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Quiz 18
Mdcat-past-papers - UHS - Biology Quiz
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Board: UHS | Subject: Biology |
341. Which structure respond when they are stimulated by impulse coming through motor neuron?
Receptors
Responses
Effectors
Transductors
342. The part of neuron fibre which conducts nerve impulses away from the cell body is:
Dendron
dendrites
Axon
Peripheral branch
343. The number of cranial nerves in human are:
31 pairs
12 pairs
24 pairs
62 pairs
344. Which of the following is the effect of sympathetic nervous system?
Constriction of bronchi
decrease in heart rate
Promotes digestion or peristalsis
dilates the pupil
345. Depolarization during conduction of nerve impulse is due to:
Inward movement of Na+
Inward movement of K+
Outward movement of K+
Outward movement of Na+
346. The nerve impulse which travels from node to node in myelinated neurons is called as:
Resting membrane Potential
Saltatory nerve impulse
Threshold stimulus
Initial nerve impulse
347. How many sodium ions are pumped out in response to two potassium ions transported into the membrane?
2
3
4
1
348. Taste buds on the tongue are of:
Pressure Receptors
Chemoreceptors
thermoreceptors
Photoreceptors
349. If stimulus is above --------,impulses travel to the brain along the sensory neuron.
Action Potential
Threshold potential
Resting potential
Recovery period
350. The reflex action is the phenomenon which only involves:
Brain,receptors,Spinal cord
Receptors,Neuron,Brain
Receptors,Effectors,Spinal cord
Receptors and effectors
351. In an action potential the permeability of sodium ions in the neuron increases due to:
Action of acetylcholine sterase enzyme
Opening of sodium channels/gates
Repolarization
Sodium ions forming an ionic bond
352. There is no clear difference between dendrites and axons in sensory neurons, except:
Thickness
Length
Terminal portions
None of above
353. In a typical nerve , the action potential duration is:
1 milli second
1 second
1 micro second
1 minute
354. During resting membrane potential condition:
outer surface of neuron is more positive
inner surface of neuron is more positive
both of these are equally positive
both of these are equally negative
355. The value of the active membrane potential of the neuron is:
0.01 Volts
0.05 Volts
0.02 Volts
0.07 Volts
356. The pressure receptors that receive deep pressure stimulus in humans body are called ;
Meissners corpuscles
Paccinian corpuscles
Red blood corpuscles
White blood corpuscles
357. In human myelinated fibres nerve impulse travels at ----- meters per second.
100-120
130-150
160-180
190-210
358. Nissl's granules are groups of:
Mesosomes
Lysosomes
Ribosomes
Chromosomes
359. During Non-conducting state, the neuron membranes is permeable to efflux of:
K+
Na+
Ca+
Cl-
360. Depolarization during conduction of nerve impulse is due to:
Inward movement of Na+
Inward movement of K+
Outward movement of K+
Outward movement of Na+
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