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The figure below shows a signaling pathway activated by the binding of ådrenáline to the beta-adrenergic receptor. Binding of adrenaline to the receptor causes GTP-binding and activation of G proteins. Active GTP-boundG protein activates adenylate cyclase to initiate a signaling cascade that affects cellular responses, and includes cellular changes to mediate increased heart rate and accounts for the flight-or-fight response. activated adrenaline activated B-adrenergic receptor adenylate cyclase G protein subunit adenylate cyclase 2/ 3. GTP GDP conformational ATP CAMP change in receptor heterotrimeric G protein ACAMP inactive protein kinase A active protein kinase A cellular responses Consider the homozygous mutation in which a cell produces a variant of the adrenergic receptor that is constitutively active in the absence of ligand. Which of the following are true in this cell? Select all that apply. Protein Kinase A is always activated CAMP concentration is higher than normal Heart rate decreases Heart rate increases

The figure below shows a signaling pathway activated by the binding of ådrenáline to the beta-adrenergic receptor. Binding of adrenaline to the receptor causes GTP-binding and activation of G proteins. Active GTP-boundG protein activates adenylate cyclase to initiate a signaling cascade that affects cellular responses, and includes cellular changes to mediate increased heart rate and accounts for the flight-or-fight response. activated adrenaline activated B-adrenergic receptor adenylate cyclase G protein subunit adenylate cyclase 2/ 3. GTP GDP conformational ATP CAMP change in receptor heterotrimeric G protein ACAMP inactive protein kinase A active protein kinase A cellular responses Consider the homozygous mutation in which a cell produces a variant of the adrenergic receptor that is constitutively active in the absence of ligand. Which of the following are true in this cell? Select all that apply. Protein Kinase A is always activated CAMP concentration is higher than normal Heart rate decreases Heart rate increases

Human Anatomy & Physiology (11th Edition)
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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The figure below shows a signaling pathway activated by the binding of adrenaline to the beta-adrenergic receptor. Binding of adrenaline to the receptor causes GTP-binding and activation of G proteins. Active GTP-boundG protein activates adenylate cyclase to initiate a signaling cascade that affects cellular responses, and includes cellular changes to mediate increased heart rate and accounts for the flight-or-fight response. activated adrenaline activated B-adrenergic receptor adenylate cyclase adenylate cyclase G protein subunit GTP 3. GDP conformational ATP CAMP change in receptor heterotrimeric G protein ACAMP inactive protein kinase A active protein kinase A cellular responses Consider the homozygous mutation in which a cell produces a variant of the adrenergic receptor that is constitutively active in the absence of ligand. Which of the following are true in this cell? Select all that apply. Protein Kinase A is always activated CAMP concentration is higher than normal Heart rate decreases Heart rate increases
Transcribed Image Text:The figure below shows a signaling pathway activated by the binding of adrenaline to the beta-adrenergic receptor. Binding of adrenaline to the receptor causes GTP-binding and activation of G proteins. Active GTP-boundG protein activates adenylate cyclase to initiate a signaling cascade that affects cellular responses, and includes cellular changes to mediate increased heart rate and accounts for the flight-or-fight response. activated adrenaline activated B-adrenergic receptor adenylate cyclase adenylate cyclase G protein subunit GTP 3. GDP conformational ATP CAMP change in receptor heterotrimeric G protein ACAMP inactive protein kinase A active protein kinase A cellular responses Consider the homozygous mutation in which a cell produces a variant of the adrenergic receptor that is constitutively active in the absence of ligand. Which of the following are true in this cell? Select all that apply. Protein Kinase A is always activated CAMP concentration is higher than normal Heart rate decreases Heart rate increases
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