the heart part 2

Question 1

describe the structure of the blood vessels

Answer 1

tunica adventitia
tunic media
tunica intima

Question 2

define tunica adventitia

Answer 2

outer layer of fibrous tissue, collagen and connective tissue. protects and supports vessel

Question 3

describe the tunica media

Answer 3

middle layer contains smooth muscle and elastic tissue

Question 4

describe tunica intima

Answer 4

smooth lining only one cell thick

Question 5

describe function and structure of arteries

Answer 5

thicker to withstand higher blood pressure
lots of elastic tissue and little smooth muscle allows it to stretch and absorb pressure wave from heartbeat and as i recoils squeeze the blood and push it foward

Question 6

describe function and structure of arterioles

Answer 6

contain mostly smooth muscle
systemic blood pressure determined by resistance of arterioles at which blood flows at

Question 7

describe function and structure of capillaries

Answer 7

single layer of endothelial cells on a thin basement membrane
site of gas exchange between blood and tissue fluid
oxygenated to tissues and metabolic waste into bloodstream

Question 8

describe structure and function of venules

Answer 8

low blood pressure
thinner walls
deoxygenated blood

Question 9

describe structure and function of veins

Answer 9

valves to prevent backflow
stretch to hold a large proportion of the body’s blood
low blood pressure

Question 10

describe the role of valves and skeletal muscles in the return of blood to the heart

Answer 10

ensure one-way flow back to the heart

Question 11

define the major points for palpation

Answer 11

temporal artery, facial artery common carotid artery, femoral, popliteal, brachial, radial, posterior tibial, dorsalis pedis

Question 12

define pulse

Answer 12

a rhythmical throbbing of arteries

Question 13

define blood pressure

Answer 13

the force exerted on the wall of a blond vessel by the contained blood

Question 14

describe how the pressure changes as blood travels from arteries to the venous system

Answer 14

arteries is high blood pressure then in arterioles its high
then capillaries is high
venules and veins its low blood pressure

Question 15

define hypertension

Answer 15

high blood pressure

Question 16

define hypotension

Answer 16

low blood pressure

Question 17

define normotension

Answer 17

normal range

Question 18

define postural hypotension

Answer 18

drop in blood pressure when you stand up after lying or sitting down

Question 19

define heart rate

Answer 19

number of beats per minute

Question 20

define cardiac output

Answer 20

volume of blood pumped by each ventricle per minute

Question 21

define stroke volume

Answer 21

amount of blood leaving each ventricle during one contraction

Question 22

define tachycardia

Answer 22

a heart rate over 100 bpm

Question 23

define bradycardia

Answer 23

a heart rate below 60 bpm

Question 24

define sinus rhythm

Answer 24

heart rate between 60-100 bpm