Which statement about steroids is TRUE? Cytochrome P450 monooxygenase introduces oxygen atoms into calcitriol. Cytochrome c oxidase requires cholesterol for full activity. All classes of steroid hormones have a different number of carbon atoms. Cholesterol is excreted from the organism only in the form of bile salts.
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- Which of the following statements about the ketone bodies is/are TRUE? Produced during starvation and in diabetic patients Excess is transformed to acetone or hydroxybutyrate. Extreme amount of ketone bodies may cause ketosis in diabetics. Occurs during a high-lipid and low-protein diet.Which of the following is true about vitamin D3 (cholecalciferol)? A. It is a sterol. B. It is a hormone precursor. C. Humans enzymatically synthesize their own Vitamin D3. D. It is converted into a biologically active form by UV light from sunlight.Metabolic ketoacidosis is a common problem with diabetics, which is caused by which of the following? Excessive oxidation of fatty acids, leading to an accumulation of ketone bodies in the blood. Excessive oxidation of glucose, leading to an accumulation of ketone bodies in the blood. Excessive oxidation of proteins, leading to an accumulation of ammonia in the blood. Hyperglycemia.
- Which of the following about eicosanoids is incorrect? A. Cyclooxygenase pathway produces prostaglandins from arachidonic acid. B. Lipoxygenases metabolize arachidonic acid to thromboxane. C. Lipoxygenase pathway produces leukotrienes. D. Phospholipase A2 catalyzes the liberation of arachidonic acid from phospholipidsWhich of the following is true?a. Triglycerides have the least energy content per gram of the three majorenergy sources in the body.b. Fat catabolism generates new triglycerides for storage in adipose tissue.c. By mass, the total-body content of carbohydrates exceeds that of total triglycerides.d. Catabolism of fatty acids occurs in two-carbon steps.e. Triglycerides are the major lipids found in plasma membranesWhich of the following is TRUE? The substrate for lipase is fatty acids When lipase is present and active it hydrolyzes triglycerides When triglycerides are hydrolyzed the pH would be elevated All of the above None of the above
- Which of the following statements is true for the use of ketone bodies? Brain cells cannot use ketone bodies as energy Ketone bodies can cause ketoacidosis Cardiac muscles cannot use ketone bodies as energy Increasing carbohydrate in take will lead to production of ketone bodiesOut of the following, cholesterol does not serve as a precursor for which compounds?a) Vitamin Db) Sex hormonesc) Bile saltsd) Bile pigmentsIn your own understanding, what do you think is/are the reason why most of the clinical features of these diseases involve muscle and nerve tissue? Diseases: Fumarase Deficiency, Alpha-Ketoglutarate Dehydrogenase Deficiency, and Succinate Dehydrogenase Deficiency.
- Its principal function is to increase the concentration of glucose in the blood by speeding the glycogenolysis and gluconeogenesis in the liver.Which one of the following is found on cells that line the capillary wall of blood vessels adjacent to adipose tissue or muscle tissue that promotes release of fatty acids (FAs) from dietary triacylglycerols (TAGs) via hydrolysis? Chylomicrons Serum Albumin Bile Salts (Bile Acids) Prostaglandins Lipoprotein LipaseWhich of the following is least likely to contribute to reduced fat oxidation at high intensities? Group of answer choices pick one only Inhibited lipolysis Increased lactic acid production. Inhibited FA transport into the muscle. Inhibited FA transport into the mitochondria