Question 1

Which of the following best describes a negative feedback mechanism in the human body?

Accepted Answer

A process where the response reduces or shuts off the original stimulus, returning the variable to its set point.

Question 2

A patient’s blood glucose rises after a meal. Insulin is released, causing glucose uptake by cells and lowering blood glucose. This is an example of:

Accepted Answer

Negative feedback

Question 3

Which of the following is an example of a positive feedback mechanism?

Accepted Answer

Enhancement of labor contractions by oxytocin

Question 4

If a patient has a hernia in the abdominal region, which statement is most accurate?

Accepted Answer

An organ is protruding from its designated cavity.

Question 5

Which directional term describes the position of the nose relative to the chin?

Accepted Answer

Superior

Question 6

A midsagittal section of the body would divide the body into:

Accepted Answer

Equal right and left halves

Question 7

Which of the following best describes the difference between a compound and a mixture?

Accepted Answer

Compounds are always homogeneous, mixtures can be heterogeneous or homogeneous.

Question 8

Which of the following is true regarding the atomic structure of oxygen-18 ($$^{18}O$$)?

Accepted Answer

It has 8 protons, 8 electrons, and 10 neutrons.

Question 9

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom and an electronegative atom of another molecule.

Question 10

Which of the following is a correct example of an exchange (displacement) reaction?

Accepted Answer

$$AB + CD \rightarrow AD + CB$$

Question 11

Which of the following statements about energy in the human body is correct?

Accepted Answer

Kinetic energy is energy in action.

Question 12

Which of the following is a property of a colloid?

Accepted Answer

Solute particles are larger than in a solution and scatter light but do not settle out.

Question 13

Which of the following best describes the role of enzymes in chemical reactions?

Accepted Answer

Enzymes increase the rate of reaction without being chemically changed.

Question 14

A solution contains 180.12 grams of glucose ($$C_6H_{12}O_6$) dissolved in enough water to make 1 liter. What is the molarity (M) of this solution?

Accepted Answer

$$1\ M$$

Question 15

Which of the following is true about the dorsal body cavity?

Accepted Answer

It protects the nervous system.

Question 16

Which of the following best describes the octet rule?

Accepted Answer

Atoms are stable with 8 electrons in their outermost shell.

Question 17

Which of the following is a correct statement about serous membranes?

Accepted Answer

The visceral layer covers the organs, and the parietal layer lines the cavity walls.

Question 18

Which of the following is a property of an ionic bond?

Accepted Answer

It results from the attraction between oppositely charged ions.

Question 19

Which of the following best describes an exergonic reaction?

Accepted Answer

A reaction that releases energy and has products with less potential energy than reactants.

Question 20

Which of the following is true about radioisotopes used in medicine?

Accepted Answer

They can be used for diagnosis and treatment but may also cause tissue damage.

Body Organization, Homeostasis, Basic Chemistry, and Terminology: Study Notes for Anatomy & Physiology

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