"Feeling the World" PPT

Description

"Feeling the World" PPT

Part One: Review

Could you please raise your hands and tell me what sensory functions your skin has?

Characteristics of the sense of smell:

Over time, the brain's olfactory center will tire (adapt).

The olfactory sensitivity of different animals varies greatly.

Children's sense of smell is more sensitive than adults.

Animals also have different levels of sensitivity to the odors of different substances.

Sensory World PPT, Part 2: Characteristics of Smell

1. The brain's sense of smell will cause fatigue, because the olfactory center of the brain will be tired.

2. People's sense of smell will gradually weaken with age.

3. The olfactory sensitivity of different animals varies greatly.

4. Animals have different sensitivities to the odors of different substances.

Observe and think:

Which part of the structure in the picture should the "red bump" be?

What's inside the little bump?

Feeling the World PPT, Part 3: Think about it:

When a person has a cold, the sensitivity of the sense of smell is reduced, and the sensitivity of the sense of taste is also weakened. What does this mean?

Answer: Human sense of smell affects taste.

When a person has a cold, the mucous membrane in the nasal cavity covers the olfactory cells, making it difficult for the smell to stimulate the olfactory cells, thus reducing the sensitivity of the sense of smell.

The taste of food depends largely on the sense of smell. When a person has a cold, the sensitivity of the sense of smell is reduced, which affects the sensitivity of the sense of taste.

Feeling the World PPT, Part 4: Practice

1. How do you identify the following substances?

2. The child in the picture smells lemons and eats apples at the same time. What kind of taste will it produce?

A. Apple flavor;

B. lemon flavor;

C. Tasteless;

D. The taste of apple and lemon.

3. When food enters ( ), some chemicals in the food dissolve in ( ), stimulate ( ) cells, causing them to generate information, which are then transmitted to ( ) through ( ). After analysis, we know the taste of the food. .

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更新时间：2024-05-31

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