17455.Which one of the following is the correct statement regarding the particular psychotropic drug specified?
Barbiturates cause relaxation and temporary euphoria
Hashish causes after thought perceptions and hallucinations
Opium stimulates nervous system and causes hallucinations
Morphine leads to delusions and disturbed emotions
17456.During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.
P = Acetylcholine, Q = Ca++
P = Acetylcholine, Q = Na+
P = GABA, Q = Na+
P = Cholinesterase, Q = Ca++
17457.Which one of the common neurotransmitters is paired wrongly with the site where it is released?
Somatostatin - pancreas
Serotonin - spinal cord
Acetylcholine - Neuromuscular junctions
Endorphins - autonomic nervous system
17458.Which one of the following is correct in regard to the function of cerebellum?
Regulate heartbeat
Muscle coordination
Secretes melatonin
Sense reception
17459.Broca's area in the left hemisphere is related to ______.
Receiving the impulses from eyes
Speech
Learning and reasoning
Sensation of smell
17460.The generation of excitation-contraction coupling involves all the following events except
Generation of end-plate potential
Release of calcium from troponin
Formation of cross-linkages between actin and myosin
Hydrolysis of ATP to ADP
17461.The protein carrier in the membrane, called "sodium-potassium pump" pumps ______
Both Na+ and K+ in
Both Na+ and K+ out
Na+ in and K+ out
Na+ out and K+ in
17462.Select the correct statement from the ones given below
Cocaine is given to patients after surgery as it stimulates recovery
Barbiturates when given to criminals make them tell the truth
Morphine is often given to persons who have undergone surgery as a pain killer
Chewing tobacco lowers blood pressure and heart rate
17463.Which of the following options is appropriate for the processing center "Wernicke's area" found in left cerebral cortex?
Helps us to understand both written and spoken word
Adds grammatical refinements
Sends information to Broca's area
Both 1 and 3
17464.Assertion: The imbalance in concentration of Na+, K+ and proteins generates resting potential.
Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.
Assertion is true, but Reason is false.
Both Assertion and Reason are false.
17465.The thin and convoluted outer layer of gray matter that covers the cerebral hemispheres is
Medulla oblongata
Thalamus
Cerebral cortex
Meninges
17466.When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is
Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
Equally permeable to both Na+ and K+ ions
Impermeable to both Na+ and K+ ions
17467.Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina?
| (1) | Distribution | More concentrated in centre of retina | Evenly distributed all over retina |
| (2) | Visual acuity | High | Low |
| (3) | Visual pigment contained | Iodopsin | Rhodopsin |
| (4) | Overall function | Vision in poor light | Colour vision and detailed vision in bright light |
(1)
(2)
(3)
(4)
17468.Which neuroglia cells produce a fatty insulating material called myelin?
Satellite cells
Schwann cells
Both 1 and 2
Neither 1 nor 2
17469.The difference in charge between inside and outside environment (change in voltage) of the nerve cell membrane is measured by ______.
Oscilloscope
Electrocardiogram
Stethoscope
Laparoscope
17470.Which one of the followings is responsible for the improvement of nutrient flow to the neurons and provides electrical insulation?
Neuroglia
Motor neuron
Sensory neuron
Interneuron
17471.If vagus nerve in man is damaged, which of the following will not be affected?
pancreatic secretion
gastrointestinal movements
tongue movements
cardiac movements
17472.Which of the following is not related to the autonomic nervous system?
Peristalsis
Digestion
Excretion
Memory and learning
17473.An action potential in the nerve fibre is produced when positive and negative charges on outside and the inside of the axon membrane are reversed because
all potassium ions leave the axon
more potassium ions enter the axon as compared to sodium ions leaving it
more sodium ions enter the axon as compared to potassium ions leaving it
all sodium ions enter the axon
17474.Which of the following nerves is the largest of all the cranial nerves?
Abducens nerve
Oculomotor nerve
Olfactory nerve
Trigeminal nerve