Question 1

Which of the following best describes the main function of the plasma membrane in a typical animal cell?

Accepted Answer

It regulates the movement of substances into and out of the cell, maintaining homeostasis.

Question 2

A patient is experiencing muscle cramps due to an electrolyte imbalance. Which of the following ions is most likely involved in this scenario?

Accepted Answer

Potassium ($$K^+)$$

Question 3

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

It has a partial positive charge on hydrogen atoms and a partial negative charge on the oxygen atom.

Question 4

A scientist is studying the effect of a new drug on blood pH. If the drug causes the blood pH to drop from 7.4 to 6.4, how does the hydrogen ion concentration change?

Accepted Answer

It increases by a factor of 10.

Question 5

Which of the following is an example of a negative feedback loop in the human body?

Accepted Answer

Regulation of blood glucose by insulin.

Question 6

Which of the following best describes the difference between organic and inorganic compounds?

Accepted Answer

Organic compounds contain carbon-hydrogen bonds, while inorganic compounds generally do not.

Question 7

A cell is placed in a hypotonic solution. What will most likely happen to the cell?

Accepted Answer

It will swell and possibly burst due to water influx.

Question 8

Which of the following best describes the process of facilitated diffusion?

Accepted Answer

Movement of molecules from high to low concentration through a protein channel without energy input.

Question 9

Which of the following is a correct statement about the hydrolysis of ATP?

Accepted Answer

ATP hydrolysis results in the formation of ADP, inorganic phosphate, and releases energy.

Question 10

A patient has a genetic disorder that affects the structure of collagen in connective tissue. Which of the following tissue types is most likely to be directly affected?

Accepted Answer

Connective tissue

Question 11

Which of the following best describes the role of buffers in body fluids?

Accepted Answer

Buffers prevent drastic changes in pH by absorbing or releasing hydrogen ions.

Question 12

Which of the following is a function of the integumentary system?

Accepted Answer

Regulation of body temperature

Question 13

A person with a burn that affects both the epidermis and the entire dermis, but not the underlying tissue, has what type of burn?

Accepted Answer

Third-degree burn

Question 14

Which of the following best explains why an extreme change in pH is undesirable in body fluids?

Accepted Answer

It can denature proteins and disrupt cellular functions.

Question 15

Which of the following best describes the difference between dehydration synthesis and hydrolysis?

Accepted Answer

Dehydration synthesis removes water to form bonds, while hydrolysis adds water to break bonds.

Question 16

A patient is diagnosed with osteoporosis. Which of the following best explains the underlying cause of this condition?

Accepted Answer

Increased bone resorption relative to bone formation

Question 17

Which of the following is a correct statement about the anatomical position?

Accepted Answer

The body is standing upright, facing forward, with arms at the sides and palms facing forward.

Question 18

Which of the following best describes the function of mitochondria in eukaryotic cells?

Accepted Answer

Production of ATP through cellular respiration

Question 19

A person is unable to sweat due to a genetic disorder. Which function of the integumentary system is most directly impaired?

Accepted Answer

Regulation of body temperature

Question 20

Which of the following best describes the role of calcium ions ($$Ca^{2+}) in $$muscle contraction?

Accepted Answer

They bind to troponin, exposing binding sites on actin for myosin.

Anatomy & Physiology: Foundational Concepts and Systems Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard