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प्रश्न
Complete the following sentence with appropriate word :
A nerve chain between a receptor and an effector organ is called _________.
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उत्तर
A nerve chain between a receptor and an effector organ is called Reflex arc.
संबंधित प्रश्न
What are the short fibres of a neuron known as?
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.
Draw a labelled diagram of eye.
Fill in the blank:
Central nervous system consists of ................. and ................
What are the nerves? Mention the types of nerves found in humans.
Choose the correct answer.
Number of cranial nerves _____________
Enlist the meninges of human brain.
Distinguish between
Sympathetic and parasympathetic nervous system.
Which of the following statement is correct about the node of Ranvier?
Eight pairs of spinal nerves originate from ______ part of vertebral column.
