Physiology Lab Exam Ii

Front 1

what does autorhythmic mean?

Back 1

like the mammalian heart it will continue to beat if removed from the body

Front 2

are heart muscle contrations dependent upon the brain?

Back 2

no

Front 3

what is the pacemaker of the heart and how does it communicate

Back 3

SA node via gap junctions

Front 4

true or false. the cardiac cycle invovles a sequential contratction of the atria and the ventricles

Back 4

true

Front 5

what is it called wihen arterial pressure is at its lowest point during the cardiac cycle

Back 5

diastolic pressure

Front 6

what is systolic pressure

Back 6

blood entering the arterial system inflates the arteries a little and increases blood pressure to a max

Front 7

when is the lub sound

Back 7

early phase of vntricular congtraction by closing of the AV valves

Front 8

when is the dub sound

Back 8

semlinuar valves close

Front 9

what is the equation for heart rate BPM

Back 9

BPM = 60sec/sec/beat

Front 10

what balances the intermittent ejection of blood into the arteries

Back 10

constant loss of blood from the arteries to the capillaries

Front 11

when is systolic pressure

Back 11

at hgihtest level or ventricle contractions

Front 12

when is diastolic pressure

Back 12

at loweest level prior to pumpin gof blood into the arteries

Front 13

when is the first sound in bp

Back 13

when the systolic pressure is greater than the cuff

Front 14

pulse pressure =

Back 14

systolic-diastolic

Front 15

mean arterial pressure MAP =

Back 15

diastlic + 1/3 pulse pressure

Front 16

what determines the stiffness of the arterial wall

Back 16

thickenss smooth muscle tone and age

Front 17

what is the effect of cooling on periphjeral ciruclation

Back 17

vasoconstriction increases bp
slowed circulation decreases bp

overall increased bp

Front 18

define respiration

Back 18

the process by which the body obtains and utilizes oxygen and produces and eliminates carbon dioxidde

Front 19

the movement of gases between the lung ands the environment

Back 19

pulmonary ventilation

Front 20

what are the fire parts of respiration

Back 20

ventilation
gas exhcange
gas transport
gas exchange
cellular respiration

Front 21

what factos influence diffusion

Back 21

surface are
diffusion distance
conc gradient

Front 22

;how is inspiration achieved

Back 22

by contraction of the diaphramgma dn intercostal mucles which increase the volume of the thoracic cavity

Front 23

where is the respiration center of the brain

Back 23

the medulla

Front 24

during times of increased demand, the ____ _____ can be increased to use some extra reserve in the lungs for air

Back 24

tidal volume

Front 25

what else can be changed after exercise to increase air exhange

Back 25

increase rate

Front 26

breathing rate =

Back 26

60/mean duration

Front 27

what are five things that the kidney regulates

Back 27

Water
Waste
Foreign chemicals
Gluconeogensis
Hormones and enzymes

Front 28

how much plasma is filtered per day

Back 28

180

Front 29

what shoudl urine include

Back 29

water waste urea catabolism of protein muscle creatine end products of hemoglobin breakdown such as bilirubin

Front 30

what shoudl NOT be in urine

Back 30

glucose proteins aa blood

Front 31

how can you tell renal disease

Back 31

protine

Front 32

how can you tell edema

Back 32

no sodium excreted

Front 33

how can you tell profound renal malfunction

Back 33

uremia

Front 34

what is normal BGL

Back 34

70 to 120

Front 35

high specific gravity =

Back 35

dehydration

Front 36

what is a motor unit

Back 36

a notorneuron and all the muscle fibers that it innervates

Front 37

why do muscles attach near the joints

Back 37

so that a small contractgi nproduces a large movement