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Neural Control and Coordination · Question 22

AIPMT 2015MCQEasy📈 Topic in 12% papers+4−1
1

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.

Answer

(3) high density of cones occur, but has no rods

Solution

As per NCERT, the fovea is a thinned-out portion of the retina where only the cones are densely packed (rods are absent). It is the point where the visual acuity (resolution) is the greatest.

The optic nerve leaves the eye at the blind spot, not at the fovea.

Answer: (3)

Out of syllabusAIPMT 2015

Keep practising — Neural Control and Coordination

2

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)
3

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)
4

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
5

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
6

The most abundant intracellular cation is

  1. H+
  2. K+
  3. Na+
  4. Ca++.
NEET 2013
7

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
8

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
9

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)
10

A sagittal section of human brain is shown here. Identify at least two labels from A-D. [Figure]

  1. A-Cerebral hemispheres, B-Cerebellum
  2. B-Corpus callosum, D-Medulla
  3. C-Mid brain, D-Cerebellum
  4. A-Cerebrum, C-Pons
NEET 2013 (Karnataka)
11

The human hind brain comprises three parts, one of which is

  1. spinal cord
  2. corpus callosum
  3. cerebellum
  4. hypothalamus.
AIPMT 2012 (Prelims)

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