Cholesterol structure and function: Lipid biochemistry: Part 6: biochemistry

Lipid chemistry: Part 6: Cholesterol: Structure and function. Cholesterol is widely distributed in our body. It is the major component of the cell membrane and of lipoproteins. Cholesterol consists of four fused hydrocarbon ring A to D called the steroid nucleus, also known as cyclopentanone per hydro phenanthrene ring. To this steroid nucleus, an eight hydrocarbon chain attached to carbon 17 of the D ring. Ring A has a hydroxyl group at carbon 3, and ring B has a double bond between
carbon 5 and carbon 6. There are a total of 27 carbon atoms in cholesterol. Cholesterol is the
major sterol in animal tissues. Cholesterol has many important functions, for example, it is a component of cell membranes, and is a precursor of the bile salts and the steroid hormones like aldosterone, cortisol, testosterone, progesterone, and estrogens. Cholesterol is also a precursor for vitamin D. Whenever there is hypercholesterolemia, this excessive amount of cholesterol in the blood, deposited in arterial walls causing atherosclerosis.

⏱️TIMESTAMPS⏱️
00:00 Introduction
02:05 Structure of cholesterol
07:46 Functions of cholesterol

Liver function tests: https://www.youtube.com/playlist?list=PLITxL6KOIm-b2dZapxDPFjs0FKzyo6PTk
Diabetes and Insulin: https://www.youtube.com/playlist?list=PLITxL6KOIm-bBPqs-xnLVnMCO3nID1Rz7
Hemoglobin metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-YOZksTDXgmplYR5GMNxon8
Molecular biology: https://www.youtube.com/playlist?list=PLITxL6KOIm-a8IZFoGVd5voIn8zRYOvVv
Electron transport chain: https://www.youtube.com/playlist?list=PLITxL6KOIm-YNoCqQtPjZ5Cjm3tEi0YnW
Enzymes: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZMFFdL1Haf2fpaazQuM1eD
Digestion and absorption: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZzciIcbCyHt3wHZbiuDuO1
Carbohydrate chemistry: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZNbReHKD-S3kpjKAWHXIqG
Lipid chemistry: https://www.youtube.com/playlist?list=PLITxL6KOIm-aO94EbZQSqKTbO1YGeyX2S
Protein chemistry: https://www.youtube.com/playlist?list=PLITxL6KOIm-baCv9fkrnOm_32suZN2UCT
Lipid metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-YKYpZS679cCAIKnKQX9-vS
Acid-base disorders: https://www.youtube.com/playlist?list=PLITxL6KOIm-YlQWecLaP0YQRu7Q_H_m96
ABG interpretation: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZBCRGYTj5bb0QGQ1aK4fRp
Bilirubin metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZClrGdcDSkpCakLwoHwSrF
Vitamins: https://www.youtube.com/playlist?list=PLITxL6KOIm-Yh6oM0TL9xYk5rFdvGTEbS
Bone and cartilage: https://www.youtube.com/watch?v=ptONU83WurM&list=PLITxL6KOIm-Zw1L8MVWoK2MXirqYy96Fx
Carbohydrate metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-aWswjKFANjFUOwTpGm_INo
Iodine and thyroid hormones: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZnfrllfWhw5ImiSlko3DVR
Acid-base balance: https://www.youtube.com/playlist?list=PLITxL6KOIm-Zc5kBLwUylhl9-fSoCzF6h
Inborn errors of protein metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-aV_wvoJbLQWqdDp5TSoWLS
Ketone body metabolism: https://www.youtube.com/playlist?list=PLITxL6KOIm-ZzQroxjwykI4mGMUlwf1VK
Vitamin D: https://www.youtube.com/playlist?list=PLITxL6KOIm-aED2-s-bl8TmNV_9QAlV0u

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