Neural Control and Coordination – Daily Practice Problem (DPP)

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🎯 NEET 2026 Daily Practice Problem (DPP)

Topic: Neural Control and Coordination | 20 High-Yield MCQs

Q1. The structural and functional unit of the neural system is:

  1. Nephron
  2. Neuron
  3. Neuroglia
  4. Axon
✅ View Answer & Explanation

Correct Answer: (2) Neuron
Explanation: Neurons are highly specialized cells which can detect, receive and transmit different kinds of stimuli.

Q2. Unipolar neurons (cell body with one axon only) are usually found in the:

  1. Retina of eye
  2. Cerebral cortex
  3. Embryonic stage
  4. Spinal cord
✅ View Answer & Explanation

Correct Answer: (3) Embryonic stage
Explanation: Unipolar neurons are found in the embryonic stage. Bipolar neurons are in the retina, and Multipolar neurons are in the cerebral cortex.

Q3. Myelin sheath in the Peripheral Nervous System (PNS) is formed by:

  1. Oligodendrocytes
  2. Schwann cells
  3. Astrocytes
  4. Microglia
✅ View Answer & Explanation

Correct Answer: (2) Schwann cells
Explanation: In PNS, Schwann cells wrap around the axon to form the myelin sheath. In CNS, this function is performed by Oligodendrocytes.

Q4. During the resting state of a neural membrane, the axonal membrane is:

  1. More permeable to Na^+ than to K^+
  2. More permeable to K^+ and nearly impermeable to Na+
  3. Impermeable to both Na^+ and K+
  4. Equally permeable to both ions
✅ View Answer & Explanation

Correct Answer: (2) More permeable to K+ and nearly impermeable to Na+
Explanation: At rest, the membrane is relatively more permeable to Potassium ions and negatively charged proteins in the axoplasm, while being impermeable to Sodium.

Q5. The sodium-potassium pump transports:

  1. 3 Na+ outwards and 2 K+ inwards
  2. 2 Na+ outwards and 3 K+ inwards
  3. 3 Na+ inwards and 2 K+ outwards
  4. 2 Na+ inwards and 3 K+ outwards
✅ View Answer & Explanation

Correct Answer: (1) 3 Na+ outwards and 2 K+ inwards
Explanation: This active transport (using ATP) maintains the ionic gradients across the resting membrane.

Q6. Which of the following is an inhibitory neurotransmitter?

  1. Acetylcholine
  2. Norepinephrine
  3. GABA (Gamma-amino butyric acid)
  4. Glutamate
✅ View Answer & Explanation

Correct Answer: (3) GABA
Explanation: GABA is the primary inhibitory neurotransmitter in the brain. Glutamate is the primary excitatory one.

Q7. The bridge of nerve fibres that connects the two cerebral hemispheres is called:

  1. Corpus luteum
  2. Corpus callosum
  3. Corpora quadrigemina
  4. Cerebral aqueduct
✅ View Answer & Explanation

Correct Answer: (2) Corpus callosum
Explanation: The corpus callosum is a large tract of myelinated nerve fibres that allows communication between the left and right hemispheres.

Q8. Which part of the brain is the major coordinating centre for sensory and motor signaling?

  1. Hypothalamus
  2. Thalamus
  3. Cerebellum
  4. Medulla
✅ View Answer & Explanation

Correct Answer: (2) Thalamus
Explanation: The cerebrum wraps around a structure called thalamus, which acts as a relay station for most impulses going to the cerebral cortex.

Q9. The ‘Limbic system’ is involved in the regulation of:

  1. Sexual behaviour
  2. Expression of emotional reactions
  3. Motivation
  4. All of the above
✅ View Answer & Explanation

Correct Answer: (4) All of the above
Explanation: The limbic system (including amygdala and hippocampus) along with the hypothalamus regulates emotions and survival instincts.

Q10. The midbrain contains four round swellings called:

  1. Corpus callosum
  2. Corpora quadrigemina
  3. Pons
  4. Cerebellum
✅ View Answer & Explanation

Correct Answer: (2) Corpora quadrigemina
Explanation: The dorsal portion of the midbrain consists mainly of four round lobes called corpora quadrigemina (involved in visual and auditory reflexes).

Q11. The respiratory rhythm centre and cardiovascular reflexes are controlled by:

  1. Cerebrum
  2. Cerebellum
  3. Medulla oblongata
  4. Midbrain
✅ View Answer & Explanation

Correct Answer: (3) Medulla oblongata
Explanation: The medulla contains centres which control respiration, cardiovascular reflexes and gastric secretions.

Q12. The innermost layer of the eyeball is the:

  1. Sclera
  2. Choroid
  3. Retina
  4. Cornea
✅ View Answer & Explanation

Correct Answer: (3) Retina
Explanation: From outside to inside: Sclera (fibrous), Choroid (vascular), and Retina (neural).

Q13. In the human eye, the ‘Blind spot’ is the region where:

  1. Visual acuity is highest
  2. Only cones are present
  3. Optic nerves leave the eye and photoreceptor cells are absent
  4. The macula lutea is located
✅ View Answer & Explanation

Correct Answer: (3) Optic nerves leave the eye and photoreceptor cells are absent
Explanation: Photoreceptors are not present in this region, hence it is called the blind spot.

Q14. The Eustachian tube connects the:

  1. Outer ear with pharynx
  2. Middle ear with pharynx
  3. Inner ear with pharynx
  4. Middle ear with inner ear
✅ View Answer & Explanation

Correct Answer: (2) Middle ear with pharynx
Explanation: The Eustachian tube helps in equalising the pressures on either side of the ear drum.

Q15. The ‘Organ of Corti’ is located on the:

  1. Reissner’s membrane
  2. Basilar membrane
  3. Tectorial membrane
  4. Tympanic membrane
✅ View Answer & Explanation

Correct Answer: (2) Basilar membrane
Explanation: The Organ of Corti contains hair cells that act as auditory receptors and is located on the basilar membrane within the cochlea.

Q16. The specific receptors for body balance and posture are:

  1. Organ of Corti
  2. Crista ampullaris and Macula
  3. Basilar membrane
  4. Tectorial membrane
✅ View Answer & Explanation

Correct Answer: (2) Crista ampullaris and Macula
Explanation: These structures in the vestibular apparatus (semicircular canals and otolith organ) are responsible for dynamic and static balance.

Q17. Rhodopsin (visual purple) is found in:

  1. Cones
  2. Rods
  3. Iris
  4. Lens
✅ View Answer & Explanation

Correct Answer: (2) Rods
Explanation: Rods contain rhodopsin and are responsible for twilight (scotopic) vision. Cones are for daylight (photopic) and color vision.

Q18. The space between the cornea and the lens is called:

  1. Vitreous chamber
  2. Aqueous chamber
  3. Fovea
  4. Canal of Schlemm
✅ View Answer & Explanation

Correct Answer: (2) Aqueous chamber
Explanation: The aqueous chamber contains a thin watery fluid called aqueous humor. The larger space behind the lens is the vitreous chamber.

Q19. The reflex arc consists of at least:

  1. One afferent and one efferent neuron
  2. Two afferent neurons
  3. Two efferent neurons
  4. One mixed neuron
✅ View Answer & Explanation

Correct Answer: (1) One afferent and one efferent neuron
Explanation: A reflex pathway requires a sensory (afferent) neuron to receive the signal and a motor (efferent) neuron to execute the response.

Q20. Arbor vitae is composed of:

  1. Grey matter
  2. White matter
  3. Neuroglial cells only
  4. CSF
✅ View Answer & Explanation

Correct Answer: (2) White matter
Explanation: Arbor vitae (“tree of life”) is the branching pattern of white matter inside the cerebellum.

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