B) Answer the following questions:-
i)How are the cytons and axon placed in the brain and the spinal cord.
ii)which part of the human ear gives 'dynamic balance and static balance to the body.
in) Explain how the human eye adapts itself to bright light and dim light.
iv) Sleeping under a tree at night is not advisable.
v) Define osmosis,
Answers
Answer:
(i) In brain cyton are placed outward and axon bundles internally. In spiral cord it is reversed. Grey matter is where neutrons bodies are located. White matter are the region which have axons.
(ii) inner ear
(iii) The human retina can perform its light-detection function in an astounding range of light intensities, from bright sunlight to dim starlight, by relying on two types of light-sensitive cells, or photoreceptors such as the Rhodopsin
(iv) the plants/trees leave carbon dioxide at night. On the basis of this it is that in the night if you sleep under the tree, you will not get oxygen, which can cause breathing problem, suffocation etc. Hence it is not advisable to sleep under the trees at night
(v) Osmosis is a process by which the molecules of a solvent pass from a solution of low concentration to a solution of high concentration through a semi-permeable membrane.