Nervous System Biology - Nervous System

Meninges: ______

Cochlea : ________

Name the following:
The fluid that is present inside and outside the brain.

Name the following:
The opening through which light enters the eyes.

Name the cells of the retina that are sensitive to colours.

Give the main function of the following:
Lachrymal glands

Give the main function of the following:
Retina

Why does one feel blinded for a short while on coming out of a dark room?

Give two examples of reflex actions in our daily life.

Name the respective organs in which the following are located and mention the main function of each:
(i) Iris
(ii) Semicircular canals

Describe briefly the functions of medulla oblongata.

Distinguish between the following pair of words:
Grey matter and white matter

Given alongside is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow:
(i) Identify the defect.
(ii) Name the parts labelled 1, 2 and 3.
(iii) Give labelled two possible reasons for this eye defect.
(iv) Draw a labelled diagram to show how the above mentioned defect is rectified.

The diagram alongside represents a section of a mammalian eye.
(i) Label the parts 1 to 5 of the diagram.
(ii) State the function of the parts labelled 4 and 5.
(iii) With the help of a diagram show the short sightedness.

The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?

The diagram alongside represents the structure found in the inner ear. Study the same and then answer the questions that follow:
(i) Name the parts labelled A, B, C and D.
(ii) Name the parts of the ear responsible for transmitting impulses to the brain.
(iii) Name the part labelled above which is responsible for:
1. Static equilibrium. 2. Dynamic equilibrium. 3. Hearing
(iv) Name the audio receptor cells which pick up vibrations.
(v) Name the fluid present in the inner ear.

Draw a labelled diagram of the front view the human eye.

The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?

Match the terms of column I with those of column ll

Column l	Column ll
(i) Lens	(a) Adjustment of light rays
(ii) Lachrymal gland	(b) Vision
(iii) Olfactory epithelium	(c) Secretion of tear
(iv) Cochlea	(d) Balance of the body
(v) Semicircular canal	(e) Hearing
(vi) Eyes	(f) Smell

Vitreous chamber is present in ear in humans.

The part of the ear associated with balance is the cochlea.

Rods are the receptor cells in the retina of the eye sensitive to dimlight.

A convex lens is used for correcting myopia.

All voluntary actions are controlled by the cerebellum.