Question 1

Which of the following best describes a negative feedback loop in human physiology?

Accepted Answer

A process that counteracts a change to maintain homeostasis, such as lowering body temperature when it rises.

Question 2

A patient with untreated Type 1 diabetes is found to have a blood pH of 7.20. Which physiological mechanism is most likely being activated to compensate for this acid-base imbalance?

Accepted Answer

Increased respiratory rate to blow off H$$^+$$ ions and raise pH (Kussmaul respirations).

Question 3

Which equation correctly represents the relationship between hydrogen ion concentration and pH?

Accepted Answer

$$\mathrm{pH} = -\log_{10}[\mathrm{H}^+]$$

Question 4

Which of the following is an example of facilitated diffusion?

Accepted Answer

Insulin enabling glucose to enter cells from the bloodstream.

Question 5

Which of the following best describes catabolism?

Accepted Answer

The breakdown of compounds and cells to release energy.

Question 6

A solution has a pH of 2. Which of the following statements is correct?

Accepted Answer

The solution has a high concentration of H$$^+$$ ions.

Question 7

Which transport mechanism requires energy in the form of ATP?

Accepted Answer

Active transport

Question 8

Which of the following is the most common type of tissue in the human body?

Accepted Answer

Connective tissue

Question 9

Which of the following best describes the primary function of the cell membrane?

Accepted Answer

To regulate the movement of substances into and out of the cell.

Question 10

Which of the following is a polysaccharide?

Accepted Answer

Glycogen

Question 11

Which of the following bonds is formed by the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Question 12

Which abdominal quadrant contains the liver and gallbladder?

Accepted Answer

Right upper quadrant

Question 13

Which of the following is true regarding the pH compatibility with life?

Accepted Answer

Life is compatible with pH values between 6.9 and 7.9.

Question 14

Which of the following best explains why water follows sodium during osmosis?

Accepted Answer

Water moves from areas of low solute concentration to high solute concentration to achieve equilibrium.

Question 15

Which of the following is a real-world example of positive feedback?

Accepted Answer

Uterine contractions during childbirth stimulated by oxytocin.

Question 16

Which of the following is the correct sequence for the levels of organization in the human body, from simplest to most complex?

Accepted Answer

Cell, tissue, organ, organ system, organism

Question 17

Which of the following best describes the difference between diffusion and facilitated diffusion?

Accepted Answer

Facilitated diffusion requires a carrier protein, while diffusion does not.

Question 18

A patient is experiencing muscle contraction. Which property of muscle tissue is being demonstrated?

Accepted Answer

Contractility

Question 19

Which of the following is a function of the epithelium?

Accepted Answer

Protection and absorption

Question 20

Which of the following best explains how lipid solubility affects medication absorption?

Accepted Answer

Lipid-soluble medications are absorbed more easily through cell membranes because the membrane is composed of a phospholipid bilayer.

Core Concepts in Anatomy & Physiology: Homeostasis, Transport, pH, and Tissue Types

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