Nervous system and eye
Presentation
•
Biology
•
12th Grade
•
Practice Problem
•
Hard
Norfarhana teacher
FREE Resource
33 Slides • 26 Questions
1
2
Multiple Choice
Why are reflex actions important for survival?
They allow us to think before acting.
They help us respond quickly to danger.
They slow down our reactions to stimuli.
They only occur when we are asleep.
3
4
5
Open Ended
Describe the pathway of a nerve impulse in a reflex arc, starting from the receptor and ending at the effector.
6
7
8
9
Fill in the Blanks
The
Type answer...
10
Multiple Choice
Which part of the eye controls the size of the pupil to regulate the amount of light entering the eye?
Iris
Sclera
Conjunctiva
Retina
11
12
Multiple Choice
Which of the following is NOT a function of the tear gland?
Lubricate conjunctiva
Produce mucus
Wash away dust particles
Keep cornea moist
13
Open Ended
Explain how the external features of the eye help protect it from damage.
14
15
Multiple Select
Select all the parts of the eye that are involved in focusing.
Lens
Retina
Cornea
Aqueous chamber
16
17
Open Ended
Based on what you know about the functions of the various parts of the eye, what are some possible causes of blindness?
18
19
Multiple Choice
Which part of the eye is responsible for changing the thickness of the lens to focus light onto the retina?
Ciliary body
Cornea
Vitreous chamber
Optic nerve
20
21
Multiple Select
Select all the parts of the eye that help to keep the eyeball firm and refract light.
Aqueous chamber
Vitreous chamber
Choroid
Lens
22
23
Open Ended
Explain how the structure and function of the fovea contribute to detailed colour vision in bright light.
24
25
Multiple Choice
Which part of the eye transmits nerve impulses produced by photoreceptors to the brain?
Optic nerve
Blind spot
Rectus muscle
Lens
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27
Fill in the Blanks
The retina contains photoreceptors called
Type answer...
28
29
Multiple Choice
Which part of the eye is responsible for controlling the amount of light entering the eye?
Lens
Retina
Iris
Cornea
30
31
Open Ended
Q: Identify the stimulus and effector.
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33
Multiple Choice
Arrange the steps of the pupil reflex arc in the correct order.
Photoreceptors produce nerve impulses, stimulus occurs, nerve impulses transmitted to relay neurones, nerve impulses transmitted to motor neurones, nerve impulses transmitted to muscles of iris
Stimulus occurs, photoreceptors produce nerve impulses, nerve impulses transmitted to relay neurones, nerve impulses transmitted to motor neurones, nerve impulses transmitted to muscles of iris
Nerve impulses transmitted to relay neurones, stimulus occurs, photoreceptors produce nerve impulses, nerve impulses transmitted to motor neurones, nerve impulses transmitted to muscles of iris
Stimulus occurs, nerve impulses transmitted to relay neurones, photoreceptors produce nerve impulses, nerve impulses transmitted to motor neurones, nerve impulses transmitted to muscles of iris
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35
Fill in the Blanks
The circular muscles and radial muscles in the iris are described as
Type answer...
36
37
Open Ended
Explain how the iris controls the amount of light entering the eye in both bright and dim light.
38
39
Multiple Choice
Which terms should be used to describe the actions of muscles and the pupil when there are changes in light intensity?
Muscles contract and expand; pupil contracts and relaxes
Muscles contract and relax; pupil constricts and dilates
Muscles expand and relax; pupil contracts and relaxes
Muscles constrict and dilate; pupil contracts and relaxes
40
41
Multiple Choice
Which parts of the eye are responsible for refracting light rays onto the lens?
Cornea and aqueous humour
Lens and retina
Optic nerve and cornea
Retina and aqueous humour
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43
44
Open Ended
Describe the process by which the lens of the eye adjusts to focus on objects at different distances.
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46
Multiple Select
Select all the correct statements about the process of focusing on a distant object.
Ciliary muscles relax
Suspensory ligaments become taut
Lens becomes thinner and less convex
Lens becomes thicker and more convex
47
Multiple Choice
When focusing on a distant object, which of the following changes occur in the eye?
Ciliary muscles contract, lens becomes thicker
Suspensory ligaments slacken, lens becomes more convex
Ciliary muscles relax, lens becomes thinner and less convex
Lens becomes thicker and more convex
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49
Fill in the Blanks
Fill in the blank: When focusing on a near object, the ciliary muscles
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51
Open Ended
Using your knowledge of the human eye, can you explain why cataracts results in vision that is blurred with faded colour?
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59
Open Ended
Summarize what you have learned about reflex actions and their types. How do you think these reflexes help us in daily life?
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