PollChapter 9

Question 1

Insulin is a peptide hormone produced by the pancreas. Even though it circulates throughout the bloodstream, it affects only certain cells and tissue. This data would suggest that ___

Answer 1

Target specificity is determined at the level of a receptor molecule on the surface of the cell.

Question 2

Since steroid hormones, such as estrogen and testosterone, are lipid soluble, they

Answer 2

Bind to receptors inside the cell

Question 3

G proteins are activated when

Answer 3

Hormone binds to the receptor that they are attached to

Question 4

The receptor for steroid hormones are located inside the cell instead of on the membrane surface like most other signal receptors. This is NOT a problem for steroids because

Answer 4

Steroid hormones are lipid soluble, so they can readily diffuse through the lipid bilayer of the cell membrane