Multiple Choice
Which of these acts as a second messenger in cellular signaling pathways?
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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 ChoiceWhere are peptide hormone receptors typically located in a cell?309views
- Multiple ChoiceWhat happens when a signaling molecule binds to a ligand-gated ion channel?259views
- Multiple ChoiceUnder what condition will a target cell always respond quickly to an extracellular signal?271views
- Multiple ChoiceWhere do diacylglycerol (DAG) and inositol trisphosphate (IP3) originate in the cell signaling pathway?270views
- Multiple ChoiceWhich of the following is true about water-soluble hormones?2251views
- Multiple ChoiceWhere are the receptors for hydrophilic hormones typically located?339views
- Multiple ChoiceWhich type of membrane-bound receptor requires an effector protein to initiate a signal transduction pathway?285views
- 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
843views - Multiple ChoiceWhich of the following correctly describes a second messenger?281views
- Multiple ChoiceWhich of the following describes a hormone that CANNOT exhibit its full effect without the presence of another hormone?1153views
- Textbook Question
A researcher observes that stimulation by a particular hormone induces a marked increase in the activity of G proteins in the target plasma membrane. The hormone being studied is probably:
(a) A steroid
(b) A peptide
(c) Testosterone
(d) Estrogen
(e) Aldosterone
757views - 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?
1129views33rank - Multiple ChoiceHow do protein kinases affect enzymes?1868views
- Textbook Question
How would blocking the activity of phosphodiesterase (PDE) affect a cell that responds to hormonal stimulation by the cAMP second messenger system?
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