Pharmaceutical Biochemistry: Lipids Lecture Quiz

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What is the main function of lipoproteins in the cell?

Aid in lowering blood cholesterol

Act as precursors for steroid hormones (correct)

Serve as potential antibiotics

Serve as a source of fat-soluble vitamins

How do polyunsaturated fatty acids affect blood cholesterol levels?

Convert blood cholesterol into lipids

Have no effect on blood cholesterol

Lower blood cholesterol (correct)

Increase blood cholesterol

Which vitamin dissolution is assisted by lipids due to their fat-soluble nature?

Vitamin B12

Vitamin C

Vitamin D (correct)

Vitamin B6

How does the water solubility of lipids change with increasing carbon chain length?

Solubility decreases Signup and view all the answers

What happens to the melting point of fatty acids as unsaturation increases?

Melting point decreases Signup and view all the answers

How can fatty acids be classified based on carbon chain length?

Medium-chain fatty acids (C12 and C14) Signup and view all the answers

What is the main function of the cell membrane?

Separating the cell's interior from the external environment Signup and view all the answers

Which molecules are likely to undergo passive diffusion across biological membranes?

Unionized, nonpolar, and lipophilic molecules Signup and view all the answers

What characterizes the lipid bilayer structure in cell membranes?

Two-layered with nonpolar tails in the middle Signup and view all the answers

Which process involves the drug binding with an intrinsic factor carrier?

Facilitated diffusion Signup and view all the answers

What type of kinetics is associated with passive diffusion of drugs across membranes?

First order kinetics Signup and view all the answers

Which molecules are examples of those likely to cross membranes via passive diffusion?

$O_2$ and $CO_2$ Signup and view all the answers

What is the main function of androgens in promoting muscle growth?

Building up muscle strength and enhancing endurance Signup and view all the answers

Which of the following is a possible effect of high androgen levels in women?

Infertility Signup and view all the answers

What is a common side effect that may occur with anabolic steroid use?

Increased risk of bacterial infections Signup and view all the answers

Which hormone is a precursor in the synthesis of estrogen?

Androstenedione Signup and view all the answers

What is a possible effect of high androgen levels related to PCOS in women?

Infertility Signup and view all the answers

Which is a potential virilizing effect of high androgen levels?

Excess facial or body hair and deeper voice in women Signup and view all the answers

Which process expends energy for the transportation of molecules?

Active transport Signup and view all the answers

Which type of process involves engulfing drug particles by the cell?

Facilitated diffusion Signup and view all the answers

Which type of drugs are usually transported through carrier-mediated active transport?

Drugs with structures similar to food Signup and view all the answers

Which type of ions can be transported through carrier-mediated active transport?

Sodium, potassium, and chloride ions Signup and view all the answers

What is a characteristic of endocytosis?

Involves engulfing drug particles by the cell Signup and view all the answers

What is a feature of saturable processes in drug transport?

They exhibit zero order kinetics Signup and view all the answers

What is the main function of bile acids in the digestive tract?

Emulsify fats Signup and view all the answers

How are bile acids synthesized?

By contracting the liver due to parasympathetic stimulation of the vagus nerves Signup and view all the answers