Chemical Coordination and integration BIOLOGY - Chemical Coordination and integration

The 24 hour (diurnal) rhythm of our body such the sleep awake cycle is regulated by the hormone.

Compared to a bull a bullock is docile because of:

Leydig cells produce a group of hormones called:

Target cells.

Which of the following is both exo and endocrine gland:

Fill in the blanks:

Hormones	Target gland
Corticotrophin (ACTH)	__________________.

Fill in the blanks:

Hormones	Target gland
Gonadotrophins (LH, FSH)	__________________.

Write short notes on the functions of the following hormones:
Androgens.

Fill in the blanks:

Hormones	Target gland
Thyrotrophin (TSH)	__________________.

Fill in the blanks:

Hormones	Target gland
Hypothalamic hormones	__________________.

List the hormones secreted by the following:
Adrenal.

Define the following:
Endocrine gland.

Write short notes on the functions of the following hormones:
Parathyroid hormone (PTH)

Write short notes on the functions of the following hormones:
Thyroid hormones.

Define the following:
Hormone.

List the hormones secreted by the following:
Pituitary.

List the hormones secreted by the following:
Hypothalamus.

Briefly mention the mechanism of action of FSH.

Give scientific reasons of the following statements:

1. Adrenals are called glands of emergency.
2. Parathormone is also called Collip's hormone.
3. The hormones released by the posterior lobe of pituitary are not its own products.
4. Endocrine glands directly release their products into the blood.

A milkman is very upset one morning as his cow refuses to give any milk. The milkman’s wife gets the calf from the shed. On fondling by the calf, the cow gave sufficient milk. Describe the role of endocrine gland and pathway associated with this response?

Diagrammatically indicate the location of the various endocrine glands in our body.

Match the following:

	Column I		Column II
(a)	T4	(i)	Hypothalamus
(b)	PTH	(ii)	Thyroid
(c)	GnRH	(iii)	Pituitary
(d)	LH	(iv)	Parathyroid

Lakshita was studying endocrine system for her unit test. She was confused how hormones produce their effects on the target tissue.
She read many times, but still did not understand the process. She asked the same to her neighbour Stuti, a biology teacher in a school. Stuti explained her about the hormone receptor complex through diagrams and flowcharts.

1. Name the two types of receptors.
2. Why do different hormones use different types of receptors?
3. What are second messengers? Give two examples?
4. What values reflect from Lakshita's character?

Explain the following by giving scientific reasons:

1. Hypothalamus and pituitary function as an integrated and coordinated system.
2. Body growth is greatly accelerated at puberty in males.

What is the role of second messenger in hormone action?