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प्रश्न
Name one gustatory receptor and one olfactory receptor present in human beings.
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उत्तर
The gustatory receptors detect taste and are located at tongue.
The olfactory receptors detect the smell and are located at the nose.
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संबंधित प्रश्न
Briefly explain the following terms : Reflex action
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
Which of the following statements are true?
(i) sudden action in response to something in the environment is called reflex action
(ii) sensory neurons carry electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
State whether the following is simple reflex, conditioned reflex or neither of the two:
Lifting up a book: …………………..
Explain the following term :
Conditioned reflex
State whether the following is
The sudden application of brakes without thinking
In reflex action, the reflex arc is formed by ______
Which of the following is not involved in Knee-jerk reflex?
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
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- Name the phenomenon shown in the figure and define the same.
- Identify the parts labelled as 1 and 2. Write one functional difference between these two.
- Name the bony protective covering and the membranous protective covering of the spinal cord.
- Label the guidelines 3 and 4.
- How is the labelled part 3 different from part 4 with respect to its composition (part of neuron)?
- Give the technical term for the point of contact between the two nerve cells.
- Name the fluid filled inside the central canal of spinal cord.
- Name the term used for a small gap between two neurons.
- Give one example of a neurotransmitter.
- Draw a neat diagram of a nerve cell and label the parts: Perikaryon, Node of Ranvier, Myelin sheath and Axon terminals.
