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Quiz 17
Mdcat-past-papers - NUMS Quiz
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Board: NUMS |
321. Which option given below characterizes refractory period?
Reversal of charges across the neural membrane
Change in the type of ions across the membrane
Next impulse can be conducted
Membrane potential +50mV
322. Neurotransmitter secreted at the synapse outside the CNS is:
Dopamine
Polypeptide
Androgen
Acetylcholine
323. Which of the following is a neurotransmitter?
Dopamine
Hydrochloric acid
Sodium ions
Calcium ions
324. The gap between neurons at a synapse is:
Synaptic knob
Synaptic cleft
Synaptic delay
synaptic vesicle
325. The molecule responsible for conveying messages from one neuron to the next are called:
Hormones
Activators
neurotransmitters
Enzymes
326. Place of production of neurotransmitter is:
Presynaptic membrane
Postsynaptic membrane
Dendrite
Synaptic cleft
327. What is the fate of a neurotransmitter after the transmission of nerve impulse across a synapse?
It is taken into post synaptic neuron
Remains bound to post synaptic membrane
Remains stay in the synaptic cleft
Broken down by enzymes
328. Which immediate change is brought about in the post synaptic membrane binding with excitatory neurotransmitter?
Calcium gates open
Sodium gates open
Sodium gates close
Sodium postassium pump ceases to work
329. Which of the following is a characteristics of electrical synapses?
Presence of neurotransmitters
Transmission of nerve impulse
Sodium potassium gradient
Absence of neurotransmitter
330. Functions of brainstem include all of the following Except:
Integration of reflexes
Autonomic control for respiration
Equilibrium and pressure regulation
Initiation of voluntary movement
331. Which brain portion is responsible for controlling body's coordination?
Medulla
Amygdala
Cerebellum
Pons
332. Grey matter of spinal cord does not contain:
Cell bodies of sensory neurons
Axons of motor neuron
Cell bodies of interneurons
Cell bodies of motor neurons
333. During complex activity of flight, birds require the coordination of many skeletal muscles. Which part of their brain has to be well developed?
Amygdala
Cerebrum
Cerebellum
Thalamus
334. Which part of the brain is actively used by a mathematician trying to formulate a new equation?
Hippocampus
Cerebrum
Amygdala
Pons
335. All are related to X except:
It passes information to brain
It passes information to sensory neurons
It synapses with axon of sensory neurons
It is present in gray matter
336. Blood solute potential is controlled by following hormone:
Estrogen
Epinephrine
Thyroxine
Vasopressin
337. Which of the following is known as master gland?
Pituitary
Adrenaline
Insulin
Thyroxin
338. Which is a steroid hormone?
cortisone
Adrenaline
Insulin
Thyroxin
339. Hormone secreted in bulk due to decreased water content of blood is:
ADH
Glucagon
Thyroxin
Oxytocin
340. A desert mammal faces severe dehydration in a hot sunny day. Which interval condition would lead to secretion of ADH?
High osmotic pressure of blood
High blood pressure
Low osmotic pressure of blood
Low solute potential of blood
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