Chapter 7 – Control and Coordination

Assertion: Brain is a delicate organ which is protected from injury.
Reason: The bony box protects the brain from any shock.

Assertion: Reflex Arc works faster than thinking process of brain.
Reason: Reflex Arc works in case of those animals who donot have thinking process.

Which of the following acts as both endocrine and exocrine glands?

Which of the following is not associated with growth of plant?

Which hormone regulates the ionic balance in the body?

The main effect of cytokinin in plants is to

Reflex actions are mediated through

How many pairs of cranial nerves are present in man?

Any change in the environment to which an organism responds is called

The highest coordinating centre in the human body is

Which of the following is a plant hormone?

Which part of nervous system controls the reflex activities of the body?

A part of the body which responds to the in-structions sent from nervous system is called

The substance that result into the fall of mature leave and fruits from plants is due to :

Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells?

Breathing is controlled by which part of the brain?

Which of the following acts as both endocrine and exocrine gland?

The main function of abscisic acid in plants is

Movement of sunflower in accordance with the path of Sun is due to

Response of plant roots towards water is called:

Which plant hormone promotes dormancy in seeds and buds?

Roots of plants are:

Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electro chemical means to convey information from cell to cell.

Assertion: On attaining puberty, breast size increases and reproductive organs develop in females.
Reason: Ovaries release hormone proges-terone in female.

Assertion: Impulse travels from dendrite to cell body and then along the axon to its end.
Reason: Information acquired at the end of the dendrite tip of a nerve cell sets of an electric impulse.

Which of the following is not a ductless gland?

Which endocrine gland is also known as ‘master gland’?

Ageing in human beings is caused by disappearance of which of the following glands?

Which statement is incorrect about auxins?

The hormone that is used to keep flowers fresh is