Download 2402 Self quiz Ch 25

Anatomy & Physiology II
Self Quiz Ch 25
Pro: Manhal Chbat, MD
1. The most frequently used “energy currency” molecule of the cell is
A) cGMP
B) cAMP
C) GTP
D) ATP
E) ADP
2. What is the fate of a food molecule absorbed by the gastrointestinal tract?
A) It may be used as an energy source.
B) It may be used to build another molecule.
C) It may be stored for future use.
D) A and B are correct.
E) A, B and C are correct.
3. Which of the following reactions is NOT part of the oxidation of glucose to produce
ATP?
A) β oxidation
B) glycolysis
C) formation of acetyl coenzyme A
D) Kreb's cycle reactions
E) electron transport chain reactions
4. Glycolysis
A) occurs when phosphofructokinase activity level is low.
B) occurs in the mitochondria.
C) results in the net gain of 2 ATP molecules.
D) converts two pyruvic acid molecules into one glucose molecule.
E) All of these are correct.
5. The electron transport chain
A) is embedded in the cell's plasma membrane.
B) links ATP production to the pumping of NAD+ ions in a process called
chemidiffusion
C) uses only cytochromes as electron carriers.
D) ultimately transfers electrons to oxygen atoms.
E) All of these are correct.
6. During cellular respiration of just one glucose molecule,
A) chemiosmosis generates most of the ATP produced.
B) six CO2, six H2O and 36 or 38 ATP molecules are reactants
C) six O2 molecules and 36 or 38 ADP molecules are products.
D) A and B are correct.
E) A, B and C are correct.
7. How is excess glucose stored in liver and muscle cells?
A) as glucose-6-phosphate
B) as cellulose
C) as glycogen
D) as starch
E) as dextrin
8. When glucose levels are low, glucagon and cortisol can stimulate production of
glucose from noncarbohydrate sources by a process called
A) glycolysis
B) gluconeogenesis
C) glycogenolysis
D) glycogenesis
E) B and D are correct.
9. Which of the following is NOT true of cholesterol?
A) Most cholesterol is made by the liver, but it is also present in some foods.
B) As blood cholesterol levels increase, the risk of heart and coronary artery disease
decrease.
C) Cholesterol is necessary for most human cell membranes.
D) Cholesterol is necessary for synthesis of steroid hormones and bile.
E) Exercise, diet and medications can affect blood cholesterol levels.
10. Triglycerides
A) consist of 3 glycerol molecules joined to one fatty acid molecule.
B) stored in adipose tissue are the major energy reserves of the body.
C) are more difficult to store than glycogen.
D) are seldom removed from adipocytes once stored.
E) are synthesized in a process called β oxidation.
11. Lipogenesis
A) can convert excess glucose and amino acids into fatty acids.
B) is stimulated by thyroid hormones.
C) occurs when individuals use more calories than they consume.
D) A and B are correct.
E) A, B and C are correct.
12. Which role does protein serve in the body?
A) biological catalysts: enzymes
B) defense against disease: antibodies, complement
C) structural support: collagen, elastin, keratin
D) transporters: membrane proteins, globulins, hemoglobin
E) All of these are correct.
13. Where does protein anabolism occur?
A) in the mitochondria
B) on the ribosomes
C) in the endoplasmic reticulum
D) in the Golgi body
E) in the lysosome
14. Complete proteins
A) contain all of the essential amino acids.
B) contain insufficient quantities of all of the essential amino acids.
C) are found in leafy green vegetables, legumes (beans and peas), and grains.
D) A and B are correct.
E) A, B and C are correct.
15. Under which conditions is basal metabolic rate measured?
A) fasting
B) awake but resting
C) comfortable environment
D) A and B are correct.
E) A, B and C are correct.
16. Which of part of the brain regulates body temperature, appetite and thirst?
A) pons
B) cerebral cortex
C) cerebellum
D) hypothalmus
E) medulla oblongata
17. Which mineral (ion) is correctly matched to it functions in the body?
A) Na+: essential component of thyroid hormones
B) K+: needed for normal insulin activity
C) Fe: component of hemoglobin and of cytochromes
D) I-: nerve and muscle impulse conduction; osmotic pressure
E) Cr: nerve and muscle impulse conduction
18. Which of the following is the most abundant mineral in the body?
A) Na
B) Ca2+
C) K+
D) Mg2+
E) Fe2+
19. Which of the following is a fat-soluble vitamin necessary for vision and for healthy
skin?
A) niacin
B) folic acid
C) vitamin A
D) vitamin D
E) vitamin E
20. Which of the following is a water-soluble vitamin necessary for DNA synthesis,
normal blood cell production and the prevention of neural tube defects?
A) vitamin K
B) folic acid
C) vitamin B12
D) vitamin A
E) riboflavin