14.2 Mammalian Sense Organs | Cambridge O Level Biology Topic Questions 2023

1

1 mark

Which row of the table best describes receptor organs and their respective stimuli in the human body?

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1

1 mark

The image below shows the density of the two types of photoreceptor across a horizontal section of the retina.

14--image-5---eye-receptors

Which row of the table below correctly identifies the structures present in the eye according to the image above?

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1

1 mark

The image below shows some of the structures in the eye.

14--image-2---the-eye

The circular and radial muscles can control the size of the pupil in the eye.

How would they respond in the eye of a person walking from a brightly lit room into a dark one?

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	looking at near objects	looking at far objects	bright light	dim light
A	lens becomes flat	suspensory ligaments loosen	circular muscles relax	radial muscles contract
B	suspensory ligaments loosen	ciliary muscles relax	circular muscles contract	radial muscles contract
C	suspensory ligaments tighten	suspensory ligaments tighten	circular muscles relax	radial muscles contract
D	lens becomes round	ciliary muscles contract	circular muscles contract	circular muscles relax

1	The ciliary muscles contract.
2	The ciliary muscles relax.
3	The suspensory ligaments are pulled tight.
4	The suspensory ligaments are slackened.

Mammalian Sense Organs (Cambridge O Level Biology)