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Science-Related Homework Help Health, Nutrition, and Food Sciences Topic started by: ScarletSky on Mar 4, 2018



Title: Describe the body's mechanism for regulating water excretion.
Post by: ScarletSky on Mar 4, 2018
Describe the body's mechanism for regulating water excretion.

Q. 2

Which supplement preparations should be avoided?
 a. those containing taurine
 b. those claiming to be low-potency
 c. those claiming to be organic or natural preparations with added substances
  d. those claiming to be tried and true and tested by generations of moms
 e. those containing a balance of vitamins and minerals

Q. 3

When selecting a vitamin-mineral supplement, choose one in which the nutrient levels are _____.
 a. at or very close to the RDA
 b. all the same
 c. at least 200 percent of the RDA
  d. at least 300 percent of the RDA
  e. at least 500 percent of the RDA

Q. 4

Supplement users are more likely to have excessive intake of _____.
 a. the B vitamins
 b. iron, zinc, vitamin A, and folate
 c. vitamins A, D, E, and K
 d. calcium, iron, vitamin C, and thiamin
  e. selenium, chromium, and magnesium

Q. 5

In which circumstance should nutrient supplements in amounts consistent with the RDA be taken?
 a. when energy intake is high
 b. when more than one gallon of water is consumed per day
  c. when an illness improves your appetite
 d. when a vegan diet is followed
 e. when food is obtained primarily at grocery-stores

Q. 6

The best way to ensure an adequate intake of trace minerals is to _____.
 a. eat foods containing the major minerals
 b. make sure your diet is sufficient in vitamins
  c. consume a variety of foods
 d. practice dietary adequacy
 e. take supplements

Q. 7

A diabetes-like condition may develop when _____ is lacking in the diet.
 a. iron
 b. zinc
 c. chromium
 d. molybdenum
  e. copper

Q. 8

Fluoride seems to be helpful in preventing _____.
 a. cancer
 b. diabetes
 c. dental decay
  d. heart disease
  e. goiter


Title: Describe the body's mechanism for regulating water excretion.
Post by: huhuhuhua on Mar 4, 2018
Answer to #1

Water excretion is regulated by the brain and the kidneys. The cells of the brain's hypothalamus, which monitor blood salts, stimulate the pituitary gland to release antidiuretic hormone (ADH) whenever the salts are too concentrated, or the blood volume or blood pressure is too low. ADH stimulates the kidneys to reabsorb water rather than excrete it. Thus, the more water you need, the less you excrete. If too much water is lost from the body, blood volume and blood pressure fall. Cells in the kidneys respond to the low blood pressure by releasing renin. Through a complex series of events involving the hormone aldosterone, this enzyme also causes the kidneys to retain more water. Again, the effect is that, when more water is needed, less is excreted.

Answer to #2

c

Answer to #3

a

Answer to #4

b

Answer to #5

d

Answer to #6

c

Answer to #7

c

Answer to #8

c


Title: Describe the body's mechanism for regulating water excretion.
Post by: ScarletSky on Mar 4, 2018
Extremely helpful


Title: Describe the body's mechanism for regulating water excretion.
Post by: huhuhuhua on Mar 4, 2018
Cool, thanks for the positive feedback