Tag: neurons and synapses

Questions Related to neurons and synapses

Which of the following is the component of central nervous system?

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

  1. Rhombencephalon

  2. Mesencephalon

  3. Telencephalon

  4. All of the above

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Correct Option: D
Explanation:

  •  The central nervous system CNS is responsible for integrating sensory information and responding accordingly. 
  • The major divisions of the brain are the forebrain (telencephalon), midbrain (mesencephalon), and hindbrain (rhombencephalon).
  •  It consists of two main components: The spinal cord serves as a conduit for signals between the brain and the rest of the body. It also controls simple musculoskeletal reflexes without input from the brain. Hence, Rhombencephalon, Mesencephalon and Telencephalon are the components of central nervous system. 
So, the correct answer is 'All of the above'.

Largest cell in body is

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

  1. Lymph

  2. Osteoctyte

  3. Neuron

  4. Chromatophore

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Correct Option: C
Explanation:

Lymph is the fluid having the same composition as tissue fluid and is carried in lymph vessels. Osteocytes, the bone cells are the longest-lived cells. Chromatophores with black pigment present in certain parts of brain and retina are one of the largest cells at maturity; however, not it does not hold true for all chromatophores. Neurons are the largest cells that can be several feet long. Each neuron consists of the dendrite, axon and soma. Thus, the correct answer is option C.

The central nervous system develops as a result of 

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

  1. Metamorphosis

  2. Gastrulation

  3. Neurulation

  4. Invagination

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Correct Option: C
Explanation:

Metamorphosis is the process by which an organism changes its form or habits during normal development after embryonic stage.
Gastrulation is the process, where there are cell movements, which result in the reorganization of the embryo from blastula to gastrula.
Neurulation is the process of folding in the embryos of vertebrates, where there is the transformation of neural plate into the neural tube. This process induces the formation of the central nervous system.
Invagination is the infolding of one part within another part and it involves the morphogenetic processes by which an embryo takes form and is the initial step of gastrulation.
Thus, the correct answer is the option (C), 'Neurulation'.

Parasympathetic nervous system is not involved in

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

  1. Peristalsis

  2. Secretion of saliva

  3. Dilation of pupil

  4. Excitation of reproductive organs

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Correct Option: C

CNS is mostly made of

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

  1. Motor neurons and sensory neurons

  2. Sensory neurons and association neurons

  3. Association neurons

  4. Motor neurons and association neurons

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Correct Option: C

Which of the following substances leads to inhibition of central nervous system ?

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

  1. GABA

  2. Glycine

  3. Norepinephrine

  4. Both A and B

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Correct Option: D

Arbor vitae is composed of

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

  1. Grey matter

  2. White matter

  3. Neuroglia cells

  4. All the above

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Correct Option: D
Explanation:

White matter with patches of grey matter. Neuroglia cells are connective tissue cells of central nervous system. 

Brain and spinal cord are

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

  1. Effectors

  2. Receptors

  3. Nervous organs

  4. Intermediary neurons

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Correct Option: C

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

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

  1. Nerve

  2. Ganglion

  3. Tract

  4. Neuron.

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Correct Option: C
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.

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.

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

  1. Motor

  2. Sensory

  3. Integrative

  4. Responsive

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Correct Option: C
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'.