Tag: structure of neuron

Questions Related to structure of neuron

Which of the following belongs to the neural tissues?

zoology nervous system neural tissue structure of neuron nervous tissues

  1. Granulosa cells

  2. Cardiac cells

  3. Epithelial cells

  4. Nerve cells

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Correct Option: D
Explanation:
Nerve cells are also called neurons. They constitute the neural tissue. They are the largest cell in the human body. They are the structural and functional unit of the nervous system. 
So correct option is 'Nerve cells'.

A nerve

zoology nervous system neural tissue structure of neuron nervous tissues

  1. Contains a single axon

  2. Is found only in CNS

  3. Carries only sensory information

  4. Is a cablelike bundle of parallel axons

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Correct Option: A
Explanation:
Human brain consists of more than 100 billion nerve cells. These cells are further interlinked with each other and form complex nerve connections. A Nerve cell has many dendrites but has single axon through which electrical impulses are transmitted.
So the correct answer is 'Contains a single axon'.

Collateral fibres are given out along its way in ______________.

zoology nervous system neural tissue structure of neuron nervous tissues

  1. Muscle fibre

  2. Axon

  3. Dendron

  4. Dendrites

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Correct Option: B

Centrosomes are absent in ______________.

zoology nervous system neural tissue structure of neuron nervous tissues

  1. Nerve cells

  2. Epithelial cells

  3. Germinal cells

  4. All the above

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Correct Option: A

Which of the following is not considered to be a tissue?

zoology nervous system neural tissue structure of neuron nervous tissues

  1. cartilage

  2. Blood

  3. Lung

  4. Cardiac muscle

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Correct Option: C
Explanation:

Cartilage is supportive non-living soft connective tissue

Blood is fluid connective tissue
Cardiac muscle is a tissue made of cardiac cells
So, the correct option is 'Lung', which is an organ made of multiple tissue

The largest number of cell bodies of neurons in our body is found in:

zoology nervous system neural tissue structure of neuron nervous tissues

  1. brain

  2. tongue

  3. kidneys

  4. stomach

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Correct Option: A
Explanation:

The largest number of cell bodies of neurons in our body is found in the brain, the human brain has approximately 86 billion neurons.

So, the correct option is 'brain'.

Structure and functional unit of nervous system is

biology control and co-ordination in plants and animals nervous system in animals structure of neuron structure and function of neuron

  1. Nephron

  2. Cyton

  3. Neuron

  4. Axon

Show answer
Correct Option: C
Explanation:

Neurons are the structural and functional unit of the nervous system. Each neuron consists of dendrites, axon, and soma. Dendrites are the small extension of nerve cells that receive signals from sensory receptors or other neurons. The long extension of the cell body of the nerve cell is called as axon that serves to conduct the nerve impulse away from the cell body. Cyton /soma is the metabolic center of the nerve cell where the metabolic contents are manufactured. It is not involved in nerve impulse conduction. A nephron is the anatomical and functional unit of kidney and thus is the part of the excretory system. Thus, the correct answer is option C.

The nervous system is formed of 

biology structure and functions of living organisms -ii nervous system in animals structure of neuron structure and function of neuron role of receptors in the mouth types of teeth circulatory system and organs

  1. Brain

  2. Spinal cord

  3. Nerves

  4. All of the above

Show answer
Correct Option: D
Explanation:

The nervous system is a collection of cells, tissues, and organs ( brain, spinal cord, nerves ) through which an organism receives information from its surroundings and then directs the organism to respond to the stimulus.

So, the correct answer is 'All of the above'.

The organ that helps us to recall and analyse is 

biology structure and functions of living organisms -ii nervous system in animals structure of neuron structure and function of neuron role of receptors in the mouth types of teeth circulatory system and organs

  1. Muscles

  2. Brain

  3. Spinal cord

  4. Nerve

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Correct Option: B
Explanation:

The brain regulates an array of functions necessary for survival. The brain houses our mind and our memories. Most available evidence suggests that the functions of memory are carried out by the hippocampus and other related structures in the temporal lobe of the brain. The brain also helps in the analysis of various body functions.

So, the correct answer is 'Brain'.

A nucleated differentiated cell that has lost the power to divide is

biology control and co-ordination in plants and animals nervous system in animals structure of neuron structure and function of neuron

  1. Nerve cell

  2. Kidney cell

  3. Liver cell

  4. Leucocytes

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Correct Option: A
Explanation:
A nucleated differentiated cell that has lost the power to division are nerve cells. These are the cells of nervous system and carry electrical messages and signals throughout the body. They have lost their power to division because the existing ones can grow new connections by loosing the old ones and also these cells needs oxygen and nutrients and if it divides rapidly and get packed, it will become difficult to supply and hence will starve.
So, the correct answer is option A.