Tag: neurons and synapses

Questions Related to neurons and synapses

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

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

  1. Meninx

  2. Nerve

  3. Dendrite

  4. Tract

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Correct Option: B
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'.

Which of the following is the most complete list of animals that have both a central nervous system. (CNS) and a peripheral nervous system (PNS)?

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

  1. Hydra, planarian, earthworm, rabbit, human

  2. Planarian, earthworm, rabbit, human

  3. Earthworm, rabbit, human

  4. Rabbit, human

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Correct Option: C
Explanation:

The CNS contains the brain and the spinal cord. Everything else but the CNS it is known as the PNS. The PNS contains nerves, which leave the brain and the spinal cord and travel to all the parts of the body.

So, the correct option is 'Earthworm, rabbit, human'.

How many pairs of cranial nerves are mixed nerves?

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

  1. $3$

  2. $5$

  3. $4$

  4. $6$

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Correct Option: C
Explanation:

$4$ pairs of cranial nerves are mixed nerves. These are trigeminal, facial, glossopharyngeal and vagus nerves.

Which part of the brain contains such an area which is neither clearly sensory nor motor in function?

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

  1. Medulla

  2. Cerebral cortex

  3. Grey matter of cerebrum

  4. Both A and C

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Correct Option: B
Explanation:

  • The cerebral cortex of the brain has three regions of function, namely Sensory, motor and association areas. 
  • This association area does not belong either of the primary sensory or motor regions since its function is associative.
  • The main function of these association regions is to provide a perpetual understanding of the world. it helps in effective interaction, abstract thinking, and language. 
  • These association regions are present in the form of an interwoven network.

So the correct option is 'Cerebral cortex'.

In which lobe of the cerebrum are the visual centres located?

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

  1. Frontal lobe

  2. Parietal lobe

  3. Temporal love

  4. Occipital lobe

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Correct Option: D
Explanation:

The visual system is the part of the central nervous system which gives organisms the ability to process visual detail as sight, as well as enabling the formation of several non-image photo response functions. In cerebrum, the visual centres are located on the occipital lobe.

So, the correct option is 'Occipetal lobe'.

Rapid integration of the functional activities in human is achieved by 

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

  1. Nervous system

  2. Endocrine system

  3. Blood

  4. Muscular system

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Correct Option: A
Explanation:

The body's communication systems are the endocrine and nervous systems. At an integrative level, the primary function of the nervous system is to control many of the functions of our bodies and minds. It does this by extracting information from the environment using sensory receptors, sending signals that encode this information into the central nervous system, processing the information to determine an appropriate response, and sending output signals to muscles or glands to initiate the response. The nervous system responds rapidly to short-term changes. By nature, these hormones are synthesized at a distance from their target cells and travel through the bloodstream or intercellular fluid until they reach these cells. Upon reaching their target cell, the hormone acts on the cell to increase or decrease the expression of specific genes. This process takes significantly longer than that of the nervous system, as endocrine hormones must first be synthesized, transported to their target cell, and enter or signal the cell. Then, the target cell must go through the process of transcription, translation, and protein synthesis before the intended action of the hormone can be seen . 

Identify the origin of sympathetic nerve fibres and the location of their ganglia.

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

  1. They arise from thoraco-lumbar region of spinal cord and form ganglia just beside the vertebral column.

  2. They arise from thoraco-cervical region of spinal cord and form ganglia just beside the vertebral column.

  3. They arise from cranio-sacral region of spinal cord and form ganglia very close to effector organ.

  4. They arise from thoraco-lumbar region of spinal cord and form ganglia very close to effector organ

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Correct Option: A
Explanation:
The sympathetic nervous system( also called thoracic-lumber outflow as its preganglionic fibres arise from the thoracic and lumbar region of the spinal cord) consists of two sympathetic nerves or chains running from head to the end of the sacral region, one on each side of the vertebral column.
Each sympathetic chain bears several ganglia called lateral or chain ganglia. some chain ganglia fuse to form three ganglia, in the neck, after which there is a linear series of ganglia in the thoracic and lumbar regions.
So, the correct answer is 'They arise from the thoracolumbar region of spinal cord and form ganglia just beside the vertebral column'.


Neurons are important components of

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

  1. Brain

  2. Central nervous system

  3. Spinal cord

  4. All of the above

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Correct Option: D
Explanation:

Our nervous system is made up of brain, spinal cord, sense receptors and a whole lot of nerves. But all these are ultimately made up of nerve cells or neurons.

Neurons are cells that send and receive electro-chemical signals to and from the brain and nervous system. There are about 100 billion neurons in the brain. 

Body coordination is maintained by

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

  1. Circulatory system

  2. Nervous system

  3. Endocrine system

  4. Both B and C

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Correct Option: D

Choose the type of nervous system and type of muscle supplying visceral organs

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

  1. Sympathetic nervous system, voluntary

  2. Sympathetic nervous system, involuntary

  3. Parasympathetic nervous system, involuntary

  4. Both sympathetic and parasympathetic nervous systems, involuntary

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Correct Option: D