Physiology #10 – Unidontia

1. oxygen dependent killing is done through

superoxide dismutase

NADPH oxidase

catalase

glutathione peroxidase

2. Which of the following urinary constituents is probably present in abnormally high concentration and accounts for bubbles in the urine and generalized edema, especially noticeable in dependent regions and under the eyes?

Chloride

Sodium

Glucose

Albumin

3. In body plethysmography,a person is asked to expire against a closed glottis. What will be the change in the pressure in the lung and the box

Decrease in lung, increase in box

Decrease in both

Increase in both

Increase in lung, decrease in box

4. Nitrogen washout method is used for estimating

Diffusion capacity

Dead space volume

Functional residual capacity

Tidal volume

5. Transpulmonary pressure is

Pleural pressure minus alveolar pressure

Alveolar pressure minus pleural pressure

none of the above

Pleural pressure plus alveolar pressure

6. The oxygen hemoglobin dissociation curve is sigmoid because

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

7. Increasing urine flow rate from 1 mL/min to 10 mL/min will significantly increase the clearance of

creatinine

inulin

urea

penicillin

8. pulmonary compliance is decreased in all of the following conditions except

COPD

pulmonary congestion

decrease surfactant

pulmonary fibrosis

9. which of the following enzyme is stable at acidic pH

pepsin

chymotripsin

carboxypeptidase

trypsin

10. Dicrotic notch is caused by

Closure of aortic valve

Closure of mitral valve

Opening of aortic valve

Opening of mitral valve

11. why fetal cells continue to divide but terminally differentiated adult cells do not divide

phosphatase is absent in fetal cells

proteinase is absent in fetus

there are many cyclin inhibitors which prevent cell from entering into S phase in adults

absence of CD kinase

12. site of RBC formation in a healthy 20 year old male is

liver

flat bones

yolk sac

long bones

13. Which of the following is most likely to be decreased during resting conditions for a patient that has been severely anemic (Hb = 6.0 g/dL) for several months?

Mixed venous PO2

2,3-diphosphoglycerate

Arterial PO2

Cardiac output

14. 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

Creatinine clearance

Plasma creatinine concentration

Daily excretion of sodium

15. all of the following antibacterial proteins are secreted from primary granules except

bacterial permeability increasing proteins

lactoferrin

defensins

lysozyme

16. Bile acids are reabsorbed from

Duodenum

Distal jejunum

Ileum

Proximal jejunum

17. which of the following is not a primary taste

chilli

sour

bitter

sweet

18. regarding transport of substances through the cell membrane all are true except

glucose is transported via facilitated diffusion

facilitated diffusion requires carrier protein

facilitated diffusion requires energy

active transport is an energy deriven process

19. all of the following are true ablout intestinal motility except

increased by distension

increased by cholecystokinin

increased by acetylcholine

does not depend upon gastric motility

20. 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?

Mannitol

Creatinine

Phosphate

Penicillin

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