Tag: nervous system of man

Questions Related to nervous system of man

Which of the following nerve helps in maintaining the equilibrium of body?

zoology nervous system of man parts of the brain brain and its parts brain

  1. Trochlear

  2. Abducens

  3. Auditory

  4. Facial

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Correct Option: C
Explanation:

Depending on the plane of movement, the endolymph flowing within the semicircular canals stimulates the appropriate movement hair cells. 

The static head position is sensed by the vestibule, specifically, its utricle and saccule, which contain the hair cells. 
Different head positions produce different gravity effects on these hair cells. The hair cells for both position and movement create nerve impulses. These impulses travel over the vestibulocochlear nerve (auditory nerve) to synapse in the brain stem, cerebellum, and spinal cord. 

If a person cannot walk in a straight line or cannot balance a ride on bicycle, probably which part of his brain is not working properly? 

zoology nervous system of man parts of the brain brain and its parts brain

  1. Cerebrum

  2. Cranium

  3. Cerebellum

  4. Hypothalamus

Show answer
Correct Option: C
Explanation:

The cerebellum is a part of the brain. It controls the motor control. It receives information from the sensory systems, spinal cord and other parts of the brain and regulates the motor movements. It coordinates voluntary movements such as posture, balance, coordination and speech. So. if a person cannot walk in a straight line or cannot balance a ride on a bicycle, it means cerebellum is not working properly.

Vermis is

zoology nervous system of man parts of the brain brain and its parts brain

  1. A tiny worm

  2. Cavity of medulla

  3. The large median lobe of cerebellum in mammals

  4. A portion of mid brain

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Correct Option: C
Explanation:

The cerebellum is made up of two lateral lobe and a large vermis lobe which is divided into nine segments. It is associated with the fastigial nucleus. It is concerned with the regulation of the regulation of the muscle tone for posture and locomotion. 

Hence, the correct answer is 'The large median lobe of cerebellum in mammals'

The part of brain without its ventricle is

zoology nervous system of man parts of the brain brain and its parts brain

  1. Cerebrum

  2. Cerebellum

  3. Medulla

  4. Diencephalon

Show answer
Correct Option: B
Explanation:

The ventricles are the hollow spaces in the brain that are lined with the choroid plexus and is filled with the cerebrospinal fluid. The lateral ventricles are located in the hemispheres of the telencephalon (cerebrum). The 3rd ventricle is located in the centre of the diencephalon. The 4th ventricle is located in the centre of the metencephalon (between pons and cerebellum). The cerebral aqueduct connects the 3rd and 4th ventricle and it is located in the centre of the mesencephalon (midbrain). The cerebellum does not have any ventricle.

Hence, the correct answer is 'Cerebellum'

Which of the following connects the cerebrum of brain and brain stem?

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. Cerebral peduncles

  2. Corpora bigemina

  3. Corpora quadrigemina

  4. None of the above

Show answer
Correct Option: A
Explanation:
  • The cerebral peduncles (also known as the cerebral crus) are the part of the midbrain that links the brainstem and the cerebrum of the brain. 
  • They are the most anterior structure in the midbrain and contain the large ascending and descending tracts that run to and from the cerebrum. Hence, Cerebral peduncles connect the cerebrum of brain and brain stem.
    • So, the correct answer is 'Cerebral peduncles'.

Which of the following gland is present in brain stem?

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. Hypothalamus

  2. Pituitary gland

  3. Pineal gland

  4. All of the above

Show answer
Correct Option: C
Explanation:

  • The pineal gland is a small endocrine gland in the brain stem. 
  • The pineal gland produces melatonin, a serotonin-derived hormone which modulates sleep patterns in both circadian and seasonal cycles. 
  • The shape of the gland resembles a pine cone from which it derived its name.
Hence, Pineal gland is present in the brain stem.
So, the correct answer is 'Pineal gland'.

Select the incorrect statement regarding the peripheral neural system.

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. Somatic neural system relays impulses from the CNS to skeletal muscles

  2. Autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles of our body

  3. Sympathetic and parasympathetic neural, systems are the subdivisions of autonomic neural system

  4. Peripheral neural system excludes nerves coming, from brain and spinal cord

Show answer
Correct Option: A
Explanation:

The peripheral neural system has two parts- Automatic Neural System and Somatic Neural system. The PNS consists of all the nerves and ganglia other than that from the brain and spinal cord. SNS is associated with the voluntary control of body and ANS with the involuntary control movements of the body. The SNS consists of afferent nerves or sensory nerves, and efferent nerves or motor nerves. And the ANS consists of sympathetic and parasympathetic neural systems. Since no signal is carried from CNS so statement 1 is the correct answer. 


So, the correct answer is 'Somatic neural system relays impulses from the CNS to skeletal muscles'.


Out of the following features which are specific to mammals only?

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. Corpus callosum

  2. Hairs

  3. Pinna

  4. Homeothermy

  5. Bipedalism

Show answer
Correct Option: B
Explanation:
  • Only mammals have hairs. 
  • The hairs grow from the surface layer of the skin. 
  • Lots of hairs clumped together make up this tiger's fur.  A fur coat helps keep the mammal's body temperature at a constant level. 
  • Hence, Hairs  are specific to mammals only
  • So, the correct answer is 'Hairs'.

Which one of the following is the example of the action of the autonomous nervous system ?

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. Swallowing of food

  2. Pupillary reflex

  3. Peristalsis of the intestine

  4. Knee jerk response

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Correct Option: C

Unmyelinated nerve fibres enclosed by schwann cells are commonly found in?

zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

  1. central neural system

  2. Somatic neural system

  3. Sympathetic neural system

  4. Both $(2)$ and $(3)$

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Correct Option: A