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NEET Exam  >  NEET Questions  >  Human ------------- do not divide in brain af... Start Learning for Free
Human ------------- do not divide in brain after birth.

  • a)
    Nerve cells

  • b)
    Cartillage cells

  • c)
    Muscule cells

  • d)
    All of above

Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Human ------------- do not divide in brain after birth.a)Nerve cellsb)...
Human nerve cells do not divide after birth. The neural system is the control system of the body which consists of highly specialized cells called neurons. Nerve cell does not divide because they do not have centrioles, so they cannot undergo mitosis and divide to form new cells.
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Human ------------- do not divide in brain after birth.a)Nerve cellsb)...
All the three cells mentioned here do not divide after birth. Nerve cells do not dive. As they elongate there is no need for their division and they also lack centriole. Heart cells also do not divide. Rbc they lack nucleus and they are formed in the red bone marrow in adult. So I think option D is crt
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Human ------------- do not divide in brain after birth.a)Nerve cellsb)...
Nerve Cells do not divide in Brain after Birth

After birth, the human brain undergoes significant changes in its structure and function. One of the critical changes is the formation of new nerve cells or neurons. However, it is important to note that nerve cells do not divide in the brain after birth.


Nerve Cells


Nerve cells, also known as neurons, are the building blocks of the nervous system, which includes the brain, spinal cord, and peripheral nerves. These cells are responsible for transmitting information throughout the body, allowing us to think, feel, and move.


Postnatal Brain Development


The postnatal brain development is a complex process that involves the formation of new connections between neurons and the pruning of unused connections. During this period, the brain undergoes significant structural changes as new neurons migrate to their final destinations and form connections with other neurons.


Neurogenesis


Neurogenesis is the process of generating new neurons in the brain. It occurs primarily during prenatal development and continues in some regions of the brain, such as the hippocampus, throughout adulthood. However, neurogenesis does not occur in all regions of the brain.


Why Nerve Cells do not Divide in Brain after Birth?


The reason why nerve cells do not divide in the brain after birth is still not fully understood. One possible explanation is that the brain has limited space, and new neurons may disrupt existing connections and cause dysfunction. Another possible explanation is that the process of neurogenesis may be too energy-intensive for the brain to sustain.


Conclusion


In conclusion, nerve cells do not divide in the brain after birth. However, the brain undergoes significant changes during postnatal development, including the formation of new connections between neurons and the pruning of unused connections. Understanding the mechanisms of neurogenesis and postnatal brain development is critical for developing new treatments for neurological disorders and improving cognitive function.
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In multicellular organism, a group of similar cells along with intercellular substances perform a specific function. Such organization is called tissue. Epithelial tissue provides covering or lining for some part of the body. Cells are compactly packed without intercellular space. It may be simple, compound, cuboidal or of columnar type. The connective tissues.They are most abundant and widely distributed tissues which link and support the other tissues. All connective tissue except blood, secretes fibres of structural protein called collagen or elastin to provide elasticity an flexibility. The cells or fibres of the connective tissue may be loosely or arranged or compactly packed. Cartilage, bones and blood are specialized connective tissue. In muscle tissue muscle is made up of long cylindrical fibres arranged parallel to each other. Fibres are composed of fine fibrils called myofibrils. Muscle fibres contract and relax in response to stimulation. The unit of neural system is neuron. Neuroglial cell protect and supports the neuron. When neuron gets stimulated, electrical impulses are generated that travel along the plasma membrane (axon). The tissues organize to form organs which in turn associate to form organ system in multicellular organisms.Q. Which connective tissue does not secrete collagen or elastin?

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Human ------------- do not divide in brain after birth.a)Nerve cellsb)Cartillage cellsc)Muscule cellsd)All of aboveCorrect answer is option 'A'. Can you explain this answer?
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