Animal Hormones

Q.

The hormone which regulates the basal metabolism in our body is secreted from?

1. Pancreas

2. Adrenal cortex

3. Thyroid

4. Pituitary gland

Q.

Mention any two differences between a hormone and an enzyme.

Q.

In humans, the life processes are controlled and regulated by

1. reproductive and endocrine systems

2. respiratory and nervous systems

3. endocrine and digestive systems

4. nervous and endocrine systems

Q.

Which is the target organ for both adrenaline and insulin ?

(a) heart

(b) kidney

(c) liver

(d) pancreas

Q. Plant appears to bend towards light due to:

1. concentration of auxins at root tip.
2. concentration of auxins at shoot tip.
3. diffusion of auxins towards the shady side of root.
4. diffusion of auxins towards the shady side of shoot.

Q. Which among the following is a ductless gland?

1. Salivary gland
2. Thyroid gland
3. Sebaceous gland
4. Mammary gland

Q.

Feeling the tremors of an earthquake a scared resident of the seventh floor of a multistoried building starts climbing down the stairs rapidly. Identify the correct hormone which is responsible for the initiation of this action?

1. Glucagon

2. Adrenaline

3. Thyroxine

4. Gastrin

Q. Give reason to explain why endocrine glands release their secretions into the blood directly

Q.

What hormone requires iodine for its production?

Q.

Which hormone increases blood pressure and why?

Q.

Which hormone has the longest half-life?

Q. The hormone that helps in the reabsorption of sodium and water in the body is

1. Testosterone
2. Progesterone
3. Aldosterone
4. Adrenaline

Q. Insulin is produced by adrenal glands.

1. True
2. False

Q.

Choose the odd one out-

Adrenal gland, liver, thyroid gland, pituitary gland.

Q.

Do you agree with the statement - "All hormones are chemical signals" ? Yes/No. Justify your answer.

Q.

Hormones are secreted into __.

Q.

Why is oxytocin given during labour?

Q. A plant always bends towards light. This is due to the action of a hormone called _____ and its found at _______.

1. gibberellins , end of shoots
2. auxin , tip of the leaves
3. auxin , shady parts of shoot
4. gibberellins , tip of the shoot

Q.

who discovered auxins??

Q. _ secrete(s) hormones that regulate blood sugar level.

1. Pancreas
2. Thymus
3. Hypothalamus
4. Ovary

Q.

Meaning and work of auxin

Q.

Which hormone controls the blood pressure in emergency?

1. Thyroxine

2. Prolactin

3. Insulin

4. Adrenaline

Q.

What are the functions of testosterone that vary during various developmental stages?

Q.

Name the hormone responsible for the following functions.

Regulates basal metabolism.

Q.

Which of the following statements about chemical communication is true?

1. The signal reaches all parts of the body.

2. Regardless of nervous communications, the impulse is transmitted persistently and steadily.

3. The compounds or hormones used for this communication show a great deal of diversity.

4. All of these.

Q. hormone is secreted by adrenal glands.

1. Adrenaline
2. Glucagon
3. Insulin
4. Thymine

Q. The hormone that helps in the reabsorption of sodium and water in the body is

1. Testosterone
2. Progesterone
3. Aldosterone
4. Adrenaline

Q. Which one of the following is a function of Oxytocin?

1. Decreasing the uptake of glucose from kidneys
2. Promoting the contraction of the uterus
3. Increasing the potency of spinothalamic tract
4. Increasing the uptake of sodium in the kidneys

Q. Changes of body features associated with puberty are mainly because of the secretion of _______ from ovary and testosterone from _______.

1. luteinizing hormone, vas deferens
2. oestrogen, fallopian tube
3. oestrogen, testes
4. aldosterone, testes

Q. $\begin{array}{cc}\text{Column A}& \text{Column B}\\ \left(i\right)\text{Lack of iodine}& \left(A\right)\text{Causes goitre}\\ \left(ii\right)\text{Person whose blood glucose is very high}& \left(B\right)\text{Estrogen}\\ \left(iii\right)\text{Lack of growth hormone}& \left(C\right)\text{Diabetic}\\ \left(iv\right)\text{Responsible for puberty in females}& \left(D\right)\text{Causes dwarfism}\end{array}$

1. (i) – A, (ii) – B, (iii) – D, (iv) –C

2. (i) – C, (ii) – D, (iii) – A, (iv) –B

3. (i) – D, (ii) – B, (iii) – A, (iv) –C

4. (i) – A, (ii) – C, (iii) – D, (iv) –B