallest arteries
* Less than 0.1 mm in diameter
* Arterioles are smallest examples

Question 13

Metarterioles

Answer 13

– short vessels linking
arterioles and capillaries

Question 14

baroreceptor

Answer 14

Send signals to the vasomotor and cardiac center (medulla o) of the brain
changes diamter of vessles/heart rate

Question 15

Chemoreceptor

Answer 15

Send signals to the respiratory centers of the brain (pons or med o)
monitors blood comp
alts respiratory rate

Question 16

shit monitored in blood

Answer 16

PH, CO2, O2

Question 17

Baroreceptors

Answer 17

aortic sinus
carotid sinuses

Question 18

Aortic sinus

Answer 18

• Innervated by vagus nerve
  to heart

Question 19

Carotid sinuses

Answer 19

to brain
* Innervated by glossopharyngeal
nerve

Question 20

Chemoreceptors

Answer 20

– Carotid bodies

– Aortic bodies

Question 21

– Carotid bodies

Answer 21

• Innervated by glossopharyngeal
  nerve

Question 22

– Aortic bodies

Answer 22

• Innervated by vagus nerve

Question 23

Arterial Pressure Points

Answer 23

high pressure in aorta
low pressure in veins

Question 24

Continuous capillary –

Answer 24

endothelial cells joined by
tight junctions,
some intercellular clefts present (space bn cells)

Question 25

Fenestrated capillary –

Answer 25

endothelial cells have
filtration pores facilitating
exchange (small molecules yasssss)
have clefts

Question 26

Sinusoid

Answer 26

(discontinuous
capillary) –
irregular, tortuous passages with wide
gaps between endothelial cells
in liver

Question 27

capillary exchange ways

Answer 27

filteration (pores)
transcytosis (across cell)
diffusion
intercellualr clefts

Question 28

filteration diffusion for

Answer 28

electrolytes

Question 29

transcytosis exchnage for

Answer 29

hormones

Question 30

diffusion exchange for

Answer 30

o2 and co2

Question 31

intercellular cleft exchange for

Answer 31

medium size molecule like glucose

Question 32

precap sphincters

Answer 32

close off passage and stuff idk idk
will close to conserve energy and heat

Question 33

types of veins

Answer 33

postcapillary venules
muscular venules
medium veins
venous sinuses

Question 34

postcap venules

Answer 34

15 μm to 1mm diameter

Question 35

muscular veins

Answer 35

greater than 1mm diameter valves starts to show up

Question 36

Medium veins:

Answer 36

up to 10 mm diameter
* Venous valves

Question 37

Venous sinuses:

Answer 37

large lumens

Question 38

Skeletal Muscle Pump