Sources of Glucose during Starvation The typical human adult uses about $160 \mathrm{~g}$ of glucose per day, $120 \mathrm{~g}$ of which is used by the brain. The available reserve of glucose ( $\sim 20$ g of circulating glucose and $\sim 190 \mathrm{~g}$ of glycogen) is adequate for about one day. After the reserve has been depleted during starvation, how would the body obtain more glucose?

Metabolic Differences between Muscle and Liver in a "Fight-or-Flight" Situation When an animal confronts a "fight-or-flight" situation, the release of epinephrine promotes glycogen breakdown in the liver, heart, and skeletal muscle. The end product of glycogen breakdown in the liver is glucose; the end product in skeletal muscle is pyruvate.
(a) What is the reason for the different products of glycogen breakdown in the two tissues?
(b) What is the advantage to an animal that must fight or flee these specific glycogen breakdown routes?

Water-Soluble versus Lipid-Soluble Hormones On the basis of their physical properties, hormones fall into one of two categories: those that are very soluble in water but relatively insoluble in lipids (e.g., epinephrine) and those that are relatively insoluble in water but highly soluble in lipids (e.g., steroid hormones). In their role as regulators of cellular activity, most water-soluble hormones do not enter their target cells. The lipid-soluble hormones, by contrast, do enter their target cells and ultimately act in the nucleus. What are the correlation between solubility, the location of receptors, and the mode of action of these two classes of hormones?

Peptide Hormone Activity Explain how two peptide hormones as structurally similar as oxytocin and vasopressin can have such different effects.

Write an equivalent ratio for the ratio 6 to 8 .

Golden rectangles are rectangles for which the ratio of the width w to the length l is equal to the ratio of l to l + w. The ratio of the length to the width for these rectangles is called the golden ratio. Find the value of the golden ratio using a rectangle with a width of 1 unit.

If the reserve requirement were 15% percent, the value of the monetary multiplier would be

A. 5.50
B. 8.54
C. 7.32
D. 6.67

Identify: Robert La Follette, Alice Paul, Hepburn Act, Upton Sinclair, Payne-Aldrich Tariff, Federal Reserve Act, Federal Trade Commission.

a. If two cubes have sides in the ratio 2:5, what is the ratio of their volumes?
b. If two similar cones have heights in the ratio a:b, what is the ratio of their volumes?

Why are banks able to keep only 10 percent of checking deposits on reserve and still be reasonably sure that they will be able to pay all checks presented for payment?

The Federal Helium Reserve held about $16$ billion cubic feet of helium in $2010$ and is being depleted by about $2.1$ billion cubic feet each year.

a. Give a linear equation for the remaining federal helium reserves, R, in terms of t, the number of years since $2010$ .

b. In $2015$, what will the helium reserves be?

c. If the rate of depletion doesn't change, in what year will the Federal Helium Reserve be depleted?

Match the air volumes in column A with the definitions in column B. Place the letter of your choice in the space provided. A
Column A
a. Expiratory reserve volume
b. Functional residual capacity forced expiration
c. Inspiratory capacity
d. Inspiratory reserve volume
e. Residual volume
f. Tidal volume
g. Total lung capacity forced inspiration
h. Vital capacity\

Column B
_____ Volume in addition to tidal volume that leaves the lungs during

Explain the importance of each term or name: Federal Trade Commission (FTC); Federal Reserve System; Nineteenth Amendment; Clayton Antitrust Act; Carrie Chapman Catt

Write an equivalent ratio for the ratio 12/21.