The endogenous ligand for an ion channel causesthe influx of 50 Na+ ions per second. This ionchannel has constitutive activity of 10 Na+ ions persecond. If drug A binds to the ion channel andcauses the influx of 50 Na+ ions per second, whichof the following categories best describes drug A?Group of answer choicesfull agonistantagonistpartial agonistinverse agonist

Answered: The endogenous ligand for an ion…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

The endogenous ligand for an ion channel causes
the influx of 50 Na+ ions per second. This ion
channel has constitutive activity of 10 Na+ ions per
second. If drug A binds to the ion channel and
causes the influx of 50 Na+ ions per second, which
of the following categories best describes drug A?
Group of answer choices
full agonist
antagonist
partial agonist
inverse agonist

Expert Solution

Step 1

Full agonist

Drugs that bind to the target receptor with affinity are considered agonists, and they also have intrinsic effectiveness (they change receptor activity to produce a response).

Antagonist

Antagonists bind to the target receptor but do not cause a reaction because they have affinity but no intrinsic effectiveness.

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