A hormone that has intracellular receptors would be 
1. ACTH
2. ADH
3. Melatonin
4. Aldosterone

Hormones that act by interacting with intracellular include all the following except:
1. Thyroxin
2. Estrogen
3. Epinephrine
4. Cortisol 

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. Somatostatin and oxytocin

4. Cortisol and testosterone

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

1. cGMP                 

2. Calcium

3. Sodium               

4. cAMP

Which of the following is an incorrect statement

1. Hormones bind to specific proteins located in the target tissues only.

2. Receptors for hormones can only be present on the cell membrane

3. Each receptor is specific to one hormone only

4. Nuclear receptors are intracellular receptors