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प्रश्न
What is meant by receptors and effectors? Give two examples of each.
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उत्तर
A receptor is a cell present in the sense organs that is sensitive to specific stimuli. Example: The eyes have light receptors which can detect light and the ears have sound receptors which can detect sound.
An effector is a part of body which can respond to a stimulus according to the instructions given from the nervous system.
Example: Muscles and glands of the human body.
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संबंधित प्रश्न
Give examples of unconditional reflexes
Which part of the eye contains cells which are sensitive to light?
Name the function of cerebrum.
A person walks across a room in barefeet and puts his foot on a drawing pin lying on the floor. He lets out a cry. Explain what happens in his nervous system in bringing about this response.
A cell (or group of cells) in a sense organ which is sensitive to a particular type of stimulus is called :
(a) interceptor
(b) effector
(c) receptor
(d) acceptor
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
Define voluntary and reflex actions. Give examples of each.
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
Reflex action is controlled by the
Give Technical Term:
Response to a stimulus without the intervention of the will of an animal.
Mention, if the following statement is True or False
Reflex action involves brain
Differentiate between Voluntary and involuntary actions.
Reflex arc allows the rapid response of the body to a stimulus.
The reflex arc which is made up of one sensory and one motor neuron is ______
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
Given alongside is a partial diagrammatic representation of a certain phenomenon pertaining to the nervous system.
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- Name the parts numbered 1-7.
- Name the phenomenon that the diagram depicts and define it.
- Give the technical term for the point of contact between two nerve cells.
- Name the parts not shown in the diagram that should be included to complete the pathway of the phenomenon.
