16 Which of the following statements about
16 Which of the following statements about tuberculosis is INCORRECT? a. Person exposed to tubercle bacilli in past have sensitized T cells. b. Person with strong immune system develop latent infection in which granulomas formed harbor the organisms. c. Hypersensitive reaction produces positive test for tuberculosis. d. NONE of the above is INCORRECT 1 points 17 Which of the following about the mechanism of acetylcholine esterase enzyme is/are CORRECT? a. It breaks down acetylcholine neurotransmitter. b. Inhibitor of this enzyme is used in Alzheimer’s disease. c. Neostigmine is an inhibitor of the above enzyme. d. Only (a) and (c) are CORRECT. e. All of the above are CORRECT. 1 points 18 Occlusion of basilar artery leads to a. Visual problem b. impairment of vital fuctions c. loss of equilibrium d. All of the above are CORRECT. e. Both (a) and (b) are CORRECT. 1 points 19 A person had mean arterial pressure (MAP) of 180 mm Hg. His intracranial pressure (ICP) is about 60 mm Hg. What will be his cerebral perfusion pressure (CPP) and what will be the effect on his brain? a. His CPP will be 120 mm Hg which is in its normal range and will have no effect on brain function. b. His CPP will be 240 which would affect brain function adversely. c. His CPP will be 120 mm Hg and he might be at risk of developing stroke. d. None of the above is CORRECT. 1 points 20 Which of the following is NOT correctly paired? a. Schwaan cells – near axon in PNS b. Microglia – around the ganglion c. Oligodendrites – near axon in CNS d. Ependymal cells – lining the ventricles e. Astrocytes – near blood capillaries 1 points 21 Prolonged hypoglycemia can cause irreversible damage to brain because 1. Hypoglycemia reduces blood flow causing ischemia 2. Glucose is the primary energy source. 3. Hypoglycemia increases brain O2 demand. 4, Brain cannot use fat as an energy source. a. Only 1 and 3 are CORRECT. b. Only 2 and 4 are CORRECT. c. Only 4 is CORRECT. d. All are CORRECT. 1 points 22 Which of the following statement about synapses is INCORRECT? a. At a chemical synapse, impulse can go only one direction from presynaptic neuron to post synaptic cell. b. Electrical synapses provide a fast response. c. At a chemical synapse calcium is required to release neurotransmitter in synaptic cleft. d. At a chemical and electrical synapses, neurotransmitter has to be removed by an enzyme to terminate the action. e. At a chemical synapse, post synaptic cell will respond to both, excitatory as well as inhibitory neurotransmitters. EPSP’s: a. can be produced by increased permeability to Na+ or Ca++ ions. b. can be produced by increased permeability to Cl- ions. c. will take place when glutamate binds to its receptor. d. Both (a) and (c) are CORRECT. e. Both (b) and (c) are CORRECT. Which of the following statements about right and left ventricular failure is/are CORRECT? a. Left ventricular failure is a common cause of right ventricular failure. b. Jugular vein distension is a sign of right ventricular failure. c. Pulmonary hypertension leads to right ventricular failure. d. Left ventricular failure leads to pulmonary edema. e. All of the above are CORRECT SCIENCE HEALTH SCIENCE NURSING BIO 3120
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