Question

1. Why does food not taste good when we have a cold?
2. How do eyelids and eyelashes help the eye?
3. What is reflex action ? How is it different from other actions ?
4. How does brain convey message to different body parts?
5. What are sense organs ? Give one function of each.
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Answer 1

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1) When we're sick, our noses are often blocked with mucus. Also, the tissues inside our nose can become swollen and inflamed. This prevents us from smelling properly. Because your sense of smell is so tied to your sense of taste, if you can't smell things properly, you won't be able to taste them properly, either.

2) Eyelashes keep insects and foreign particles away from the eye by acting as a physical barrier and by causing the person to blink reflexively at the slightest sensation or provocation. The upper and lower eyelids are thin flaps of skin and muscle that can cover the eye.

3) Involuntary action is the set of muscle movement which do not require thinking. But it is controlled by brain for example beating of heart beat. While on the other hand, the reflex action is rapid and spontaneous action in response to any stimulus which doesn't involve brain.

4)Muscles move on commands from thebrain. Single nerve cells in the spinal cord, called motor neurons, are the only way the brain connects to muscles. When a motor neuron inside the spinal cord fires, an impulse goes out from it to the muscles on a long, very thin extension of that single cell called an axon.

5) The sense organs are the body organs by which humans are able to see, smell, hear, taste, and touch or feel. The five sense organs are the eyes (for seeing), nose (for smelling), ears (for hearing), tongue (for tasting), and skin (for touching or feeling).

Answer 2

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Usually the reason you have lost your sense of taste is because of a temporary sickness, something like a cold, flu or infection. When you are suffering with these, your nose becomes blocked and / or congested and this reduces the amount of air coming through your airways