Question : 41.Why milk used as a first-aid remedy for someone who : 1357143

41.Why is milk used as a first-aid remedy for someone who has swallowed a heavy-metal poison?

a.The poison acts on the protein in the milk rather than on the protein of the gastrointestinal tract.

b.Milk will cause the person to vomit and expel the poison.

c.Milk will provide calcium, which serves to render the poison harmless.

d.a and b

e.b and c

42.Is it a good idea to avoid acidic foods like tomatoes and orange juice in order to prevent acid stomach?

a.yes, because highly acidic foods increase the acidity of the stomach

b.no, because no food is acidic enough to make the stomach acid stronger

c.no, because the stomach is supposed to be acidic to do its job

d.a and b

e.b and c

43.Tim, who lost a large amount of weight during an illness, is thinking about taking amino acid supplements to help him regain muscle mass. What advice would you give him?

a.Amino acid supplements are an excellent way to quickly provide energy to muscles for rebuilding.

b.Taking amino acid supplements helps keep the digestive system from overworking while you recover from illness.

c.Extra carbohydrate, but never extra protein, is needed for recovery.

d.Whole protein is better handled by the digestive system and will better promote recovery.

44.When comparing the digestion and absorption of proteins with fats it is important to know that:

a.proteins are broken down into individual amino acids and absorbed by all intestinal cells at an equal rate.

b.larger peptide molecules must be completely broken down into amino acids to be absorbed into the bloodstream from the intestine.

c.cells in the small intestine preferentially absorb different types of amino acids, which causes competition by amino acids at the absorption sites.

d.amino acids need a carrier in the bloodstream because they do not transport very well alone.

45.The process of protein turnover involves:

a.the conversion of protein to glucose for energy in half of the protein we eat.

b.the loss of amino acids by excretion through the kidneys when cells die.

c.the use of amino acids that have been conserved from breakdown of old cells.

d.the annual replacement of old cells with new protein that has entered the body in food.

46.The roles of enzymes formed by body proteins are important when foods are eaten because:

a.each enzyme is responsible for numerous different chemical reactions.

b.an enzyme acts as a catalyst to speed up a reaction without being altered itself.

c.enzymes signal certain organs to respond to a change in conditions in the body.

d.some enzymes can become chemical messengers in the nervous system.

47.A child suffering from protein deficiency develops edema. This is an example of protein’s role in:

a.supporting growth and maintenance.

b.building enzymes and hormones.

c.maintaining fluid and electrolyte balance.

d.maintaining acid-base balance.

48.Certain proteins act as buffers in the blood. In this role they are responsible for:

a.providing immunity from foreign substances that invade the body.

b.making sure that sodium is transported outside the cells.

c.ensuring that too much fluid in the cells doesn’t cause edema.

d.picking up and releasing hydrogens in the blood to balance its pH.

49.Proteins use the process of active transport to move substances in or out of the cell by:

a.opening passages in the membrane and escorting substances into the cell.

b.attaching to minerals to carry them throughout the bloodstream.

c.decreasing the water content in cells to get rid of excess acid or base levels.

d.sending antibodies to cells to carry excess proteins out to where they are needed.

50.An athlete consumes large amounts of meat in an effort to build extra muscle tissue. This practice does not work because:

a.the body has no place to store extra amino acids.

b.the body will dismantle its tissue proteins in this situation.

c.the body converts amino acid residues to fuel or stores them as fat.

d.a and b

e.a and c