Exam 3 old exams

Question 1

Na can be passively absorbed at the

Answer 1

Ascending loop of Henle

Question 2

Conducting arteries

Answer 2

Has a tunica media that has more elastic connective tissue than smooth muscle
Are responsible for absorbing the pulses of blood, smoothing out the pressure and pushing the blood on

Question 3

The Haldane effect

Answer 3

Promotes CO2 unloading from the deoxyhemoglobin at the lungs

Question 4

Ventricular systole

Answer 4

Occurs concurrently with atrial diastole

Question 5

Carbonic anhydrase

Answer 5

Promotes the creation of CO2 and H2O

Question 6

In systemic circ., blood flow rate is ____ at the ____ and blood pressure is ____ at the _____

Answer 6

slowest at capilaries, lowest at veins

Question 7

Angiotensin II

Answer 7

Directly increases BP by vasoconstriction AND stimulates ADH secretion

Question 8

Increased erythropoietin

Answer 8

causes an increase in blood volume

Question 9

contractile cardiac muscle cells

Answer 9

when depolarized, cause VR Ca channels to open which then causes more Ca to be released from SR

Question 10

Normal EXPIRATION occurs because

Answer 10

A subset of VRG neurons send inhibitory signals to the excitatory VRG neurons to stop their firing and sending impulses to the diaphragm

Question 11

Glomerular filtration rate can be determined

Answer 11

by measuring levels of creatine in the urine (plasma)

Question 12

An EKG’s P wave is recording the electrical evens that leads to

Answer 12

atrial systole

Question 13

CO2 LEAVING blood stream

Answer 13

Aveoli > Aveolar sac > alveolar duct > Respiratory bronchiole > terminal bronchiole > secondary bronchi > trachea > laryngeopharynx > oropharnyx

Question 14

Arteries differ from veins in the following ways

Answer 14

higher hydrostatic pressure

Question 15

Cardiac conductive cell’s repolariziation is due to

Answer 15

K channels

Question 16

Decrease in afterload

Answer 16

increases SV

Question 17

INTRINSIC regulation of glomerular filtration rate includes

Answer 17

1. myogenic responses of the smooth muscle at the afferent artier (when bP increases, smooth muscle contracts)
2. Nacula dense cells sense NaCl concentrations in the ascending limb and release chemicals to change diameter of afferent arteriole (ATP)

Question 18

Normal hydrostatic pressure of blood entering a capillary bed

Answer 18

is higher than the bloods normal osmotic pressure

Question 19

EDV is most proximately influenced by

Answer 19

Increase in VENOUS return

Question 20

If plasma levels of O2 were 70 Torr, you would expect that

Answer 20

not to change respiration

Question 21

ACE inhibitors

Answer 21

cause a general decrease in blood pressure

Question 22

The Bohr effect

Answer 22

Causes O2 to be released from Hb at a higher partial pressure, and occurs when Hb encounters low conditions

Question 23

HR decreases when

Answer 23

The parasympathetic nervous system slows the prepotential depolarization rate

Question 24

hypertension can be treated by using beta 1 agonists, which decrease sv

Answer 24

FALSE

Question 25

Solutes are reabsorbed at the proximal convoluted tubule by

Answer 25

active transport of the specific solutes

Question 26

When there is increased preload

Answer 26

Stretching of atria cells irritates SA node, making it depolarize more quickly

Question 27

A pneumothorax occurs

Answer 27

When the negative pressure difference between the lungs and plural cavity are disrupted

Question 28

A pneumothorax occurs

Answer 28

When the negative pressure difference between the lungs and plural cavity are disrupted

Question 29

Filtration occurs at the nephron because of

Answer 29

The presence of fenestrated capillaries of the glomerulus

Question 30

O2/CO2 gas exchange occurs

Answer 30

At the respiratory membrane

Question 31

The Frank-Starling effect

Answer 31

Increases ventricular contraction strength because increased EDV positions the myofilaments in cardiac sarcomeres in more optimal configurations

Question 32

Transport max mechanisms limits indicates that

Answer 32

There are threshold amounts of specific solutes that symport pumps can clear from the filtrate

Question 33

Renal pyramids

Answer 33

Are where you find the loops of hence of juxtaglomer. nephrons and collecting ducts
AND
are where you find a large gradient of renal osmolality

Question 34

The AV node

Answer 34

is the site where the AP of the atria get resynchronized

Question 35

The oxygen dissociation curve of Hb would shift

Answer 35

right if there were high levels of plasma H

Question 36

Vital capacity is equal to

Answer 36

Represents ERV+IRV+TV

Question 37

Hypotension

Answer 37

can become shock if extensive vasodilation occurs

Question 38

decreased glomerular blood pressure

Answer 38

causes a decrease in glomerular filtration rate which results in less urine productiono

Question 39

Diuretic drugs work by

Answer 39

inhibiting the action of aldosterone

Question 40

the reason the atria and ventricles are not in systole at the same time is

Answer 40

1. presence of the skeleton of the heart

2. 0.1s delay at the AV node

Question 41

When K is inhibitory bitter from being secreted into the renal filtrate

Answer 41

urine volume increases

Question 42

ANP

Answer 42

inhibits aldosterone