Physiology #9 – Unidontia

1. maximum postprandial motility is seen in

ascending colon

transverse colon

descending colon

sigmoid colon

2. Which of the following indices would be expected to be decreased in a kidney donor after full recovery from the removal of the kidney?

Creatinine production

Plasma creatinine concentration

Creatinine clearance

Daily excretion of sodium

3. The oxygen hemoglobin dissociation curve is sigmoid because

Binding of one oxygen molecule increases the affinity of binding other O2 molecules

Binding of oxygen to hemoglobin reduces the affinity of Hb for CO2

Oxygen affinity of haemoglobin decreases when the pH of blood falls

Binding of one oxygen molecule decrease the affinity of binding other O2 molecules

4. bile acid pool circulates

8 times per day

10 times per day on fasting

twice between meals

4 times per meal

5. Best test for GFR is with

Hippuric acid

PAH

Creatinine

Inulin

6. which of the following is required for conversion of prothombin to thrombin

stable factor

labile factor

fibrin

thromboplastin

7. an important non respiratory function of lungs is

potassium balace

sodium balance

calcium balance

anion balance

8. A student volunteers to have his lung volumes and capacities measured. He is instructed to breathe several times until the helium has equilibrated between the spirometer and his lungs, and then exhale as much air as he possibly can. Calculations are made to determine the amount of air remaining in his lungs, which is called the

residual volume

expiratory reserve volume

inspiratory capacity

functional residual capacity

9. The clearance of several substances was measured at a constant glomerular filtration rate and constant urine flow rate, but at increasing plasma concentrations of the substance. Under these conditions, clearance will increase at high plasma concentrations for which of the following substances?

Penicillin

Mannitol

Phosphate

Creatinine

10. Pulmonary function abnormalities in interstitial lung diseases include all of the following except

Reduced FEV1/FVC ratio

Reduced total lung capacity

Reduced diffusion capacity

Reduced vital capacity

11. Coronary blood flow regulated by

Local muscle action and reflexes

Sympathetic adrenergic system

Sympathetic cholinergic system

parasympathetic system

12. Carbon dioxide is transported in blood by a variety of mechanisms.Which of the following is quantitatively the most important method for transporting CO2?

As carbaminohemoglobin

As CO2 in physical solution

As CO2 in gas bubbles

As sodium bicarbonate in serum

13. lining cells of bronchi include all of the following except

brush cells

kulchitsky cells

langerhans cells

clara cells

14. If diameter of a vessel is doubled

Blood flow decreases sixteen fold

Blood flow increases four fold

Blood flow decreases four fold

Blood flow increases sixteen fold

15. A dietary deficiency of which of the following is most strongly associated with a neural tube defect at the base of the fetus’s spine?

Calcium

Vitamin C

Folate

Iron

16. What is the role of the macrophage during antibody formation?

Processing antigen and presenting it to T helper CD4 cells

Lysis of virus-infected cells

Activation of cytotoxic CD8 T cells

Delayed hypersensitivity reaction

17. Which of the following vascular structures contains the largest proportion of the total blood volume in a normal individual?

Arterioles

Capillaries

Venules and veins

Aorta and large arteries

18. Most diffusible ion across membrane

Cl –

Na +

None

K +

19. vagal stimulation of the heart causes

increased R-R interval in ECG

increased force of heart contraction

increases heart rate

increased cardiac output

20. all of the following statements about bronchial circulations are true except

cause venous admixing of blood

provide nutritive function to lung

contribute to gaseous echange

contribute 2 % of systemic circulation

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