Acetylcholine Receptor Interaction Quiz

Play an AI-generated podcast conversation about this lesson

What happens when a messenger binds to a receptor directly?

Modifies the receptor

Causes the cellular response to the messenger (correct)

Inhibits the cellular response

Leads to production of a second messenger

How does messenger binding to a receptor resemble substrate binding to an enzyme?

Both involve conformational changes in proteins (correct)

Both involve inhibition by antagonists

Both cause production of a second messenger

Both lead to negative responses in tissues

What determines the response of a cell to a messenger?

The type of receptor

The type of messenger

The number of receptors occupied (correct)

The tissue in which the receptor is located

Why can very low concentrations of messengers give a massive response in cells?

Due to high dissociation constant between ligand-receptor interaction Signup and view all the answers

What is released from the adrenal glands during stress?

L Signup and view all the answers

Which reaction occurs as a result of the L-R contact interaction?

Fight/Flight primitive reaction Signup and view all the answers

What is the role of G-protein in cell signaling?

Stimulates or inhibits intracellular enzymes Signup and view all the answers

Which ligand is bound in the ligand position of rhodopsin for vision?

Carotenoid molecule related to vitamin A Signup and view all the answers

What is the role of IP3 in signal transduction?

Releases Ca2+ from the endoplasmic reticulum Signup and view all the answers

Which protein does diacylglycerol (DG) activate in signal transduction?

Protein kinase c Signup and view all the answers

How is an external message transferred into the cell interior in signal transduction?

By changes in the electrical properties of the membrane Signup and view all the answers

What type of channels are involved in store-gated channels, according to the text?

Ca2+ ions channels Signup and view all the answers

What is the role of cholinesterase activity of the receptor?

Hydrolyzing acetylcholine Signup and view all the answers

What happens when acetylcholine binds to the receptor on the cell membrane?

The channel opens, allowing Na and K ions to flow through Signup and view all the answers

What is the function of cyclic AMP (cAMP) as a second messenger?

Mediating cellular responses Signup and view all the answers

What controls the adenyl cyclase enzyme in the amplification system?

Gs and Gi membrane G-protein complexes Signup and view all the answers