Mechanism Of Hormone Action

Which one of the following is not a second messenger in hormone action?

1. cGMP

2. Calcium

3. Sodium

4. cAMP

Which one of the following is an example of a negative feedback loop in humans?

1.	Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
2.	Secretion of tears after falling of sand particles into the eye
3.	Salivation of the mouth at the sight of delicious food
4.	secretion of sweat glands and constriction of the skin blood vessels when it is too hot

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?

1. Insulin and glucagon

2. Thyroxin and insulin

3. Somatosatin and oxytocin

4. Cortisol and testosterone

What is correct to say about the hormone action in humans?

1.	Glucagon is secreted by \beta -cells of the islet of Langerhans and stimulates glycogenolysis
2.	Secretion of thymosin is stimulates with ageing
3.	In females, FSH first binds with specific receptors on ovarian cell membrane
4.	FSH stimulates the secretion of oestrogen and progesterone

Which of the following is an amino acid derived hormone?
1. Epinephrine
2. Ecdysone
3. Estradiol
4. Estriol

How does steroid hormone influence the cellular activities?

1.	Using aquaporin channels as second messenger
2.	Changing the permeability of the cell membrane
3.	Binding the DNA and forming a gene-hormone complex
4.	Activating cyclic AMP located on the cell membrane

Match the following columns and select the correct option:

	Column-I		Column-II
(a)	Pituitary hormone	(i)	Steroid
(b)	Epinephrine	(ii)	Neuropeptides
(c)	Endorphins	(iii)	Peptides, proteins
(d)	Cortisol	(iv)	Biogenic amines

	(a)	(b)	(c)	(d)
1.	(iv)	(i)	(ii)	(iii)
2.	(iii)	(iv)	(ii)	(i)
3.	(iv)	(iii)	(i)	(ii)
4.	(iii)	(iv)	(i)	(ii)