Receptors and Messengers
About the Lecture
The lecture Receptors and Messengers by Kevin Ahern, PhD is from the course Hormones and Signal Transduction. It contains the following chapters:
- Receptors
- Receipt of Message
- Second Messengers
Included Quiz Questions
Which statement regarding hormone receptors is true?
- They change shape when binding occurs.
- They are always membrane bound.
- They change shape on binding to another receptor.
- They require co-factors to be stimulated.
- They are specific to a single type of substance.
Which statement regarding second messengers is true?
- They use covalent interactions to modify proteins.
- They use hydrogen interactions to modify proteins.
- They carry messages out of cells.
- They use van der Waals forces to modify proteins.
What acts as a second messenger inside the cell? Select all that apply.
- Inositol-1, 4, 5-triphosphate
- Deoxyribose nucleic acid
- cAMP
- cGMP
- Ca+2 ions
What kind of modification occurs during the communication of signals via the second messenger molecules in the case of non-steroid hormones?
- Covalent changes in protein molecules.
- Hydration of protein molecules.
- Dehydration of protein molecules.
- Conversion of triple bonds to double bonds between the 2 carbon atoms of a protein molecule.
- Conversion of triple bonds to single bonds between the 2 carbon atoms of a protein molecule.
Which statement regarding phospholipase C is true?
- An activated phospholipase C enzyme catalyzes the breakdown of the PIP2 molecule to IP3 and DAG.
- Phospholipase C protein acts as a second messenger that directly stimulates the gene expressions by binding with the DNA molecules.
- Phospholipase C protein acts as a second messenger molecule for the synthesis of PIP2 from DAG and IP3.
- Phospholipase C acts as an energy source for the transduction of extracellular response toward the Golgi apparatus.
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Author of lecture Receptors and Messengers
Kevin Ahern, PhD
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Thank you Dr. Kevin Ahern!!! Sometimes you speak so fast, but these time was perfect :)
