Q: Hormones, Receptors and Second Messengers



Question H-01


A typical characteristic of hormones that use the second messenger mechanism is that:


a)     they can not pass through the plasma membrane

b)     the receptor is located in the cytosol

c)      the receptor is located in the nucleus

d)     the receptor is not necessary

e)     the receptor binds to the hormone to allow it to enter the cell



      Answer to H-01



Question H-02


Receptors for steroid hormones can be found:


a)     in the plasma membrane

b)     in the cytosol

c)      in the mitochondria

d)     in the ribosomes

e)     in the Golgi apparatus


 Answer to H-02



Question H-03


The binding of insulin to the insulin receptor triggers:


a)     the interaction of the receptor with a protein G

b)     the activation of  adenyl ciclase

c)      the activation of phospholipase C

d)     a decrease of GLUT4 in the plasma membrane

e)     tyrosine kinase activity


      Answer to H-03



Question H-04



Which of the of the following hormones use cAMP as second messenger?


a)     Insulin

b)     Thyroxin

c)      Progesterone

d)     Aldosterone

e)     Glucagon


Answer to H-04



Question H-05


Hormones that act through Phospholipase C activation, in fact are using three second messengers:



a)     cAMP, Diacylglycerol and Ceramide

b)     cAMP, , Ca++ and Diacylglycerol

c)      cAMP , Ca++ and Inositol 1,4,5 triphosphate

d)     cAMP, Diacylglycerol and Inositol 1,4,5 triphosphate

e)     cAMP, Ca++ and ceramide

f)       Ca++, Diacylglycerol and ceramide

g)     Ca++, Diacylglycerol and Inositol 1.4.5 triphosphate

h)    Ca++, Ceramide, Inositol 3,4,5 triphosphate

i)       Ceramide, Diacylglycerol and Inositol 1,4,5 triphosphate.


  Answer to H-05




6 thoughts on “Q: Hormones, Receptors and Second Messengers

  1. Pingback: Hormones: Answer to H-01 « The Biochemistry Questions Site

  2. Pingback: Steroid Hormones Receptors « The Biochemistry Questions Site

  3. Pingback: About Insulin/Receptor Interaction « The Biochemistry Questions Site

  4. Pingback: About Glucagon and cAMP « The Biochemistry Questions Site

  5. Pingback: G Protein-Phospholipase C Signal System « The Biochemistry Questions Site

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