Vitamin A: Color Detection, Visual Cycle and Retinoic Acid Function
Über den Vortrag
Der Vortrag „Vitamin A: Color Detection, Visual Cycle and Retinoic Acid Function“ von Kevin Ahern, PhD ist Bestandteil des Kurses „Year 1 – Term 2 – Basic Principles of Medicine II – Endocrinology and Reproduction“. Der Vortrag ist dabei in folgende Kapitel unterteilt:
- Vitamin A and Color Detection
- Vitamin A and the Visual Cycle
- Retinoic Acid Function
Quiz zum Vortrag
Which statement regarding cone cells is true?
- They need strong direct light to detect colors.
- They are sensitive mostly to red light.
- They need less intense light than rod cells.
- Each cell of this type directly gives a signal.
- Cone cells can process indirect light.
Which statement regarding the return of isomerized retinal to its original state is true?
- It indirectly requires ATP.
- It requires conversion back to the all-trans state.
- It occurs on opsin.
- It requires glycolysis.
- It occurs inside the ciliary body.
Which enzyme participates in the recovery of the 11-cis retinal form during the visual cycle?
- Retinol isomerase
- Retinol polymerase
- Retinol depolymerase
- Retinol cyclase
- Retinase
Which statement regarding retinoic acid is true?
- It is obtained from retinal via a nonreversible oxidation reaction.
- It leads to dedifferentiation of the differentiated cells, thus acting as a major cause in cancer development.
- It is a storage form of vitamin A.
- It has a very strong anti-oxidant effect because it impacts the differentiation genes.
- It regulates the Sox gene during the development phase of the organism’s life.
Dozent des Vortrages Vitamin A: Color Detection, Visual Cycle and Retinoic Acid Function
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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thank you very much, nice lecture, sounds great, well presented
