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प्रश्न
Nervous system is absent in _____________.
उत्तर
Nervous system is absent in plants.
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संबंधित प्रश्न
What is a synapse?
Electrical impulse travels in a neuron from:
The organ A which is located inside the skull of our body is protected by a bony shell B. It is surrounded by three layers membranes C. The spaces between these layers are filled with a liquid D which protects organ A from mechanical shocks. Organ A in combination with another organ E makes up the central nervous system.
(a) What is organ A?
(b) What are B, C and D?
(c) Name the organ E.
(d) While walking barefoot, if we happen to step on a sharp piece of stone, we immediately lift our foot up. Which of the two organs: A or E, is directly involved in this action?
(e) If we step out from a darkened room into bright sunlight, we close our eyes for a moment. Which of the two organs: A or E, is directly involved in this action?
Fill in the blank:
Sense organs have special cells called ____________ for picking up information and transmitting it to the nerves.
Draw a labelled diagram to show the structure of skin.
Draw a labelled diagram of eye.
Mention the three functions of the spinal cord.
Find the odd-one-out, giving reasons:
Axon, cell body, dendrite, cerebellum
Compare the nervous system and the endocrine system.
Differentiate between following pair with reference to the aspect in bracket.
sympathetic nervous system and para – sympathetic nervous system (overall effect on body)
Draw the following diagram:
Draw a neat labeled diagram of a neuron.
What are thermoreceptors?
Complete the following sentence with appropriate word :
There are _______ neurons in our body.
Complete the following sentence with appropriate word :
Optic nerve is a type Sensory nerve, whereas spinal nerves are __________ nerves
What does the cerebellum of the brain control?
Degeneration of dopamine producing neurons in the CNS causes ______ disease.
Pons helps in regulating respiration.
Identify the lobe which has centre for visual functions.
Identify the labels (i- iii) in the T.S. of the spinal cord.
The outermost layer of meninges:
