Which of the following is a natural pain reliever?

A) Acetylcholine
B) Dopamine
C) Endorphins
D) Substance P
E) Epinephrine


Answer: C) Endorphins

Biology & Microbiology

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Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.01 M and the concentration of lactate is 0.002 M, the pH is 2.9

A. 3.9 B. 3.6 C. 3.2 D. 2.5 E. 2.2

Biology & Microbiology

The letter “B” above represents

a. uterus. b. ovary. c. vagina. d. urinary bladder. e. pelvic girdle.

Biology & Microbiology

Long time back in history the Babylonians believed that earth was flat. Later based on scientific observations and evidence, it was found that earth was round in shape. What does that tell you about scientific knowledge?

A. Scientific knowledge is uncertain B. Scientific knowledge is mutable C. Scientific knowledge is durable D. none of the above

Biology & Microbiology

When a tourist buys a sand dollar at a beach shop, what are they buying?

A. Anendoskeleton of calcium carbonate ossicles B. A calcium carbonate shell secreted from the mantle C. An endoskeleton made of cartilage D. An endoskeleton made of bone E. A molted exoskeleton made of chitin

Biology & Microbiology