Advertisements
Advertisements
प्रश्न
Draw the structure of a neuron.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
What is the function of receptors and effectors in our body?
What is a neuron?
Multiple choice question. Tick (✓) the correct choice:
Nervous system in humans consists of
- brain and nerves
- brain and spinal cord
- brain, spinal cord and nerves
- none of the above
Find the odd-one-out, giving reasons:
Axon, cell body, dendrite, cerebellum
Define the following:
Motor neuron:
What are the nerves? Mention the types of nerves found in humans.
Name the following :
(i) The layer of the eyeball that provides nourishment to the eye.
Define the following:
Action potential
Choose the correct answer.
Synapse is a close proximity of _______________
What are the functions of proprioceptors?
Describe the structure and location of various taste buds.
Give Technical Term:
The chemical messenger by which the nerve impulse travels from one neuron to the other.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’.
| Column I | Column II | ||
| (i) | Auditory canal | (a) | Channels pressure waves of air into the middle ear. |
| (ii) | Auditory (Eustachian tube) | (b) | Collects pressure waves of air. |
| (iii) | Auditory nerve | (c) | Converts pressure waves of air into vibrations of bone. |
| (iv) | Incus | (d) | Dissipates sound waves. |
| (v) | Malleus | (e) | Equalizes pressure between the middle ear and the atmosphere. |
| (vi) | Oval window | (f) | Provide information about the spatial orientation of the head. |
| (vii) | Pinna | (g) | Transfers vibrations from a bone to a fluid. |
| (viii) | Round window | (h) | Transfers vibrations from a bone to a membrane. |
| (ix) | Semi-circular canal | (i) | Transfers vibrations from a bone to a bone. |
| (x) | Stapes | (j) | Transfers vibrations from a membrane to a bone. |
| (xi) | Tympanic membrane | (k) | Transmits action potential to the auditory cortex. |
Short answer question
Rakesh got hurt on his head when he fell down from his motorbike. Which inner membranes must have protected his brain? What other roles do they have to play?
Short answer question
Give a reason - Injury to medulla oblongata may prove fatal.
Which cells of PNS secrete myelin sheath around the nerves?
The outermost of the three cranial meninges are ______
What is the amount of CSF present in and around the CNS?
There are ____________ lumbar spinal nerves.
Identify the match that pairs the nerve correctly with its type.
