Ziolo Questions

Question 1

Upstroke of SA nodal cell action potential occurs via

Answer 1

Opening of calcium

Question 2

The ventricles contract after atria because

Answer 2

slow conduction of the AV node. Allows atria to contract to have atrial kick.

Question 3

What happens if you knock out AV node

Answer 3

Ventricles still contract because the conduction cells have the pacemaker potential.

Question 4

What channel is in all of the conduction cells

Answer 4

funny

Question 5

Calcium triggered calcium release

Answer 5

occurs after depolarization in plateau phase- EC coupling.

Question 6

Flow =

Answer 6

change in pressure/ resistance

Question 7

MAP -

Answer 7

CO*TPR

Question 8

CO =

Answer 8

Stroke volume * HR

Question 9

1. The resistance to flow is inversely proportional to the square root of the radius
   a) True
   b) False

Answer 9

false

Question 10

1. Flow is determined by which of the following calculations:
   a) Flow= pressure/resistance
   b) Flow= resistance/pressure
   c) Flow= radius/length
   d) Flow= (delta)pressure/resistance
   e) Flow= (delta)resistance/pressure

Answer 10

d

Question 11

1. The major site for resistance to flow is:
   a) Arteries
   b) Arterioles
   c) Aorta
   d) Venules
   e) Veins

Answer 11

b

Question 12

1. The hematocrit of a patient with a plasma volume of 4 liters and a total blood volume of 10 liters is:
   a) 30%
   b) 40%
   c) 50%
   d) 60%
   e) Can’t be calculated from the information provided

Answer 12

d

Question 13

1. The 3 chemical classes of hormones are:
   a) Peptides, Steroids, amines
   b) Thyroids, Catecholamines, dopamine
   c) Estrogens, androgens and progestones
   d) Glucocorticoids, mineralocorticoids, amines

Answer 13

a

Question 14

1. Peptide hormones stimulate cholesterol esterase to release cholesterol from storage
   a) T
   b) F

Answer 14

T

Question 15

1. This protein shuttles free cholesterol to the mitochondria
   a) Cytochrome C
   b) P53
   c) Cholesterol esterase
   d) Steroid acute regulatory protein (StAR)

Answer 15

d

Question 16

1. All amine hormones are derived from this amino acid:
   a) Guanine
   b) Tyrosine
   c) Ryanodine
   d) Thymidine

Answer 16

b

Question 17

1. This hormone converts androstenedione to testosterone
   a) 17-hydroxysteroid dehydrogenase
   b) DHEA
   c) Aromatase
   d) Cholesterol esterase

Answer 17

a

Question 18

1. This hormone converts testosterone to estradiol
   a) 17-hydroxysteroid dehydrogenase
   b) DHEA
   c) Aromatase
   d) Cholesterol esterase

Answer 18

c

Question 19

1. Steroid hormones are capable of being stored in lipophilic vacuoles
   a) T
   b) F

Answer 19

f

Question 20

1. Which inputs control hormone secretion?
   a) changes in plasma concentration of ion or nutrient that the hormone regulates
   b) neural input to endocrine cells (autonomic or brain neurons)
   c) tropic hormones
   d) A and B
   e) All of the above

Answer 20

e

Question 21

Increased adenosine in a metabolically controlled organ will cause:

Answer 21

vasodilation

Question 22

Increase in map can be caused by

Answer 22

D) Can be caused by an increased total peripheral resistance

Question 23

Increasing map increases

Answer 23

organ blood flow

Question 24

Increase of map will increase capillary

Answer 24

filtration