Tag: nervous system of man

Questions Related to nervous system of man

The self governing nervous system is known as

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Central nervous system

  2. Peripheral nervous system

  3. Autonomic nervous system

  4. Sympathetic nervous system

Show answer
Correct Option: C
Explanation:

The peripheral nervous system is that connects the body organs with brain and the spinal cord is divided into two parts:

  1. Somatic nervous system: The neurons of this system innervate those muscles that are controlled by the voluntary consciousness for example, muscles of limbs, neck, tongue etc.
  2. Autonomic nervous system: The neurons of this system innervates the visceral organs and their effects are not controlled by the conscious brain. They function involuntarily. So, these are the self-governing part of the nervous system. The sympathetic and parasympathetic nervous system are classified under the autonomic nervous system.
Hence, the correct answer is 'Autonomic nervous system'

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?

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla

  2. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse

  3. Hypothalamus activates the parasympathetic division of brain

  4. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex.

Show answer
Correct Option: A
Explanation:

Epinephrine and norepinephrine are released by the adrenal medulla and nervous system respectively. They are the flight/fight hormones that are released when the body is under extreme stress. They are also called as emergency hormone as it initiates quick reaction which makes the individual to think and respond quickly to the stress. The hormone increases metabolic rate. Dilation of blood vessels going to heart and the brain occurs. So, the correct answer is option A.

Comparing the somatic nervous system with the autonomic nervous system, which of the following statement is true?

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Autonomic nervous system produces involuntary movement in skeletal muscle

  2. Somatic nervous system produces voluntary movement in glands and smooth muscle

  3. Autonomic nervous system produces voluntary movement in smooth muscle and glands

  4. Autonomic nervous system produces involuntary movement in smooth muscle, viscera and glands

Show answer
Correct Option: D
Explanation:

The autonomic nervous system is the part of the nervous system that supplies that internal organs, including the blood vessels, stomach, intestine, liver, kidneys, and digestive glands.

So, the correct option is 'Autonomic nervous system produces involuntary movement in smooth muscle, viscera and glands'.

Premotor area of brain is the highest centre of

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Thinking

  2. Autonomous nervous system

  3. Movements of involuntary muscles

  4. Both B and C

Show answer
Correct Option: D
Explanation:

The premotor area occurs in the frontal lobe of the cerebrum. It is made up of the neurons that form the part of the autonomous nervous system and movements of the involuntary muscles like movements of pharynx and larynx. The prefrontal cortex of the frontal lobe is concerned with thinking and reasoning.

Hence, the correct answer is 'Both B and C'

Parasympathetic nervous system is also termed as

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Visceral

  2. Thoracico-lumbar

  3. Cranio-sacral

  4. Mesenteric

Show answer
Correct Option: C
Explanation:

The parasympathetic nervous system is a division of the autonomic nervous system. The preganglionic nerve fibres of this system arise from the brain which includes cranial nerves III, VII, IX and X, that is, the oculomotor, facial, glossopharyngeal and vagus nerves, as well as from the sacral region of the spinal cord, that is, ramus communicans 2, 3 and 4. The sympathetic nervous system is called the thoracico-lumbar.

Hence, the correct answer is 'Cranio-sacral'

Which of the following is not true concerning the autonomic nervous system?

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. Sympathetic responses include fight-or-flight responses

  2. Sympathetic responses are generally widespread throughout the body

  3. It includes sensory pre- and postganglionic fibres

  4. Autonomic division is entirely motor

Show answer
Correct Option: C
Explanation:

The autonomic nervous system is the part of the nervous system that supplies internal organs, including the blood vessels, stomach, intestine, liver, kidneys, and digestive glands.

So, the correct option is 'It includes sensory pre- and postganglionic fibres'.

Choose the correct answer from the alternatives given.
All visceral effectors are innervated by both the parasympathetic and sympathetic divisions of the autonomic nervous system for coordinating various activities of the body This concept is known is

biology nervous system of man divisions of nervous system autonomic nervous system the human brain

  1. sensory/motor regulation

  2. dual innervation

  3. autonomic summation

  4. neurotransmitter trade-off

Show answer
Correct Option: B
Explanation:

There is a dual innervation of most organs of the body by the sympathetic and parasympathetic divisions of the ANS. The connection of both systems with the hypothalamus and higher brain areas have been omitted.

So, the correct option is 'dual innervation'.

The human hind brain comprises of three parts, which one of these belongs to hind brain?

zoology nervous system of man control of blood glucose parts of the brain kidney

  1. Cerebellum

  2. Hypothalamus

  3. Spinal cord

  4. Corpus callosum

Show answer
Correct Option: A
Explanation:

The hindbrain is the lowermost or rearmost region of the brain that bridges the brain with the spinal cord and includes the medulla oblongata, pons and cerebellum. It is also called the rhombencephalon.  

So, the correct answer is 'Cerebellum'

Arbor vitae is present in 

zoology nervous system of man control of blood glucose parts of the brain kidney

  1. Cerebellum

  2. Cerebrum

  3. Diencephalon

  4. Optocoel

Show answer
Correct Option: A
Explanation:

Arbor vitae which is the largest white matter present in the center of the cerebellum. It is so called for its branched, tree-like appearance. It is important in the coordination of the arms, legs and any actions requiring hand-eye coordination. Hence, the correct answer is option A.

Arobor vitae is a part of

zoology nervous system of man control of blood glucose parts of the brain kidney

  1. Cerebrum

  2. Cerebellum

  3. Midbrain

  4. Forebrain

Show answer
Correct Option: B
Explanation:

The arbor vitae is the cerebellar white matter, so called for its branched, tree-like appearance. It resembles a fern and is present in both cerebellar hemispheres. It brings sensory and motor information to and from the cerebellum. It is located deep in the cerebellum. So, the correct answer is option B.