Multiple Choice
Where are peptide hormone receptors typically located in a cell?
62
views
16. The Endocrine System
Membrane Bound Receptors and Secondary Messengers
Back16. The Endocrine System
Membrane Bound Receptors and Secondary Messengers
- Multiple ChoiceWhat happens when a signaling molecule binds to a ligand-gated ion channel?77views
- Multiple ChoiceUnder what condition will a target cell always respond quickly to an extracellular signal?55views
- Multiple ChoiceWhere do diacylglycerol (DAG) and inositol trisphosphate (IP3) originate in the cell signaling pathway?38views
- Multiple ChoiceWhere are the receptors for hydrophilic hormones typically located?88views
- Multiple ChoiceWhich type of membrane-bound receptor requires an effector protein to initiate a signal transduction pathway?53views
- Textbook Question
Some hormones act by:
a. Increasing the synthesis of enzymes
b. Converting an inactive enzyme into an active enzyme
c. Affecting only specific target organs
d. All of these
472views - Multiple ChoiceWhich of the following correctly describes a second messenger?71views
- Multiple Choice
What is the role of G proteins in GPCR signaling?
834views21rank - Multiple Choice
Hormones can bring about substantial physiological changes at very low concentrations. How does this relate to the concept of second messenger systems?
646views22rank - Multiple Choice
You are studying how a hormone affects a cell and find that when oxytocin binds the receptor, the intracellular concentration increases. Based on this information, what could you logically conclude about this cell and hormone?
614views22rank - Multiple Choice
cAMP, , and DAG are all molecules that are used as secondary messengers. Which statement below correctly identifies a difference between the pathways in which they are found?
527views11rank1comments - Multiple ChoiceSteroid hormones influence cellular activities by __________.1488views
- Multiple ChoiceWhich of the following describes a hormone that CANNOT exhibit its full effect without the presence of another hormone?957views
- Multiple ChoiceHow do protein kinases affect enzymes?1620views