PYQSide ExamsMy practice

Neural Control and Coordination · Question 20

NEET 2016 (Phase 2)MCQMedium📈 Topic in 12% papers+4−1
1

Choose the correct statement.

  1. Nociceptors respond to changes in pressure.
  2. Meissner's corpuscles are thermoreceptors.
  3. Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
  4. Receptors do not produce graded potentials.

Answer

(3) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.

Solution

(1) Nociceptors are pain receptors; changes in pressure are sensed by mechanoreceptors (e.g. Pacinian corpuscles). Incorrect.

(2) Meissner's corpuscles are touch receptors (mechanoreceptors), not thermoreceptors. Incorrect.

(3) In darkness, the photoreceptors (rods and cones) remain depolarised; light causes dissociation of retinal from opsin, changes the membrane permeability and the photoreceptor cell becomes hyperpolarised. Correct.

(4) Receptors produce graded (receptor or generator) potentials in proportion to the strength of the stimulus. Incorrect.

Answer: (3)

Out of syllabusNEET 2016 (Phase 2)

Keep practising — Neural Control and Coordination

2

Destruction of the anterior horn cells of the spinal cord would result in loss of

  1. commissural impulses
  2. integrating impulses
  3. sensory impulses
  4. voluntary motor impulses.
AIPMT 2015
3

In mammalian eye, the 'fovea' is the center of the visual field, where

  1. only rods are present
  2. more rods than cones are found
  3. high density of cones occur, but has no rods
  4. the optic nerve leaves the eye.
Out of syllabusAIPMT 2015
4

Which of the following regions of the brain is incorrectly paired with its function?

  1. Corpus callosum - communication between the left and right cerebral cortices
  2. Cerebrum - calculation and contemplation
  3. Medulla oblongata - homeostatic control
  4. Cerebellum - language comprehension
AIPMT 2015 (Cancelled)
5

A gymnast is able to balance his body upside down even in the total darkness because of

  1. tectorial membrane
  2. organ of corti
  3. cochlea
  4. vestibular apparatus.
Out of syllabusAIPMT 2015 (Cancelled)
6

Injury localized to the hypothalamus would most likely disrupt

  1. short-term memory
  2. co-ordination during locomotion
  3. executive functions, such as decision making
  4. regulation of body temperature.
AIPMT 2014
7

Which one of the following statements is not correct?

  1. Retinal is the light absorbing portion of visual photo pigments.
  2. In retina the rods have the photopigment rhodopsin while cones have three different photopigments.
  3. Retinal is a derivative of vitamin C.
  4. Rhodopsin is the purplish red protein present in rods only.
Out of syllabusAIPMT 2014
8

The most abundant intracellular cation is

  1. H+
  2. K+
  3. Na+
  4. Ca++.
NEET 2013
9

A diagram showing axon terminal and synapse is given. Identify correctly at least two of A - D. [Figure]

  1. A - Receptor, C - Synaptic vesicles
  2. A - Neurotransmitter, B - Synaptic cleft
  3. C - Neurotransmitter, D - Ca++
  4. B - Synaptic connection, D - K+
NEET 2013
10

Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics. [Figure]

  1. B - Blind spot - Has only a few rods and cones.
  2. A - Retina - Contains photoreceptors, i.e., rods and cones.
  3. C - Aqueous chamber - Reflects the light which does not pass through the lens.
  4. D - Choroid - Its anterior part forms ciliary body.
Out of syllabusNEET 2013
11

The figure shows an axon terminal and synapse. Select the option giving correct identification of labels A-D. [Figure]

  1. C-Receptor, D-Synaptic vesicles
  2. A-Axon terminal, B-Serotonin complex
  3. A-Action potential, C-Neurotransmitter
  4. B-Neurotransmitter, D-Receptor capsules
NEET 2013 (Karnataka)

All Neural Control and Coordination PYQs →

PDFDownload Neural Control and Coordination PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Zoology chapters
Class 11Animal KingdomStructural Organisation in AnimalsBiomolecules (Biology)Digestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and Integration
Class 12Human ReproductionReproductive HealthEvolutionHuman Health and DiseaseBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsBiology Experimental Skills