Cell 565 final

Which of the following second messengers, when released by phospholipase C, will directly activate protein kinase C?

A.

IP3

B.

IP2

C.

DAG

D.

PIP2

DAG

What role does StAR play in steroidogenesis (steroid hormone synthesis)? (Click all that apply.)

Select all that apply

Required for cholesterol transport into the mitochondria

Its action is required prior to pregnenolone synthesis

Many hormones are transported through the blood bound to carrier proteins. What two major effects do these carriers have on hormone action? (Select all that apply.)

A.

The increase hormone activity

B.

They decrease hormone activity

C.

They prevent hormone degradation

D.

The stimulate hormone degradation

b&c

Many growth factors are released from cells in small amounts, then act locally on neighboring and diverse cells without having to enter the blood. This is classified as:

Paracrine function