NBME F5 S2 T3

Prep for USMLE Forum

» Log in | Register

Forum

Step 1

Match

Prep4USMLE Forum » USMLE Step 1 Forum » Physiology Forum

NBME F5 S2 T3

Author

4 Posts

clar697
Forum Guru
avatar

Topics: 190
Posts: 199

07/01/08 - 07:32 AM

Which of the following signaling mechanisms is used to transmit the effects of triiodothyronine (T3)?

A) T3 binding activates a cell-surface adenylyl cyclase receptor
B) T3 binding activates a cell-surface guanylyl cyclase receptor
C) T3 binding activates the DNA binding activity of an intracellular receptor
D) T3 binds to a G protein-coupled receptor on the cell surface
E) T3 binds to a tyrosine kinase-linked receptor on the cell surface

microsporus
Forum Newbie

Topics: 0
Posts: 10

07/02/08 - 07:13 AM

DrNickSaysHello
Forum Newbie

Topics: 0
Posts: 13

09/25/08 - 04:28 PM

C - Thyroid hormone receptors are nuclear receptors, which are intracellular? C is the only answer that specifies this. Please correct me if I am wrong.

alirizvi
Forum Elite
avatar

Topics: 22
Posts: 372

09/30/08 - 08:25 PM

All steroid receptor bind to cytoplasmic receptor ( zinc finger protein ) then the complex goes to nucleus. I thought T3/T4 was the EXCEPTION that goes to nucleus directly. But i think i am wrong because thats not in the choice. So is it the other way around ?

___________________
We are what we repeatedly do. Excellence, therefore, is not an act, but a habit. - Aristotle.

You don't have permission to post.