26 Questions
What is the main purpose of the urea cycle?
To remove excess nitrogen from the body
Which of the following is NOT a major mechanism of heat loss from the body?
Condensation
What is the primary function of ketone bodies in the absence of glucose?
To provide energy for the brain
What is the main difference between the absorptive and postabsorptive states?
The absorptive state is characterized by high insulin levels, while the postabsorptive state is characterized by low insulin levels.
Which macronutrient requires the most energy to break down?
Proteins
What is the primary function of catabolism?
Breaking down large molecules into smaller ones
Which of the following is NOT a catabolic hormone?
Insulin
What is the primary function of lipogenesis?
To convert excess acetyl CoA into storage forms of energy
What is the main purpose of the hypothalamus in thermoregulation?
Both a and b
What percentage of energy released from catabolism is transferred to ATP?
40%
Which type of heat loss accounts for the largest percentage of total heat loss from the body?
Radiation
What is the primary source of energy for cells when we need more energy than what we eat?
Stored glycogen or fat
What is the relationship between calorie intake, calorie expenditure, and weight gain/loss?
Eating 10% more calories than used each day leads to overweight, while eating 20% more leads to obesity.
What is the primary function of anabolism?
Using energy from catabolic reactions to build small molecules into large molecules
What is the main function of vitamins in the body?
To facilitate biochemical reactions
What is the primary storage form of carbohydrates in the body?
Glycogen
What is the final electron receptor in aerobic respiration?
Oxygen
Which hormone is responsible for cells taking up glucose from the circulatory system?
Insulin
What is the primary function of glycolysis?
Production of ATP
What process converts pyruvate to lactic acid in the absence of oxygen?
Anaerobic respiration
Which enzyme converts pyruvate into acetyl CoA in the mitochondria?
Pyruvate dehydrogenase
During lipid metabolism, what stimulates the release of pancreatic lipase and bile salts?
Cholecystokinin
What is the primary function of the Krebs cycle in cellular respiration?
Generate ATP molecules
Which molecule yields more energy compared to carbohydrates and proteins?
Fatty acids
What is the primary outcome of ketogenesis?
Creation of ketone bodies
What is the main purpose of the Cori cycle?
Convert lactic acid to glucose in muscle cells
Test your knowledge on metabolism, catabolism, and energy storage processes in the body. Learn about the roles of catabolic hormones like cortisol, glucagon, and epinephrine in regulating body functions.
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