Physio 1

Question 1

An electrocardiogram (ECG) of a 65/F revealed progressive lengthening of the PR interval followed by a “beat drop” of the QRS complex. What is the type of atrioventricular (AV) block seen in the patient?

A. 2nd degree AV block, Mobitz type I
B. 1st degree AV block
C. 3rd degree AV block
D. 2nd degree AV block, Mobitz type II

Answer 1

A. 2nd degree AV block, Mobitz type I

Question 2

What hormone is responsible for the inhibition of the myenteric plexus in the lower esophageal sphincter?

A. Cholecystokinin
B. Acetylcholine
C. Vasoactive intestinal peptide
D. Norepinephrine

Answer 2

C. Vasoactive intestinal peptide

Question 3

Which of the following parameters would increase the collapsing pressure of the alveoli?

A. Decrease in surface tension
B. Increase in lung surfactant
C. Decrease in the radius of the alveolus
D. Increase in alveolar compliance

Answer 3

C. Decrease in the radius of the alveolus

Question 4

What will be the effect of efferent arteriole constriction on glomerular filtration rate (GFR), renal plasma flow (RPF), and filtration fraction (FF)?

A. ↓ GFR, ↓ RPF, same FF
B. ↑ GFR, ↓ RPF, ↑ FF
C. ↓ GFR, same RPF, ↓ FF
D. ↑ GFR, same RPF, ↑ FF

Answer 4

B. ↑ GFR, ↓ RPF, ↑ FF

Question 5

What nucleus of the thalamus is responsible for relaying spinothalamic and dorsal column-medial lemniscal nervous signals to the primary somatosensory cortex?

A. Ventral posteromedial (VPM) nucleus
B. Lateral geniculate nucleus
C. Ventral posterolateral (VPL) nucleus
D. Medial geniculate nucleus

Answer 5

C. Ventral posterolateral (VPL) nucleus

Question 6

The greater amount of work performed by the muscles, the greater the amount of ATP cleaved into ADP and phosphate. What is this phenomenon?

A. Size principle
B. Fenn effect
C. Hilton’s Law
D. Treppe effect

Answer 6

B. Fenn effect

Question 7

What is the effect of aging on pulse pressure?

A. Increased pulse pressure (widened pulse pressure)
B. Decreased pulse pressure (narrowed pulse pressure)
C. No change in pulse pressure
D. Zero pulse pressure

Answer 7

A. Increased pulse pressure (widened pulse pressure)

Question 8

What macromolecule serves as the major constituent of the plasma membrane of human cells?

A. Phospholipids
B. Cholesterol
C. Carbohydrates
D. Proteins

Answer 8

D. Proteins

Question 9

In oogenesis, meiosis II is arrested in ____ until fertilization.

A. Prophase II
B. Metaphase II
C. Anaphase II
D. Telophase II

Answer 9

B. Metaphase II

Question 10

What organ receives the highest amount of blood in mL/minute/100 g of tissue weight?

A. Liver
B. Skeletal Muscle
C. Kidney
D. Brain

Answer 10

C. Kidney