Biology 0610 · IGCSE
Sense organs
97 practice questions on Sense organs, with worked solutions and instant marking.
Which structure of the human eye responds to light?
Feb/March 2016
Within the eye, the fovea contains three types of cone cells, each absorbing light of a different colour. Which row is correct?
Feb/March 2016
Which description of the way the pupil of the eye becomes smaller is correct?
Feb/March 2018
Which structure regulates how much light enters the eye?
Feb/March 2019
The diagram shows a cross-section of part of the human eye. What happens when a person looks at an object that is far from their eye?
Feb/March 2019
Which row shows the condition of the ciliary muscles and suspensory ligaments when the eye is focusing on a nearby object?
Feb/March 2020
Sensory neurones relay impulses from
Feb/March 2021
The diagram illustrates a cross-section of human skin. Which row correctly pairs the labelled part with its function?
Feb/March 2021
The eye functions as a sense organ and is a component of the nervous system.
Feb/March 2023
Which part concentrates light onto the retina?
Feb/March 2024
The diagram illustrates the structure of the human eye. Which labelled part bends light as it enters the eye?
Feb/March 2024
The eye is a [BLANK] organ. The eye is formed from a group of [BLANK]. The [BLANK] cells in the retina detect light.
Feb/March 2024
What function does the iris have?
Feb/March 2025
A particular eye disorder can lead to the ciliary muscles staying permanently contracted. Which row shows the correct features for an eye with this disorder when compared with an eye that does not have it?
Feb/March 2025
The diagram illustrates a cross-section of an eye. Which part controls the amount of light entering the pupil?
May/June 2016
The diagram illustrates how the density of rods and cones varies along a horizontal cross-section of the retina. Where is the optic nerve located?
May/June 2016
The diagram illustrates the density of rods and cones along a horizontal cross-section of the retina. At what position is the optic nerve located?
May/June 2016
The diagram illustrates the distribution of rods and cones along a horizontal cross-section of the retina. Where is the optic nerve located?
May/June 2016
Which part of the eye is sensitive to light?
May/June 2017
What number of distinct types of cone receptor and rod receptor are found in the human retina?
May/June 2017
What responses take place in the iris of the eye when a person moves from a dimly lit area into a brightly lit area?
May/June 2017
Which part of the eye is sensitive to light?
May/June 2017
Fig. 1.1 contains a diagram of the eye.
May/June 2017
The diagram illustrates the structure of human skin. Identify X, Y and Z.
May/June 2018
Which row shows accommodation when a near object is being viewed?
May/June 2018
The diagram illustrates a cross-section of an eye. Which statement is correct when a person looks at a nearby object?
May/June 2018
Several parts of the eye are given below. 1 cornea 2 iris 3 lens 4 retina Which of these structures contain light receptors?
May/June 2019
Which statement about light receptors in the retina of a normal human eye is correct?
May/June 2019
The diagram illustrates a cross-section of the human eye. Which label indicates the part of the eye where vision is most acute?
May/June 2019
The diagram presents a vertical cross-section of part of a human eye. A fly is moving closer towards the eye. The eye starts to focus the fly’s image onto its retina. How do the labelled parts of the diagram change?
May/June 2019
Which part regulates how much light is allowed into the eye?
May/June 2021
The iris of a person has been damaged. What impact would this have?
May/June 2021
What kind of cell must an organ have in order to detect a stimulus?
May/June 2021
The diagram illustrates how an eye looks in bright light. Which row correctly shows the state of the iris muscles in bright light?
May/June 2021
What structure in the eye brings light into focus on the retina?
May/June 2022
Which part of the eye contains the largest concentration of cells that enable humans to see colour?
May/June 2022
The diagram illustrates the distribution of rods and cones across a section of the retina. Where is the fovea located?
May/June 2022
Define what is meant by the term sense organ.
May/June 2022
The eye can focus on objects that are close by or far away. Fig. 3.1 illustrates the parts of the eye used in focusing. The eye is currently focused on a distant object.
May/June 2022
Variations in light intensity lead to changes in the diameter of the pupil in the eye. Which rows show the pupil reflex?
May/June 2023
What happens during accommodation when focusing on distant objects?
May/June 2023
In a bright-light pupil reflex, which description best matches the way the iris muscles act?
May/June 2023
Which statements are correct about cone cells in the eye?
May/June 2023
State three further stimuli to which sense organs respond.
May/June 2023
Which part of the eye has light receptors?
May/June 2024
In a brightly lit room, what would the pupil size and lens shape be for someone reading a text message on a mobile phone?
May/June 2024
Which structure is made of cartilage?
May/June 2024
A person goes from a brightly lit area into a room that is dark. What changes take place in their eyes?
May/June 2024
What is meant by the term sense organ?
May/June 2024
When a person comes into contact with a hot object, structure P in the skin is triggered. As a result, an electrical impulse travels along structure Q to the central nervous system. Which row names structures P and Q?
May/June 2025
The diagram shows a cross-section of the human eye. Which label indicates the iris?
May/June 2025
Which row indicates the function of rod cells?
May/June 2025
The diagram shows a vertical cross-section of part of a human eye. A fly is moving closer to the eye. The eye starts to bring the image of the fly into focus on the retina. How do the labelled parts of the diagram change?
May/June 2025
The diagram shows a section through an eye. Which row is correct when a person is looking at a nearby object?
May/June 2025
The eye is one of the sense organs. Fig. 4.2 presents a diagram of the parts of the eye.
May/June 2025
The human retina has receptor cells named rods and cones. Fig. 2.1 illustrates the distribution of receptor cells in a human retina. Fig. 2.1 is a graph plotting number of receptors per mm$^2$ on the y-axis against distance from the fovea / arbitrary units on the x-axis. It displays separate curves for rods (solid line) and cones (dashed line). The fovea and blind spot are marked.
May/June 2025
What function does the cornea have?
Oct/Nov 2016
The diagram illustrates a slice through a human eye. Which type of cells, and at which location, are found in a high concentration to produce good colour vision?
Oct/Nov 2016
The diagram illustrates a vertical cross-section of the front portion of an eye as it focuses on a nearby object. Which description fits structures R and S?
Oct/Nov 2016
Define what is meant by the term sense organ.
Oct/Nov 2016
Which one functions as a sense organ?
Oct/Nov 2017
Which row indicates the function of rod cells?
Oct/Nov 2017
The diagram illustrates the structure of the eye. Which part refracts light?
Oct/Nov 2018
The diagram illustrates how the iris and pupil look under three different lighting conditions. Which row indicates the size of the eye’s pupil in each lighting condition?
Oct/Nov 2018
The diagram illustrates the eye’s structure. Which part refracts light?
Oct/Nov 2018
The diagram illustrates how the iris and pupil look in three different lighting conditions. Which row shows the size of the eye’s pupil in each lighting condition?
Oct/Nov 2018
The eye is a sense organ that reacts to light. Fig. 4.1 is a sectional diagram of the human eye, and the labelled parts are Q, R, S, T, U, W, X and Y.
Oct/Nov 2018
In sense organs, what type of cell is present?
Oct/Nov 2019
The diagram shows a person's eye in a brightly lit room. What changes occur to distance P and distance Q when this person goes from the brightly lit room into a dark room?
Oct/Nov 2019
The diagram illustrates the muscles that regulate the pupil’s size in an eye. By what mechanism do the muscles reduce the pupil’s diameter?
Oct/Nov 2019
The diagram illustrates the muscles responsible for controlling the pupil’s size in an eye. In what way do the muscles reduce the size of the pupil?
Oct/Nov 2019
The diagram illustrates the muscles that control the size of the pupil in an eye. By what mechanism do the muscles reduce the pupil’s diameter?
Oct/Nov 2019
Complete Table 8.1 by giving the names of the terms described.
Oct/Nov 2019
The eye is a sense organ containing receptor cells that react to light.
Oct/Nov 2019
The diagram illustrates a cross-section of the skin. Which labelled structure is a hair erector muscle?
Oct/Nov 2021
A student carried out an investigation into how altering light intensity affected the diameter of the pupil in the eye. The table presents the findings. Initial pupil diameter $= 8\,\text{mm}$, final pupil diameter $= 2\,\text{mm}$. Which explanation of the student’s results is correct?
Oct/Nov 2021
Which part of the eye alters its size in response to changes in light intensity?
Oct/Nov 2021
While reading a book, our eyes accommodate so that nearby objects can be seen. Which statement is correct when a near object is viewed?
Oct/Nov 2021
What changes occur in the muscles of the iris when a person goes from a brightly lit room into a dimly lit room?
Oct/Nov 2021
Fig. 1.1 is a diagram showing the parts of the eye. The boxes on the left-hand side give the letters for the parts of the eye in Fig. 1.1. The boxes on the right-hand side list some functions of parts of the eye.
Oct/Nov 2021
Which structure can decrease the amount of light that enters the eye?
Oct/Nov 2022
The diagram shows a cross-section of human skin. What are the structures indicated by X, Y and Z?
Oct/Nov 2022
Which structure in the eye refracts light?
Oct/Nov 2022
A person goes from a place with dim light into a place with bright light. What happens to the pupils in the person’s eyes?
Oct/Nov 2022
Which structure can decrease the amount of light that enters the eye?
Oct/Nov 2022
The diagram illustrates a cross-section of human skin. Which structures are labelled X, Y and Z?
Oct/Nov 2022
Which section of the eye senses red light?
Oct/Nov 2023
The diagram illustrates a cross-section of a human eye. Which structure alters its shape in response to adrenaline?
Oct/Nov 2023
Which statement concerning rods and cones in the eye is correct?
Oct/Nov 2023
State two features that make amphibians different from every other vertebrate group.
Oct/Nov 2023
Which changes take place in the iris of the eye when a person moves from a brightly lit area into a dimly lit area?
Oct/Nov 2024
How many distinct kinds of cone cells are present in the human eye?
Oct/Nov 2024
Fig. 7.1 illustrates the reflex arc that operates when a person steps on a pin.
Oct/Nov 2024
Which structure in the eye alters the direction of light as it enters the eye?
Oct/Nov 2025
As the eye goes from a region of low light intensity into one with high light intensity, what happens to the circular and radial muscles of the iris?
Oct/Nov 2025
A person is observing a distant object in a dimly lit area. The person then moves into a well-lit area and looks at a nearby object. Which statement describes some of the changes that occur in the person’s eyes?
Oct/Nov 2025
Which row indicates the condition of the ciliary muscles and suspensory ligaments as the eye focuses on a close object?
Oct/Nov 2025