English Medium Class 10 - CBSE Question Bank Solutions

There are two similar glands P which are located on top of two similar organs Q in the human body. P are often called the emergency glands and they secrete a hormone R into the blood stream. R is secreted in large amounts when a person is frightened. It brings about temporary changes in the body which allow a lot of substance S from the liver to go into the blood to provide a lot of energy in a very short time. This helps a person to fight back or run away from the frightening situation.

What are P, Q, R and S?

A and B are two pairs of glands that are present in the human endocrine system. The pair A is found only in females, whereas B is present only in males. Glands A make and secrete two hormones C and D, whereas glands B make and secrete only one hormone E. In addition to hormones, Glands A make gametes F, whereas glands B make gametes G.
(a) What are the glands A?
(b) What are the hormones C and D?
(c) What are the glands B? Name the hormone E.
(d) What are the gametes F and G?
(e) Which event in the life of males and females is associated with the secretion of the hormones C, D and E?

A squirrel is in a scary situation. Its body has to prepare for either fighting or running away. State the immediate changes that take place in its body so that the squirrel is able to either fight or run?

The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?

A diabetic patient suffers from the deficiency of which hormone?

Which hormone regulates the ionic balance in the body?

Assertion: On attaining puberty, breast size increases and reproductive organs develop in females.

Reason: Ovaries release the hormone progesterone in females.

The hormone which increases fertility in males is called:

A doctor advised a person to take an injection of insulin because:

Name the gland and the hormone secreted by it in scary situations in human beings. List any two responses shown by our body when this hormone is secreted into the blood.

An object of height 10 cm is placed 25 cm away from the optical centre of a converging lens of focal length 15 cm. Calculate the image distance and height of the image formed.

Name the hormone secreted in scary situations by animals. Write any three responses which enable the animal body to deal with it.

We are advised to take iodised salt in our diet by doctors. Justify its importance in our bodies.

A doctor has advised Sameer to reduce sugar intake in his diet and do regular exercise after checking his blood test reports. Which disease do you think Sameer is suffering from? Name the hormone responsible for this disease and the organ producing the hormone.

What is meant by a power of a lens? Define its SI unit. 

Define the power of a lens.

What does sign of power (+ve or –ve) indicate?

State power of a lens S.I. unit.