Advertisements
Advertisements
प्रश्न
Given alongside is a partial diagrammatic representation of a certain phenomenon pertaining to the nervous system.
 |
- 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.
Advertisements
उत्तर
-
- White matter
- Spinal cord
- Dorsal root (sensory)
- Association Neuron
- Ventral root
- Gray matter
- Central Canal
- The diagram depicts spinal reflex action.
It is an automatic/quick/immediate, involuntary action in the body brought about by a stimulus. - Synapse
- Receptor, sensory neuron, motor neuron, ·spinal nerve, effector muscles
APPEARS IN
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 helps in maintaining posture and balance of the human body?
Which of the following statements is correct about receptors?
A cylindrical structure P in our body begins in continuation with medulla and extends downwards. It is enclosed in a bony cage Q and surrounded by membranes R. As many as x pairs of nerves arise from the structure P. The structure P is involved in the reflex actions of our body and conduction of nerve impulses to and from another organ S of our body with which it forms CNS.
(a) Name the structure P.
(b) Name (i) bony cage Q, and (ii) membranes R.
(c) How much is x?
(d) Name the organs S.
(e) What are the reflexes involving structure P only known as?
Write down the following activities in the correct order for a simple reflex arc:
(a) impulse travels in the motor fibre
(b) impulse travels in the sensory fibre
(c) effector organ stimulated
(d) impulse crosses the synapse
State whether the following is simple reflex, conditioned reflex or neither of the two:
Lifting up a book: …………………..
What is a reflex action?
What kind of reflex is cycling?
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
