$$78\% \text{ nitrogen} + 21\% \text{ oxygen}$$

Question 1

Which of the following best describes the process of homeostasis in the human body?

Accepted Answer

The body maintains a stable internal environment by responding to external stimuli and adjusting physiological processes.

Question 2

A patient is experiencing muscle cramps due to an imbalance of electrolytes. Which inorganic compound is most likely involved in this scenario?

Accepted Answer

Salt

Question 3

Which organelle is primarily responsible for producing ATP, the energy currency of the cell?

Accepted Answer

Mitochondrion

Question 4

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

Accepted Answer

It will shrivel and die as water leaves the cell.

Question 5

Which of the following is NOT a function of proteins in the cell?

Accepted Answer

Storing genetic information

Question 6

Which equation correctly represents the composition of air in terms of oxygen and nitrogen percentages?

Accepted Answer

$$78\% 	ext{ nitrogen} + 21\% 	ext{ oxygen}$$

Question 7

Which of the following best explains why lipids are important for cell membrane structure?

Accepted Answer

Lipids are hydrophobic and help create a barrier that separates the cell from its environment.

Question 8

A scientist observes that a cell lacks a nucleus and membrane-bound organelles. What type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 9

Which of the following is the correct order of organization from simplest to most complex?

Accepted Answer

Atom, cell, tissue, organ, organ system, organism

Question 10

Which of the following best describes passive transport across the plasma membrane?

Accepted Answer

Movement of molecules from high to low concentration without energy input

Question 11

A cell is actively transporting sodium ions out of the cell against their concentration gradient. Which process is being used?

Accepted Answer

Active transport

Question 12

Which of the following best explains the role of ATP in cellular processes?

Accepted Answer

ATP provides energy for biological processes such as muscle contraction and active transport.

Question 13

Which of the following is a correct statement about isotonic solutions?

Accepted Answer

The amount of salt and water is balanced, so the cell maintains its size.

Question 14

Which organelle is responsible for packaging and shipping proteins to their next destination?

Accepted Answer

Golgi apparatus

Question 15

Which of the following best describes the difference between molecules and compounds?

Accepted Answer

Molecules are made up of two or more atoms, and compounds are made up of two or more different elements.

Question 16

Which of the following is a function of carbohydrates in the body?

Accepted Answer

Short-term energy storage

Question 17

Which of the following best describes the role of the control center in homeostasis?

Accepted Answer

It receives information from receptors and signals a response to effectors.

Question 18

Which of the following best explains why oxygen is important for human life?

Accepted Answer

Oxygen is needed for chemical reactions that produce ATP in mitochondria.

Question 19

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have both.

Question 20

A cell is observed to have a large central vacuole, a cell wall, and chloroplasts. What type of cell is this most likely to be?

Accepted Answer

Plant cell

Introduction to Anatomy & Physiology: Organization, Chemistry, and the Cell

Study Guide - Practice Questions