Biology

Nervous System and Neurons

1,224 Questions

The nervous system and neurons section covers the structural and functional aspects of the human nervous system. Topics include nerve fibers, the myelin sheath, and sympathetic nervous system functions. This material is crucial for general science preparation in various competitive exams.

Neuron structureMyelin sheath productionSympathetic nervous systemCranial and spinal nervesParasympathetic functions

Nervous System and Neurons Questions

Multiple choice biology human brain and sense organs the brain nervous system in humans central nervous system

If medulla oblongata is destroyed what function is affected

  1. No vision

  2. No memory

  3. No thermoregulation

  4. No response when pricked with needle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The medulla oblongata controls vital autonomic functions like breathing, heart rate, and blood pressure. While it is part of the brain stem, the specific response to a needle prick (a spinal reflex) is primarily mediated by the spinal cord, though the medulla is essential for overall life support.

Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

End plate junction is present between

  1. Neuron and striated muscle

  2. Neuron and neuron

  3. Muscle and muscle

  4. Both B and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The area of contact between the ends of a large myelinated nerve fibre and a fibre of the skeletal muscle is called the motor end plate junction. It is also called as a neuromuscular junction or myoneural junction.
Thus, the correct answer is the option (A), 'Neuron and striated muscle'.

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Which of the following part of nervous system regulates the internal and involuntary movement?

  1. Sympathetic

  2. Parasympathetic

  3. Cerebellum

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Nervpus system is divided into two types CNS and peripheral nervous system.
  • The peripheral nervous system is in turn divided into the somatic nervous system and autonomic nervous system.
  • The autonomic nervous system regulates the internal and involuntary movement.For example,respiration,cardiovascular,digestive etc.
  • The autonomic(visceral) nervous system is again divided into the sympathetic and parasympathetic nervous system.
  • Hence the sympathetic and parasympathetic are  part of nervous system regulates the internal and involuntary movement,
  • So, the correct answer is 'Both A and B'.
Multiple choice zoology nervous system of man parts of the brain brain and its parts brain

Spinal cord originates from cerebellum.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The spinal cord is a long bundle of nervous tissue that originates from the medulla oblongata to the lumbar region of the vertebral column. It connects brain to peripheral nerves in the body. It acts as means of communication. 

Thus, the correct answer is option B.

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

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

  1. Trochlear

  2. Abducens

  3. Auditory

  4. Facial
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

Select the incorrect statement regarding the peripheral neural system.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Which of the following best describes the peripheral nervous system?

  1. System consisting hormone and neurotransmitter

  2. System consisting spinal cord and motor neurons

  3. System consisting all nerves outside the brain and spinal cord

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The peripheral nervous system is one of two components that make up the nervous system of bilateral animals, with the other part being the central nervous system. 
  • The PNS consists of the nerves and ganglia outside the brain and spinal cord. Hence, System consisting all nerves outside the brain and spinal cord best describes the peripheral nervous system.
So, the correct answer is 'System consisting of all nerves outside the brain and spinal cord'.
Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Parasympathetic nervous system is not involved in

  1. Peristalsis

  2. Secretion of saliva

  3. Dilation of pupil

  4. Excitation of reproductive organs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The parasympathetic nervous system is responsible for 'rest and digest' functions, such as increasing peristalsis and saliva secretion. Dilation of the pupil (mydriasis) is controlled by the sympathetic nervous system, not the parasympathetic.

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

CNS is mostly made of

  1. Motor neurons and sensory neurons

  2. Sensory neurons and association neurons

  3. Association neurons

  4. Motor neurons and association neurons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The central nervous system (CNS) is primarily composed of association neurons (interneurons) that process information and facilitate communication between sensory and motor neurons. Sensory and motor neurons are primarily located in the peripheral nervous system.

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

The bundle of axons in the central nervous system is known as

  1. Nerve

  2. Ganglion

  3. Tract

  4. Neuron.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the central nervous system the nerve fibres are organized in bundles called tracts. Ascending tracts carry impulses along the spinal cord toward the brain, and descending tracts carry them from the brain or higher regions in the spinal cord to lower regions.  So, the correct answer is option C.

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

Choose the correct answer from the alternatives given.
If the nervous system, after receiving information, interprets the information and decides how it might  respond, it is relying on the function.

  1. Motor

  2. Sensory

  3. Integrative

  4. Responsive
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The nervous system is a highly integrated system. It has three overlapping functions based on sensory input, integration, and motor output. At a more interactive level, the primary function of the nervous system is to control and communicate information throughout the body.

so, the correct option is 'Integrative'.

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

A bundle of fibres found outside the central nervous system is known as a

  1. Meninx

  2. Nerve

  3. Dendrite

  4. Tract
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bundles of fibres or axons, in the peripheral nervous system, are called nerves, and bundles of afferent fibres are known as sensory nerves. An efferent nerve fibre conducts signals from a motor neuron in the central nervous system to muscles.

So, the correct option is 'Nerve'.