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Now study Fig. (строение человеческого глаза), read the text below, and fill in the gaps with the appropriate word.

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Unit 2

SENSATION AND PERCEPTION

Chapter 1

SENSATION

WARM-UP

Do the crossword below to complete the introductory statement to the chapter:

This chapter examines sensation, the process that enables us to gather information from numerous sources. Sensation refers to the raw sensory data from the senses of

Across

 

3. the feeling that is produced by a particular food or drink when you put it in your mouth

5. the sense which you use to hear sounds

6. the quality that people and animals recognize by using their nose

 

Down

 

1. ability to see

2. the feeling you have when part of your body hurts

4. a state in which all your weight is evenly spread so that you do not fall

 

THINK ABOUT IT!

1. How many colors can we distinguish?

2. Which sense is more sensitive – taste or smell?

3. Does listening to loud music really damage the ears?

 

READING 1

Pre-reading

VISION

 

Different animal species depend more on some senses than on others. Dogs rely heavily on the sense of smell, bats on hearing, and some fish on taste. But for humans, vision ranks as the most important sense. As a result, it has received the most attention from psychologists. To understand vision, we need to look first at the parts of the visual system, beginning with the structure of the eye.

VOCABULARY FOCUS

Match the Russian terms with their English equivalents

1. Сетчатка a) Blind spot

2. Зрачок b) Cornea

3. Радужная оболочка c) Lens

4. Роговица d) Optic nerve

5. Хрусталик глаза e) Fovea

6. Тёмное пятно f) Retina

7. Ямка g) Iris

8. Зрительный нерв h) Pupil

 

Check your results with a partner.

While-reading

Now study Fig. (строение человеческого глаза), read the text below, and fill in the gaps with the appropriate word.

The structure of the human eye, including the cellular path to the brain, is shown in Fig.

 

Light enters the eye through the (1)______ (cornea), the transparent protective coating over the front part of the eye. It then passes through the (2)______, the opening through the center of the (3) _____, the colored part of the eye. In very bright light, the muscles in the (4)______ contract to make the pupil smaller and thus protect the eye from damage. This contraction also helps us see better in bright light. In dim light, the muscles relax to open the pupil wider and let in as much light as possible.

Inside the pupil light moves through the (5)_____, which focuses it onto the

(6)______, the light-sensitive inner lining of the back of the eyeball. The lens changes shape to focus on objects that are closer or farther away. Normally the lens is focused on a middle distance, at a point neither very near nor very far away. To focus on an object that is very close to the eyes, tiny muscles around the lens contract and make the lens rounder. To focus on something far away, the muscles work to flatten the lens.

On the retina and directly behind the lens lies a depressed spot called the (7)______.

The (8)______ ______ carries messages from each eye to the brain. The place on the retina where the axons of all the ganglion cells join to leave the eye is called the (9) _______.


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