Physiology

Question 1

The movement of air into the airways and lungs due to respiration results in response to

a. positive pressure gradient from the lung interior to the
atmosphere
b. Reduced intrapleural pressure
c. A negative pressure gradient from the atmosphere to
the lung interior
d. Stimulation from the apneustic center of the pons

Answer 1

reduced intrapleural pressue

Question 2

Pernicious anemia may be due to damage to the
A proximal ileum
B distal jejunum
C gastric mucosa

Answer 2

Gastric mucosa

Question 3

Individuals who have significant amounts of the fetal form of hemoglobin in adulthood have:

Answer 3

Beta thallasemia

Question 4

Iron requires ___ to be absorbed

Answer 4

Vitamin C

Question 5

During isovulumutric relaxation the:

a semilunar valve is closed
b av valves are open
c. av valves are closed

Answer 5

AV valves are closed

Question 6

Thyroid gland releases

Answer 6

calcitonin

Question 7

What wraps around the actin filament binding site?

a. troponin
b. tropomyosin
c. myosin
d. calcium

Answer 7

Myosin (head)

Question 8

In normal breathing, which occurs on inspiration

Answer 8

tidal volume

Question 9

The amount of air moving through the lungs from maximal exhalation to maximal inhalation is the:

Answer 9

IRV+ERV+TV

Question 10

The amount of air moving through the lungs at rest is the: tidal volume

Answer 10

Tidal volume

Question 11

A potent vasoconstrictor, angiotensin II has a significant impact on blood pressure following its formation in the

Answer 11

Lungs by ACE

Question 12

Angiotensin II exerts as a powerful effect on blood pressure, causing increased pressure through ___ and retention of___

Answer 12

Vasoconstriction; salt, water

Question 13

The neural communication between the cerebrum and the cerebellum goes through the:

Answer 13

Pons

Question 14

Can cortisol be responsible for the synthesis of fatty acids:

Answer 14

Yes

Question 15

Which of the following structures is not part of the nephron ?

Answer 15

collecting duct

Question 16

Which of the flowing gastric cells secrete HCL

Answer 16

Parietal

Question 17

Angiotensinogen is converted to angiotensin I by

Answer 17

Renin

Question 18

The process of inspiration requires energy expenditure which is mainly due to the need to overcome:

A tissue elasticity
Surface tension in the alveoli
Tissue viscosity
Airway resistance to flow

Answer 18

tissue elasticity

Question 19

What blood test finding best describes respiratory acidosis?

Answer 19

decreased pH

Question 20

Which Gastric cells produce pepsinogen?

Answer 20

chief cells

Question 21

Compensatory effect of respiratory acidosis is:

Increased serum bicarbonate levels
Increased rate and depth of respiration
Increased serum carbonic acid levels
Decrease in the rate and depth of respiration

Answer 21

Increased rate and depth of respiration

Question 22

Surfactant, which greatly reduces the surface tension is secreted by what cells:

Answer 22

Alveolar Type II cells

Question 23

The QRS complex results from:

Atrial contraction
Atrial depolarization
Ventricular repolarization

Answer 23

Ventricular repolarization

Question 24

The head of the pancreas secretes

Answer 24

(digestive) enzymes (bcarbonate ions, pancreatic juice)

“Exocrine pancreas”

Question 25

ADH is primarily found at:

Distal convoluted tubule
Collecting duct
Both the distal convoluted tubule and collecting duct

Answer 25

Collecting duct