Chapter 1: The Study of Life

Pancreatic tumours may cause excess secretion of glucagon. Type I diabetes results from the failure of the pancreas to produce insulin. Which of the following statement about these two conditions is true?

a. A pancreatic tumour and type I diabetes will have the opposite effects on blood sugar levels.

b. A pancreatic tumour and type I diabetes will both cause hyperglycemia.

c. A pancreatic tumour and type I diabetes will both cause hypoglycemia.

d. Both pancreatic tumours and type I diabetes result in the inability of cells to take up glucose.

Figure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estradiol are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol

Which of the following statements about the nephron is false?

a. The collecting duct empties into the distal convoluted tubule.

b. The Bowman’s capsule surrounds the glomerulus.

c. The loop of Henle is between the proximal and distal

convoluted tubules.

d. The loop of Henle empties into the distal convoluted

tubule.

Which of the following statements about the anatomy of a mollusk is false?

a. Mollusks have a radula for grinding food.

b. A digestive gland is connected to the stomach.

c. The tissue beneath the shell is called the mantle.

d. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.

Do you think Dolly was a Finn-Dorset or a Scottish Blackface sheep?

Autoantibodies are probably involved in:

a. reactions to poison ivy

b. pollen allergies

c. systemic lupus erythematosus

d. HIV/AIDS

Select two items that biologists agree are necessary in order to consider an organism “alive.” For each, give an example of a nonliving object that otherwise fits the definition of “alive.”

Recent studies suggest that blue light exposure can impact human circadian rhythms. This suggests that blue light disrupts the function of the _____ gland(s).

a. adrenal

b. pituitary

c. pineal

d. thyroid

________ medications are often used to treat patients with ADHD.

a. Tranquilizer

b. Antibiotic

c. Stimulant

d. Anti-seizure

How does the polygastric digestive system aid in digesting roughage?