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Question
Complete the following sentence with appropriate word :
A nerve chain between a receptor and an effector organ is called _________.
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Solution
A nerve chain between a receptor and an effector organ is called Reflex arc.
RELATED QUESTIONS
The number of pairs of nerves which arises from the spinal cord is:
Fill in the blank:
The three main parts of the brain are ................................ and ............................
Name the following:
Study of structure and functions of nervous system.
Name the following:
The neobrain.
Choose the correct answer.
Number of cranial nerves _____________
Draw well labeled diagram of a ‘Neuron’ and name the following parts:
(1) Node of Ranvier (2) Nissil granules (3) Cyton
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
Give a reason - Injury to medulla oblongata may prove fatal.
‘Injury to the medulla oblongata causes sudden death’ Explain.
The brain, the spinal cord and nerves form the nervous system.
