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Set 2 of 2 · Questions 31-38 of 38

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NEET Biology · Neural Control & Coordination · Set 2 (Q31-38)

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  1. 31.
    A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
    1. (1)Hypothalamus activates the parasympathetic division of brain
    2. (2)Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal cortex
    3. (3)Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal medulla
    4. (4)Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
  2. 32.
    Select the incorrect statement regarding synapses:
    1. (1)Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.
    2. (2)The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse.
    3. (3)Electrical current can flow directly from one neuron into the other across the electrical synapse.
    4. (4)Chemical synapses use neurotransmitters
  3. 33.
    In mammalian eye, the ‘fovea’ is the centre of the visual field, where
    1. (1)The optic nerve leaves the eye
    2. (2)Only rods are present
    3. (3)More rods than cones are found
    4. (4)High density of cones occurs, but has no rods
  4. 34.
    Choose the correct statement.
    1. (1)Meissner’s corpuscles are thermoreceptors
    2. (2)Photoreceptors in the human eye are depolarised during darkness and become hyperpolarized in response to the light stimulus
    3. (3)Receptors do not produce graded potentials
    4. (4)Nociceptors respond to changes in pressure
  5. 35.
    Choose the correct statement.
    1. (1)Photoreceptors in the human eye are depolarized during darkness and become hyperpolarized in response to the light stimulus.
    2. (2)Receptors do not produce graded potentials.
    3. (3)Nociceptors respond to changes in pressure.
    4. (4)Meissner's corpuscles are thermo receptors
  6. 36.
    The cornea is the anterior portion of
    1. (1)Choroid
    2. (2)Sclera
    3. (3)Retina
    4. (4)Fovea
  7. 37.
    Myelin sheath is produced by :
    1. (1)Astrocytes and Schwann cells
    2. (2)Oligodendrocytes and Osteoclasts
    3. (3)Osteoclasts and Astrocytes
    4. (4)Schwann cells and Oligodendrocytes
  8. 38.
    The human hind-brain comprises three parts, one of which is
    1. (1)Spinal cord
    2. (2)Corpus callosum
    3. (3)Cerebellum
    4. (4)Hypothalamus