Steroids and Bile Acids: Movement of Cholesterol
Über den Vortrag
Der Vortrag „Steroids and Bile Acids: Movement of Cholesterol“ von Kevin Ahern, PhD ist Bestandteil des Kurses „Cholesterol (Texas A&M FOM II 2020 Exam Unit 2)“.
Quiz zum Vortrag
Which of the following is true regarding lipid transport in the body?
- HDLs are the smallest.
- LDLs carry the most fat.
- Chylomicrons are made by the liver.
- VLDLs are the densest.
Which of the following is NOT true regarding hypercholesterolemia?
- Hypercholesterolemia is caused by the absorption of higher concentrations of fats, fat-soluble vitamins, and cholesterol from the small intestine by the fat cells.
- Hypercholesterolemia arises due to genetic abnormalities in APOB, LDLRAP1, and PCSK9 genes.
- Hypercholesterolemia is characterized by the presence of high levels of cholesterol and LDL in the bloodstream of the affected individual.
- In the hypercholesterolemia-affected person, the LDL signal-detecting receptors are usually defective, so the liver can’t sense the levels of LDL in the bloodstream.
- Hypercholesterolemia is an asymptomatic disorder; however, the prolonged elevation of cholesterol levels in the bloodstream leads to the hardening of the arteries.
The high levels of low-density lipoprotein complexes in the bloodstream are linked with which of the following?
- Atherosclerotic plaques
- Hypocholesterolemia
- Duchenne muscular dystrophy
- Down syndrome
- Polycystic kidney disease
Which of the following is NOT a correct statement?
- The high-density lipoproteins send a signal to liver cells to start the transportation of cholesterol from the stock of the stored fats to the various parts of the body.
- Low-density lipoproteins, when present at high levels, accumulate in the artery wall and get oxidized under the effect of reactive oxygen species.
- The oxidized LDLs are taken up by foam cells and lead to the development of atherosclerosis.
- High-density lipoproteins counteract atherosclerosis by removing cholesterol from foam cells.
- As HDLs inhibit the oxidation of LDLs by reactive oxygen species, they are considered good cholesterol.
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Dozent des Vortrages Steroids and Bile Acids: Movement of Cholesterol
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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Love this lecture. Dr. Ahern explains much better than my professor.
Very high-yield. Thank you for underlining this moment, crucial in treating hypercholesterolemia.
