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?132views
- Multiple ChoiceUnder what condition will a target cell always respond quickly to an extracellular signal?121views
- Multiple ChoiceWhere do diacylglycerol (DAG) and inositol trisphosphate (IP3) originate in the cell signaling pathway?129views
- Multiple ChoiceWhere are the receptors for hydrophilic hormones typically located?192views
- Multiple ChoiceWhich type of membrane-bound receptor requires an effector protein to initiate a signal transduction pathway?125views
- 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
533views - Multiple ChoiceWhich of the following correctly describes a second messenger?165views
- Multiple Choice
What is the role of G proteins in GPCR signaling?
1074views30rank - Multiple Choice
Hormones can bring about substantial physiological changes at very low concentrations. How does this relate to the concept of second messenger systems?
853views27rank - 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?
803views27rank - 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?
739views17rank1comments - Multiple ChoiceSteroid hormones influence cellular activities by __________.1578views
- Multiple ChoiceWhich of the following describes a hormone that CANNOT exhibit its full effect without the presence of another hormone?1014views
- Multiple ChoiceHow do protein kinases affect enzymes?1700views