Test on Reflexes and Human Eye Anatomy
Reflexes and Human Eye Anatomy: A Student's SEO Guide
Test: Human Vision and Reflexes
20 questions
Question 1: In a reflex arc, after a stimulus is detected by receptors, an impulse is sent along a sensory neurone to the Central Nervous System (CNS).
A. Ano
B. Ne
Explanation: When a stimulus is detected by receptors, an impulse is sent along a sensory neurone to the CNS, where the sensory neurone passes the message to a relay neurone.
Question 2: The cornea reflects light, bending it into the eye.
A. Ano
B. Ne
Explanation: The study materials state that 'The CORNEA reflects (bends) light into the eye.'
Question 3: When exposed to very bright light, the radial muscles of the iris contract to make the pupil smaller.
A. Ano
B. Ne
Explanation: In very bright light, circular muscles in the iris contract to make the pupil smaller. Radial muscles contract in dim light to make the pupil bigger.
Question 4: The iris reflex in dim light involves the brain telling the circular muscles to contract, which makes the pupil bigger.
A. Ano
B. Ne
Explanation: In dim light, the brain tells the radial muscles to contract, which makes the pupil bigger. Circular muscles contract in bright light to make the pupil smaller.
Question 5: The brain instructs the circular muscles of the iris to contract, causing the pupil to become larger in dim light.
A. Ano
B. Ne
Explanation: In dim light, the brain tells the radial muscles to contract, which makes the pupil bigger. The circular muscles contract in bright light to make the pupil smaller.