Tag: major divisions of nervous system

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Questions Related to major divisions of nervous system

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

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

  1. Rhombencephalon

  2. Mesencephalon

  3. Telencephalon

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Largest cell in body is

  1. Lymph

  2. Osteoctyte

  3. Neuron

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

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

The central nervous system develops as a result of 

  1. Metamorphosis

  2. Gastrulation

  3. Neurulation

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

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

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

  1. GABA

  2. Glycine

  3. Norepinephrine

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

GABA (gamma-aminobutyric acid) and Glycine are the primary inhibitory neurotransmitters in the central nervous system. They work by increasing chloride ion conductance, which hyperpolarizes the neuron and inhibits action potentials.

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'.