"Receptors and Sense Organs" PPT

Description

"Receptors and Sense Organs" PPT

Part One: Situation Import

Think about the scene when you eat, what did you feel at that time?

Can you tell how the above feeling came about? Which part of the body do they come from? What do these feelings mean for you as you complete the dining activity?

learning target

1. Describe the structure of the eyeball and the functions of each major component.

2. Describe the formation process of vision, the causes and correction methods of myopia and hyperopia, and know the prevention methods of myopia.

3. Understand the importance of eyes in understanding the world, consciously cultivate eye hygiene habits, protect vision, and prevent myopia; at the same time, care for and help people with visual impairments.

Receptors and sensory organs PPT, part 2 content: course exploration

Explore theme one

Eye structure and function

1. Structure of the eyeball

2. Functions of various parts of the eyeball

think

Some people compare the human eyeball to a camera. So what structures of the camera are equivalent to the structures of the human eyeball? Do you know what the imaging principle of a camera is?

Explore theme two

formation of vision

1. The formation principle of vision

think about it

1. Why can normal people see clearly no matter whether they are near or far objects?

2. How does the curvature of a person's lens change when he lowers his head to read a book to raises his head to look into the distance?

3. When looking at nearby objects, are the eyeballs in a state of fatigue or relaxation?

2. Myopia and hyperopia

normal eye

The light reflected from distant objects is refracted by the lens and forms an image that falls on the retina.

What is the difference between myopia and hyperopia viewing the same scene?

Myopia sees nearby objects clearly and distant objects blurry.

Hyperopia can see distant things clearly and close things blurry.

Receptors and sensory organs PPT, part three: training to meet standards

1. (2011·Heze Academic Examination) A student does not pay attention to eye hygiene and is addicted to video games. This will not only affect his study, but also cause myopia due to an increase in the convexity of a certain structure in the eyeball due to staring at the screen at close range. This structure is ( )

A.Lens B.Retina

C.Ciliary body D.Vitreous body

2. (2011·Suzhou Academic Examination) In the process of vision formation, the light generated by external objects forms object images and finally the places where vision is produced are ( )

A. Cornea, visual center of the brain

B. Retina, retina

C. Retina, visual center of the brain

D. The visual center of the brain, the visual center of the brain

Keywords: Beijing Normal University Edition Biology PPT courseware for seventh grade volume 2 free download, receptors and sensory organs PPT download, .PPT format;

For more information about the "Human Body's Self-Regulating Receptors and Sensory Organs" PPT courseware, please click the Human Body's Self-Regulating ppt Receptors and Sensory Organs ppt tag.

"Receptors and Sense Organs" PPT download:

"Receptors and Sensory Organs" PPT Download Part One: Course Knowledge Points Knowledge Point 1 Structure and Function of the Eyeball 1. Sensory Organs Receptors together with their auxiliary structures are called sensory organs. For example, eyes and ears are sensory organs, and people receive 8 information from the outside world.

"Receptors and Sense Organs" PPT courseware:

"Receptors and Sense Organs" PPT courseware Part One: Situation Introduction Students, what is this? How did you know? What did you use to see it, and how did you see it? How can you tell if this disc contains music or songs? Learning Objectives 1. Got...

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Update Time: 2024-09-30

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 2 industry PPT template

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