(17) In the CNS, the membranes that wrap around myelinated neurons are those of:
Anonymous Quiz
48%
Schwann cells
40%
oligodendroglia
6%
endothelial cells
5%
astrocytes
(18) Capillaries empty when mechanically stimulated.
This is called the:
This is called the:
Anonymous Quiz
16%
axon reflex
50%
white reaction
25%
flare response
8%
red reaction
(19) Normally, in postnatal life, the left ventricle is more vulnerable to ischemia and infarction compared to the right ventricle because...:
Anonymous Quiz
6%
diastolic pressure is comparable in both ventricles
30%
pulmonary vascular resistance is greater than systemic vascular resistance
26%
the left ventricle pumps much more blood than the right ventricle
31%
left ventricular subendocardial perfusion is limited to ventricular diastole
8%
flow through the right ventricle is largely passive
(20) Which of the following is a ‘negative’ acute phase reactant?
Anonymous Quiz
33%
Albumin
32%
C-reactive protein
18%
α2 macroglobulin
17%
Transferrin
(21) Which of the following is incorrect about fetal hemoglobin (Hb F)?
Anonymous Quiz
27%
In comparison to HbA, Hb F has greater affinity for 2,3–BPG
38%
The oxygen dissociation curve of HbF is shifted to the left relative to HbA.
34%
At low PO2, Hb F gives up more oxygen to tissues than Hb A.
(22) The heart continues to beat even after all nerves to it are sectioned. This property is called..:
Anonymous Quiz
14%
excitability
13%
conductivity
68%
automaticity
6%
contractility
(23) Normally, the impulse that excites the left ventricular myocardium originates in the:
Anonymous Quiz
48%
SA node
26%
Purkinje system
24%
left bundle branch
3%
ventricle
(24) The osmolar concentration of sodium in normal human plasma is approximately:
Anonymous Quiz
23%
275 – 295 mOsm/L
58%
135 – 145 mOsm/L
13%
240 – 250 mOsm/L
6%
95 – 110 mOsm/L
(25)Which of the following types of cells work as scavenger cells in the CNS?
Anonymous Quiz
55%
Microglia
28%
Oligodendroglia
15%
Ependymal cells
2%
Ependymal cells
(26)Which of the following cells in the CNS is
primarily involved in the reuptake of excitatory
neurotransmitters released by neurons?
primarily involved in the reuptake of excitatory
neurotransmitters released by neurons?
Anonymous Quiz
30%
Astroglial cell
24%
Microglial cell
29%
Oligodendroglial cell
16%
Ependymal cell
(27) In the kidneys, type I medullary interstitial cells secrete:
Anonymous Quiz
45%
renin
24%
PGE2
19%
aquaporins
12%
aldosterone
(28) Autoregulation of GFR is achieved through
changes in:
changes in:
Anonymous Quiz
11%
renal perfusion pressure
19%
renal blood flow
19%
glomerular afferent arteriolar resistance
11%
glomerular efferent arteriolar resistance
40%
C&D both
(29) The ability of the AV node to generate its own
impulses when the sinus node is “sick” is due to:
impulses when the sinus node is “sick” is due to:
Anonymous Quiz
17%
a constant phase 4 membrane potential
38%
slow calcium entry during phase zero
30%
spontaneous diastolic depolarization
14%
the absence of prepotentials
(30) What would be the change in blood flow to a
tissue if radius of the arterioles in that tissue is
doubled and perfusion pressure is halved?
tissue if radius of the arterioles in that tissue is
doubled and perfusion pressure is halved?
Anonymous Quiz
29%
Increase 8 times
34%
Increase 16 times
22%
Increase 4 times
16%
Decreases 4 times
(31) The pressure in a blood vessel at which flow
ceases is called:
ceases is called:
Anonymous Quiz
27%
mean arterial pressure
17%
pulse pressure
45%
critical closing pressure
12%
perfusion pressure
(32) Selective section of the pituitary stalk in an experimental animal usually increases the secretion of which of the following hormones?
Anonymous Quiz
38%
Growth hormone
17%
FSH
7%
LH
37%
Prolactin
(33)For each of the features of tuberculous infection listed on the left select the most appropriate association from those on the right.
a. Cold abscess. b. Miliary tubercles. c. Primary complex.
a. Cold abscess. b. Miliary tubercles. c. Primary complex.
Anonymous Poll
26%
Lesion in the lung.
56%
Lesion in lung and hilar lymph nodes.
27%
Scar tissue with calcification.
39%
Small white lesions in the liver, spleen and kidney.
36%
Soft white mass of caseous pus.
(34)Which ONE of the following is not a feature of thromboxane A2?
#34
#34
Anonymous Quiz
20%
A. Inhibits platelet adenyl cyclase.
17%
B. Produced by action of an endothelial cell enzyme.
27%
C. Produced by conversion of cyclic endoperoxidase by platelets.
22%
D. Prostaglandin with a half-life of 30 seconds.
14%
E. Stimulates platelet adhesion and aggregation.
(35) For each of the features of the clotting (coagulation) mechanism on the left selectthe most appropriate association from those on the right.
a. Common pathway. b. Extrinsic pathway. c. Intrinsic pathway.
a. Common pathway. b. Extrinsic pathway. c. Intrinsic pathway.
Anonymous Poll
28%
A. Can occur in the test tube.
68%
B. Converts prothrombin to thrombin.
27%
C. Produced by fibroblasts.
21%
D. Production of plasmin.
37%
E. Result of tissue injury.
Medical Quiz (NEET PG)
(33)For each of the features of tuberculous infection listed on the left select the most appropriate association from those on the right.
a. Cold abscess. b. Miliary tubercles. c. Primary complex.
a. Cold abscess. b. Miliary tubercles. c. Primary complex.
The answer is E, D, B. Caseous material may liquefy following invasion by polymorphs to produce tuberculous pus; this occurs in kidneys and bone and may extend intosoft tissues.
Spread by the blood stream occurs in miliary TB and organs affected contain multiplesmall (1-2 mm) white nodules (miliary tubercles) which undergo caseous necrosis.
Initial infection produces the primary lesion, i.e., in lung (A) which remains small, butbacteria spread to the regional lymph nodes to form the primary complex of primary lesionsplus involved regional lymph nodes. Scar tissue with calcification (C) is a common result ofhealing of tuberculosis.
Spread by the blood stream occurs in miliary TB and organs affected contain multiplesmall (1-2 mm) white nodules (miliary tubercles) which undergo caseous necrosis.
Initial infection produces the primary lesion, i.e., in lung (A) which remains small, butbacteria spread to the regional lymph nodes to form the primary complex of primary lesionsplus involved regional lymph nodes. Scar tissue with calcification (C) is a common result ofhealing of tuberculosis.