Machine-translated by Google. Questions are authored in English.
Top

Biological Basis of Behaviour Questions and Answers

1.

The regulation of minerals such as sodium, potassium etc. in the human body is managed by which of the following glands?

Exam Year(s)

DSSSB PGT - 2023,

Answer: C

The adrenal cortex regulates mineral salts such as sodium and potassium. Its mineralocorticoids, mainly aldosterone, make the kidney retain sodium and excrete potassium. The adrenal medulla secretes adrenaline and noradrenaline for the emergency response, and the pancreas controls blood sugar through insulin and glucagon, so neither the 'interior' nor the 'exterior' pancreas is the answer.

The adrenal cortex has three zones, and aldosterone from the outer zone (zona glomerulosa) is the hormone that regulates sodium and potassium balance.

Please log in or register to report this question.

Discuss in Forum
2.

Which part of the neuron transmits the information to another neuron or muscle?

Exam Year(s)

DSSSB PGT - 2023,

Answer: D

The terminal buttons at the ends of the axon pass information on to another neuron or to a muscle. When an impulse reaches them, they release neurotransmitter into the synapse. The myelin sheath is an insulating layer around the axon that speeds up conduction, the soma (cell body) holds the nucleus, and the dendrites receive information from other neurons instead of sending it.

The axon carries the impulse from the cell body to its far end, where it divides into small branches ending in terminal buttons that hold vesicles of neurotransmitter.

Please log in or register to report this question.

Discuss in Forum
3.

Which part of the brain is responsible for making humans alert and active on account of sensory information input?

Exam Year(s)

DSSSB PGT - 2023,

Answer: C

The reticular activating system, a network of neurons in the brainstem, keeps a person alert and active by passing sensory input up to the cortex. The limbic system deals with emotion and motivation. 'Functional activating system' and 'cerebral system' are not standard names for a brain structure with this role.

Please log in or register to report this question.

Discuss in Forum
4.

Which of the following led to the findings of the existence of a connection between the brain and immune system, that led to the emergence of the idea of psychoneuroimmunology?

Exam Year(s)

DSSSB PGT - 2023,

Answer: A

Conditioning led to the idea of psychoneuroimmunology. Experiments showed that the immune response can be conditioned: animals given a drug that suppresses immunity together with a taste cue later showed suppressed immunity to the taste alone (Ader and Cohen), which showed a link between the brain and the immune system. Serendipity means a chance discovery, biofeedback is the training of control over bodily functions, and the autokinetic effect is the apparent movement of a fixed light in the dark.

Please log in or register to report this question.

Discuss in Forum
5.

Which of the following is NOT a fundamental component of a neuron?

Exam Year(s)

DSSSB PGT - 2023,

Answer: D

The synaptic cleft is not a component of a neuron. It is the tiny gap between the terminal button of one neuron and the dendrite or cell body of the next, across which neurotransmitters pass. The soma (cell body), dendrites (receiving branches) and axon (the long fibre carrying the impulse away) are the three fundamental parts of the neuron itself.

Please log in or register to report this question.

Discuss in Forum
6.

The cranial nerves and spinal nerves are contained in which division of the nervous system?

Exam Year(s)

DSSSB PGT - 2023,

Answer: A

The key gives the somatic nervous system. The cranial nerves and spinal nerves of the peripheral nervous system carry sensory information to the central nervous system and take commands to skeletal muscles, which is the work of the somatic division. The autonomic nervous system, with its sympathetic and parasympathetic parts, controls involuntary organs such as the heart and glands, so the options naming it or its parts are not the division asked about.

Please log in or register to report this question.

Discuss in Forum
7.

In which form do children receive characteristics from parents?

Exam Year(s)

DSSSB PGT - 2023,

Answer: B

Children receive characteristics from their parents in the form of genes. Genes are carried on chromosomes and contain the hereditary instructions. The soma is the cell body of a neuron, mitochondria produce energy in the cell, and Golgi bodies package and sort proteins, so none of them carries inherited traits between generations.

Please log in or register to report this question.

Discuss in Forum
8.

Akram sustained head injury due to an accident, and consequently he lost his vision, though his eyes were intact. On which specialised lobe of his brain might he have sustained the injury?

Exam Year(s)

DSSSB PGT - 2023,

Answer: C

Loss of vision with intact eyes points to damage to the occipital lobe, the part of the cerebral cortex that receives and interprets visual information from the eyes. The temporal lobe is mainly concerned with hearing and memory, the frontal lobe with planning and movement, and the parietal lobe with touch and spatial awareness.

Please log in or register to report this question.

Discuss in Forum
9.

The colour of eyes is an example of which type of the following traits?

Exam Year(s)

DSSSB PGT - 2023,

Answer: C

Eye colour is a phenotype, the observable characteristic that results from the interaction of genes and environment. Genotype is the underlying genetic makeup, not the visible trait. Expressive and ability are labels for behavioural traits, not the term for an observable physical characteristic such as the colour of the eyes. Phenotype is the sum of the observable features of a person, such as height, skin colour and eye colour, and it depends on both genes (genotype) and environment. Eye colour is largely genetic, but it is still named by the visible feature.

Please log in or register to report this question.

Discuss in Forum
10.

Identify the bundle of nerve fibres that connect the left and right hemispheres of the brain.

Exam Year(s)

DSSSB PGT - 2023,

Answer: B

The corpus callosum is the thick bundle of nerve fibres that connects the left and right cerebral hemispheres. The pons relays signals between the cerebrum and the cerebellum in the brainstem, the medulla oblongata controls vital functions such as breathing and heart rate, and the cerebral cortex is the outer layer of grey matter rather than the connecting bundle. The corpus callosum helps the two hemispheres to share information, and when it is cut, as in split-brain surgery for severe epilepsy, the two hemispheres cannot exchange information directly, which was studied by Roger Sperry.

Please log in or register to report this question.

Discuss in Forum
Loading…

Topics

Other Subjects

Tags: Biological Basis of Behaviour Questions and Answers

About Us

ExamsRepo

Copyright © 2026 ExamsRepo . All Rights Reserved . With