All questions of Organization of the Nervous System for Grade 9 Exam
If the corpus callosum is removed in mammalian brain then what will be affected :-- a)Coordination of Cerebrum
- b)Involuntary activity of brain
- c)Coordination of Cerebellum
- d)Behaviour and emotional disturbances
Correct answer is option 'A'. Can you explain this answer?
If the corpus callosum is removed in mammalian brain then what will be affected :-
a)
Coordination of Cerebrum
b)
Involuntary activity of brain
c)
Coordination of Cerebellum
d)
Behaviour and emotional disturbances
|
|
Kadambala Hemalatha answered |
Option A is correct becose, corpus callosam is trancverce connection between two cerebral hemisphears.. it helps in coordination between the two cerebral hemisphears..
The membrane which cover the brain and the spinal cord is :-
- a)White matter
- b)Grey matter
- c)Peritonium
- d)Meninges
Correct answer is option 'D'. Can you explain this answer?
The membrane which cover the brain and the spinal cord is :-
a)
White matter
b)
Grey matter
c)
Peritonium
d)
Meninges
|
Ruchi Chakraborty answered |
Meninges are the membranes that cover and protect the brain and spinal cord. There are three layers of meanings: dura mater (closest to the bone), arachnoid (loosely around the brain), pia mater (closely attached to the brain and spinal cord surface).
Which of the following is a richly vascular layer with lots of blood capillaries :-- a)Duramater
- b)Piamater
- c)Epidermis of skin
- d)Both (1) & (2)
Correct answer is option 'B'. Can you explain this answer?
Which of the following is a richly vascular layer with lots of blood capillaries :-
a)
Duramater
b)
Piamater
c)
Epidermis of skin
d)
Both (1) & (2)
|
Riya Banerjee answered |
The pia mater of the brain is the innermost of the three membranes, that cover it. It is the vascular membrane of the brain. It carries the minute branches of the two internal carotids and the two vertebral arteries. It also returns the blood to the heart. The dura mater is the most external membrane of the brain. It forms the internal periosteum of the skull. The dura mater is a dense, tough, inelastic fibrous membrane. The epidermis contains no blood vessels, and cells in the deepest layers are nourished by diffusion from blood capillaries extending to the upper layers of the dermis. So, the correct answer is option B.
Corpus callosum connects :-- a)Two cerebral hemisphere
- b)Two optic lobes
- c)Two olfactory lobes
- d)Optic chiasma
Correct answer is option 'A'. Can you explain this answer?
Corpus callosum connects :-
a)
Two cerebral hemisphere
b)
Two optic lobes
c)
Two olfactory lobes
d)
Optic chiasma
|
Anjali Iyer answered |
The part of the brain that connects the two hemispheres of the brain is called the corpus callosum. It contains a bundle of neuronal fibers found in humans and other higher order mammals that allow the two hemispheres to talk to one another.
Where is the midbrain located?- a)Between hypothalamus and pons
- b)Between cerebrum and hypothalamus
- c)Between cerebellum and medulla
- d)Between pons and medulla
Correct answer is option 'A'. Can you explain this answer?
Where is the midbrain located?
a)
Between hypothalamus and pons
b)
Between cerebrum and hypothalamus
c)
Between cerebellum and medulla
d)
Between pons and medulla
|
Top Rankers answered |
The midbrain is located between the hypothalamus of the forebrain and the pons of the hindbrain. The midbrain is also known as the mesencephalon and controls several motor movements.
Which part of the neuron is present in a high concentration in the grey matter?- a)Cell body
- b)Axon
- c)Dendrites
- d)Synaptic knobs
Correct answer is option 'A'. Can you explain this answer?
Which part of the neuron is present in a high concentration in the grey matter?
a)
Cell body
b)
Axon
c)
Dendrites
d)
Synaptic knobs
|
Gayatri Desai answered |
Grey Matter and Neurons
Grey matter is a type of neural tissue found in the brain and spinal cord. It consists of cell bodies, dendrites, and synapses, and appears grey due to the presence of unmyelinated axons and glial cells. Neurons are the functional units of the nervous system and they transmit information through electrical impulses.
Concentration of Cell Bodies in Grey Matter
The grey matter contains a high concentration of cell bodies compared to other parts of the neuron. The cell body, also known as the soma or perikaryon, is the main part of the neuron that contains the nucleus and various organelles necessary for cellular functions. It is responsible for maintaining the metabolic and structural integrity of the neuron.
Functions of Cell Bodies
The cell body plays several important roles in the neuron:
1. Protein synthesis: The cell body contains ribosomes and other organelles involved in protein synthesis. It produces proteins that are essential for the survival and functioning of the neuron.
2. Metabolism: The cell body generates energy and metabolizes various substances required for neuronal processes. It produces ATP through cellular respiration to fuel the neuron's activities.
3. Integration of information: The cell body receives signals from dendrites and processes them. It integrates these signals and determines whether to transmit or inhibit the electrical impulse.
4. Structural support: The cell body provides structural support to the neuron by giving it its shape and stability. It also connects to other neurons through synapses.
Conclusion
In conclusion, the cell body is present in a high concentration in the grey matter. It is responsible for various vital functions such as protein synthesis, metabolism, integration of information, and structural support. Understanding the distribution and functions of different parts of the neuron, including the cell body, is essential in comprehending the complexity of the nervous system and its role in various physiological processes.
Grey matter is a type of neural tissue found in the brain and spinal cord. It consists of cell bodies, dendrites, and synapses, and appears grey due to the presence of unmyelinated axons and glial cells. Neurons are the functional units of the nervous system and they transmit information through electrical impulses.
Concentration of Cell Bodies in Grey Matter
The grey matter contains a high concentration of cell bodies compared to other parts of the neuron. The cell body, also known as the soma or perikaryon, is the main part of the neuron that contains the nucleus and various organelles necessary for cellular functions. It is responsible for maintaining the metabolic and structural integrity of the neuron.
Functions of Cell Bodies
The cell body plays several important roles in the neuron:
1. Protein synthesis: The cell body contains ribosomes and other organelles involved in protein synthesis. It produces proteins that are essential for the survival and functioning of the neuron.
2. Metabolism: The cell body generates energy and metabolizes various substances required for neuronal processes. It produces ATP through cellular respiration to fuel the neuron's activities.
3. Integration of information: The cell body receives signals from dendrites and processes them. It integrates these signals and determines whether to transmit or inhibit the electrical impulse.
4. Structural support: The cell body provides structural support to the neuron by giving it its shape and stability. It also connects to other neurons through synapses.
Conclusion
In conclusion, the cell body is present in a high concentration in the grey matter. It is responsible for various vital functions such as protein synthesis, metabolism, integration of information, and structural support. Understanding the distribution and functions of different parts of the neuron, including the cell body, is essential in comprehending the complexity of the nervous system and its role in various physiological processes.
The box like bony structure which encloses the brain is called :-- a)Cranium
- b)Pericardium
- c)Peritoneum
- d)Periosteum
Correct answer is option 'A'. Can you explain this answer?
The box like bony structure which encloses the brain is called :-
a)
Cranium
b)
Pericardium
c)
Peritoneum
d)
Periosteum
|
Ramesh Chand answered |
The box enclosing and protecting the brain is called as the cranium . The cranium is the part of the skull, that encloses the brain. Therefore option A is the correct answer.
Cerebellum is concerned with :-- a)Co-ordination of muscular movement
- b)Memory
- c)Vision
- d)Reflex action
Correct answer is option 'A'. Can you explain this answer?
Cerebellum is concerned with :-
a)
Co-ordination of muscular movement
b)
Memory
c)
Vision
d)
Reflex action
|
|
Sanjana Singh answered |
Cerebellum is a part of the brain and is responsible for motor control which includes muscle movement , equilibrium and balance as it relates to movement .
So 'a' is correct.
So 'a' is correct.
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