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प्रश्न
Distinguish between the following pair of words:
Adrenalin and acetylcholine
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उत्तर
| Adrenalin | Acetylcholine |
| It is a neurotransmitter which increases the heart beat to meet any emergency . | It is a neurotransmitter which slows down the heart beat . |
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संबंधित प्रश्न
What does CNS stand for? Which part of CNS : (a) consists of two cerebral hemispheres, and (b) has spinal nerves attached to it?
The human body contains a large number of cells A which are very long and branched, and look like electric wires. The longest branch of this cell is B whereas there are many small branches C. Any two A cells do not join to one another completely in the human body. There is a microscopic gap D between every pair of adjacent A cells through which electric impulses can pass by the release of a chemical substance.
(a) What are cells A?
(b) What is the name of (i) branch B, and (ii) branches C?
(c) What is the microscopic gap D known as?
(d) What is the function of cells like A in the human body?
(e) The cells A are of three types. name the three types.
State whether the following statement is true (T) or false (F):
The pigment melanin is present in inner layers of skin epidermis.
Fill in the blank:
A neuron consists of ..................... and ...................
Define the term:
Sensory neuron
Explain the term: Motor nerve
Explain the Term: Cyton
Long answer question
Draw the neat labelled diagram of L. S. of the human brain.
Mohan is fond of playing basketball. His concentration is on shooting the ball into the opponent's basket as given in the picture.
- Which part of the brain helps Mohan to concentrate in putting the ball into the basket?
- Name the sense organ that helps to gauge the distance between the ball and the basket.
- Name the part of the brain that co-ordinates all the voluntary muscles of his body.
A bundle of axons inside the central nervous system is ______.
