Hormones

Q.

What are the three hormones that regulate the urine volume?

Q. Chemical substances secreted by the endocrine system are called .

1. enzymes
2. hormones
3. plasma

Q.

Which among the following has both endocrine and exocrine character?

1. Liver

2. Thyroid

3. Pancreas

4. Hypothalamus

Q.

Define hormones and their role in our body? Why are they called chemical messengers [3 MARKS]

Q.

What is the role of Leydig cells in reproduction?

Q.

Which statement is not true about thyroxin?

1. Iron is essential for the synthesis of thyroxin.

2. It regulates the protein, carbohydrates and fat metabolism in the body.

3. The thyroid gland requires iodine to synthesize thyroxin.

4. Thyroxin is also called thyroid hormone.

Q. The sex hormones are under the control of hormones from the pituitary gland.

1. Gonadotropin Releasing Hormone (GnRH)
2. Thyroid Stimulating Hormone (TSH)

Q.

Difference between DNA and RNA

Q.

Which of the following statement(s) about hormones is/are true?

1. They are called chemical messengers.

2. They help in proper growth and development of the body.

3. They are secreted in huge quantities.

4. They are carried by the blood.

Q.

What are the characteristics of hydrophilic hormone receptors?

Q.

Which hormone is released from mammary gland?

Q. Which of the following statement(s) is/are correct?

Statement 1: Hormones are chemicals that are responsible for certain changes in the body.

Statement 2: Hormones are produced at a particular part of the body called the target site.

1. Statement 1: True;
   Statement 2: False
2. Statement 1: True;
   Statement 2: True
3. Statement 1: False;
   Statement 2: True
4. Statement 1: False;
   Statement 2: False

Q.

Parathyroid hormone is involved in the metabolism of ___ .

Q.

Assertion: The dietary deficiency of iodine causes goitre.
Reason: Iodine is required for the formation of thyroid hormone.

1. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2. If both Assertion and Reason are correct but the Reason is not the correct explanation of Assertion.

3. If Assertion is correct but Reason is incorrect.

4. If Assertion is incorrect but Reason is correct.

Q.

Fill in the following blanks with suitable words :

(a) Sexual maturity is reached at___

(b) The changes which occur in boys and girls at puberty are brought about by various___

(c) Initially, girls grow___than boys.

(d) The changes occurring in body and mind during adolescence are a natural part of___up.

(e) The features which help us to distinguish between a mature boy and a girl are called___sexual characteristics.

(f) The onset of puberty is controlled by___

(g) Menstrual cycle in women is controlled by___

(h) Each normal body cell in humans contains___pairs of chromosomes out of which___pair is of sex chromosomes.

(i) X and Y chromosomes are called___chromosomes.

(j) Early marriage and motherhood cause health problems in the___and the___

(k) The protective foods are___and___

(l) Thyroid and adrenals secrete their hormones when they receive instructions from___gland through its hormones.

(m) Metamorphosis in amphibians is brought about by___hormone.

Q.

What are hormones ? Where are hormones made in the human body ?

Q.

Name the hormone which leads to the growth of beard in women.

Q.

What is the term used for secretions of endocrine glands responsible for changes taking place in the body?

Q.

The glands of the endocrine system do not have specific ducts to release hormones to the target site. Hormones reach their target organs with the help of the

1. Nervous system
2. Digestive system
3. Circulatory System
4. Integumentary system

Q.

Hormones are chemical messengers.

1. True
2. False

Q.

Which gland produces progesterone? What is its function?

Q. The secretion of testosterone and estrogen by testes and ovaries respectively is under the control of endocrine gland X. Endocrine gland X is ____________.

1. Thyroid
2. Adrenal
3. Pituitary
4. Pancreas

Q.

What are endocrine glands? What do they do?

Q. The changes which occur at adolescence are controlled by

1. Enzymes
2. Hormones

3. Balanced diet

4. None of these

Q. Production of thyroxin requires

1. Magnesium
2. Iodine
   
3. Bromine
4. Sodium

Q. Assertion(A): Hormones are similar to enzymes in their action and chemical nature.
Reason(R): Hormones and enzymes are proteinaceous in nature and act as informational molecules

1. Both A and R are true but R is not the correct explanation of A
2. Both A and R are true and R is the correct explanation of A
3. A is true but R is false
4. Both A and R are false.

Q.

Pick the odd one out of the following:

adrenaline / amylase / thyroxin / testosterone / oestrogen

Q.

Which of the below hormones are involved in regulating the menstrual cycle?

1. Luteinizing hormone

2. Progesterone

3. Follicle stimulating hormone

4. Oxytocin

Q.

Control centre for the body temperature, hunger and blood pressure.

Q.

What is the function of regulating hormones?