BIOLOGY M.C.Q (1 Marks)

Cornea is the Outermost part of the eye . It lies in front of the iris, the coloured part of the eye.

A motor nerve is a nerve that carries information from central nervous system or spinal nerves to the effector organ or gland to give response to the stimulus.

A neuron is the structural and functional unit of the nervous system. Neurons are similar to other cells in the human body in a number of ways, but there is one key difference between neurons and other cells. Neurons are specialized to transmit information throughout the body.

Schwann cells, Nissls granules and synaptic knobs are the parts of neurons.

Organ of corti are present on the sensory ridge of basilar membrane of cochlea. Hair cells which act as auditory receptors are present in organ of corti.

A synapse is a structure, that permits a neuron to pass an electrical or chemical signal to another neuron. These chemical or electrical signals can be inhibitory or stimulatory or conducting in nature.

In a photographic camera, image is formed on the film. Similarly, in eye, image is formed on the retina which is the light sensitive surface in the eye. The light rays enter the eye through an aperture called pupil. The eye lens which is biconvex, focus the light rays on the retina and an image is formed. Both the camera and eye have the ability to regulate the amount of light for image formation.

Autonomic Nervous System controls involuntary muscles. Swallowing is an involuntary action

Blind spot is the part where the optic nerve passes out of the retina. Photoreceptors are absent from this region.