Actions of the Second Messenger and Protein Kinase A
Über den Vortrag
Der Vortrag „Actions of the Second Messenger and Protein Kinase A“ von Kevin Ahern, PhD ist Bestandteil des Kurses „Cell Signaling (Texas A&M FOM II 2020 Exam Unit 1)“. Der Vortrag ist dabei in folgende Kapitel unterteilt:
- Actions of the Second Messenger
- Protein Kinase A
Quiz zum Vortrag
Which statement regarding the regulation of glycogen metabolism is true?
- Glycogen synthase catalyzes glycogen formation.
- Phosphorylation activates all of the enzymes.
- Phosphorylation inactivates all of the enzymes.
- Glycogen synthesis and breakdown occur simultaneously.
What happens in the overview of the glycogen breakdown hormonal regulatory scheme? Select all that apply.
- The binding of epinephrine stops glycogen synthesis.
- When glycogen synthase is phosphorylated, it is active.
- When glycogen synthase is phosphorylated, it is inactive.
- The production of cAMP activates protein kinase A.
- The binding of epinephrine stimulates glycogen synthesis.
What does reciprocal regulation aim to do?
- Prevent the concurrent activity of 2 closely parallel metabolic pathways.
- Facilitate the concurrent activity of 2 closely parallel metabolic pathways.
- Prevent the concurrent inhibition of 2 separate metabolic pathways.
- Increase the rate of product formation.
- Decrease the rate of a reaction.
Which statements regarding protein kinase A (PKA) are true? Select all that apply.
- The phosphorylation of phosphorylase kinase enzyme by PKA leads to activation of glycogen breakdown.
- PKA is a structural protein essential for the maintenance of cell membrane morphology.
- The activated PKA enzyme inhibits glycogen synthesis by inactivating the glycogen synthase enzyme via the phosphorylation process.
- The activated PKA enzyme plays a crucial role in the reciprocal regulation of glycogen metabolism.
- Protein kinase A enzyme is composed of 4 subunits (2 regulatory and 2 catalytic).
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Dozent des Vortrages Actions of the Second Messenger and Protein Kinase A
Kevin Ahern, PhD
Dr. Kevin Ahern is a Professor in the Department of Biochemistry and Biophysics at Oregon State University (OSU), USA.
He obtained his PhD in Biochemistry from Oregon State University. Currently, he teaches courses for health sciences students at OSU.
He is co-author of three Open Educational electronic textbooks on Biochemistry and a Guide to Getting Into Medical School.
Due to his achievements, he earned OSU’s highest teaching recognition, the Elizabeth P. Ritchie Distinguished Professor Award in 2017.
Within Lecturio, Dr. Ahern teaches courses on Biochemistry and on "How to Get into Medical School”.
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