Question
Explain the Term: Reflex action

Answer

Reflex action is an action which is nearly instantaneous and not under the control of the will. The impulse passes from the sensory cells of the receptor organ along the dorsal root into the spinal cord. From here two messages pass simultaneously—one to the brain and the other travels out along the ventral root to reach the muscle which immediately responds

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The diagrams given below is an experiment conducted to study a factor necessary for photosynthesis. Observe the diagrams and then answer the following questions :

Image
(i) What is the aim of the experiment?
(ii) Identify the special condition inside the flask.
(iii) In what manner do the leaves 1 and 2 differ at the end of the starch test?
Which glands are responsible for the following disease?
(i) Goitre (ii) Diabetes mellitus (iii) Gigantism
(iv) Diabetes insipidus (v) Cretinism (vi) Exophthalmic goiter
Study the picture given below and answer the questions:
Image

(i) Identify the phenomenon illustrated in the picture.
(ii) Write the scientific name of the insect which was involved in the phenomenon.
(iii) Which moth population was more post-industrialisation, light or dark? Provide an explanation.
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
Name the parts numbered 1 to 6.
Name the two kinds of diabetes? Mention their symptoms and the causes. 
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?
LONG ANSWER
Mention three major scientific methods of population control.