Multiple Choice
Where are peptide hormone receptors typically located in a cell?
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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?154views
- Multiple ChoiceUnder what condition will a target cell always respond quickly to an extracellular signal?146views
- Multiple ChoiceWhere do diacylglycerol (DAG) and inositol trisphosphate (IP3) originate in the cell signaling pathway?163views
- Multiple ChoiceWhere are the receptors for hydrophilic hormones typically located?223views
- Multiple ChoiceWhich type of membrane-bound receptor requires an effector protein to initiate a signal transduction pathway?155views
- 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
557views - Multiple ChoiceWhich of the following correctly describes a second messenger?184views
- Multiple Choice
What is the role of G proteins in GPCR signaling?
1155views33rank - Multiple Choice
Hormones can bring about substantial physiological changes at very low concentrations. How does this relate to the concept of second messenger systems?
927views31rank - 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?
851views29rank - 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?
803views18rank1comments - Multiple ChoiceSteroid hormones influence cellular activities by __________.1603views
- Multiple ChoiceWhich of the following describes a hormone that CANNOT exhibit its full effect without the presence of another hormone?1040views
- Multiple ChoiceHow do protein kinases affect enzymes?1725views