StudyWithSmile — free flashcards, quizzes and exam practice for school students
Behind Sensations
Biology · Kerala SSLC (Class 10) · English Medium · 50 questions and answers
Sample questions
- Q: What is a stimulus?
- A: A stimulus is any change in the internal or external environment that produces a response in an organism, e.g. light, sound, heat or touch.
- Q: What are sensory receptors?
- A: Specialised cells or nerve endings that recognise stimuli. They produce electrical impulses (receptor potential) in response to stimuli, e.g. photoreceptors in the retina, chemoreceptors in taste buds.
- Q: Which part of the eye is sensitive to light?
- A: The retina, which contains the light-sensitive photoreceptor cells called rods and cones.
- Q: What is the function of rod cells and cone cells?
- A: Rod cells help in vision in dim light (and detect black and white); cone cells help in vision in bright light and detect colour.
- Q: What is the function of the iris and pupil?
- A: The iris is the coloured part of the eye that controls the size of the pupil, and the pupil is the opening that regulates the amount of light entering the eye.
Sign in free to study all 50 questions with flashcards, quizzes and spaced revision.