In the internal ear, the membranous labyrinth is filled with:

1. cerebrospinal fluid
2. plasma
3. endolymph
4. perilymph

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B

Which one of the following is the correct difference between rod cells and cone cells of our retina?

A gymnast is able to balance his body upside down even in total darkness because of
1. Cochlea
2. Vestibular apparatus
3. Tectorial membrane
4. Organ of corti

Match the following columns and select the correct option

Match the following columns and select the correct option :

An age-related condition when the eye's lens doesn't change shape as easily as it once did [Presbyopia] is usually caused by:
1. decreasing the flexibility of the lens
2. an eyeball that is slightly too short
3. an eyeball that is slightly too long
4. a cornea with asymmetric curvature

The neuron in humans with many nerve fibers arising from its cell body and that carries impulses to the effectors would be called as:

Branched protoplasmic extensions of a nerve cell that propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron are the:

The number of cranial nerves in humans is: