Read the following statements: A. The cerebral aqueduct passes through the cerebrum. B. The cones are responsible for photopic vision, while the rods allow scotopic vision. C. The ampulla is found in the base of the semi-circular canals and its special receptors help in hearing. How many of the given statements are correct?

Question

Read the following statements: A. The cerebral aqueduct passes through the cerebrum. B. The cones are responsible for photopic vision, while the rods allow scotopic vision. C. The ampulla is found in the base of the semi-circular canals and its special receptors help in hearing. How many of the given statements are correct? (A) None (B) One (C) Two (D) Three

Tardigrade Admin · Accepted Answer

There are two types of photoreceptor cells, namely, rods and cones. These cells contain the light-sensitive proteins called the photopigments. The daylight (photopic) vision and colour vision are functions of cones and the twilight (scotopic) vision is the function of the rods.
The midbrain is located between the thalamus/hypothalamus of the forebrain and pons of the hindbrain. A canal called the cerebral aqueduct passess through the midbrain.
The vestibular apparatus is composed of three semi-circular canals and the otolith. Each semi-circular canal lies in a different plane at right angles to each other. The membranous canals are suspended in the perilymph of the bony canals. The base of canals is swollen and is called ampulla, which contains a projecting ridge called crista ampullaris which has hair cells. The saccule and utricle contain a projecting ridge called macula. The crista and macula are the specific receptors of the vestibular apparatus responsible for maintenance of balance of the body and posture.