Physiology 1

Question 1

Glucose and amino acids use what type of diffusion?

Answer 1

Facilitated

Question 2

TQ: What type of neuron transmits an action potential the fastest?

Answer 2

Large, myelinated neuron

Question 3

TQ: Saltatory conduction is characteristic of which part of a typical neuron?

Answer 3

Axon

Question 4

TQ: How much more compliant are veins than arteries?

Answer 4

24 times

Question 5

TQ: What is the mean circulatory filling pressure when the blood volume is 4L and 5L, respectively?

Answer 5

4L = 0
5L = 7 mmHg

Question 6

TQ: What cells reabsorb Na+ and H2O and secrete K+?

Answer 6

Principal cells

Question 7

TQ: What cells reabsorb K+ and secrete H+?

Answer 7

Intercalated cells

Question 8

TQ: Phosphate buffer system plays a major role in buffering _____ and intracellular fluids.

Answer 8

Renal tubular fluid

Question 9

TQ: What establishes the ramp signal during normal breathing?

Answer 9

Dorsal respiratory group

Question 10

TQ: What mainly controls the rate and depth of breathing in the pontine respiratory group?

Answer 10

Pneumotaxic center

Question 11

What respiratory group is associated with internal intercostals and other muscles used for forced expiration?

Answer 11

Ventral respiratory group

Question 12

In a slow action potential, what is the upstroke due to?

Answer 12

Ca++

Question 13

Lead 1 has two electrodes on two arms and a direction of _____˚.

Answer 13

0˚

Question 14

Lead 2 has electrodes on the right arm and left leg and a direction of _____˚.

Answer 14

60˚

Question 15

Lead 3 has electrodes on the left arm and left leg and a direction of _____˚.

Answer 15

120˚

Question 16

_____% of blood is in the veins, _____% is in the arteries, and _____% is in the arterioles and capillaries.

Answer 16

Veins: 64%
Arteries: 13%
Capillaries: 7%

Question 17

Veins are about _____ times more distensible than arteries.

Answer 17

8 times

Question 18

What are the two major problems of left heart failure?

Answer 18

Pulmonary vascular congestion

Pulmonary edema

Question 19

What is the daily glomerular filtration rate?

Answer 19

180 L/day

Question 20

What has the greatest effect on increasing glomerular filtration rate?

Answer 20

Glomerular hydrostatic pressure

Question 21

T/F: The thick, ascending segment of the loop of henle is permeable to water.

Answer 21

False, impermeable

Question 22

The distal tubule is impermeable to _____ and _____.

Answer 22

Water and urea

Question 23

T/F: High ADH levels causes more water to be reabsorbed from the lumen into the tubule.

Answer 23

True

Question 24

Absence of aldosterone causes _____ disease while hypersecretion causes _____ syndrome.

Answer 24

Addison’s disease

Conn’s syndrome

Question 25

T/F: Angiotensin II returns BP and extracellular volume toward normal by decreasing Na+ and H2O reabsorption.

Answer 25

False, increasing reabsorption

Question 26

Increased ventilation is due to _____ while decreased ventilation is due to _____.

Answer 26

Metabolic Acidosis

Metabolic Alkalosis

Question 27

What functions to limit lung expansion?

Answer 27

Apneustic center