Question 1

Which of the following best describes the hierarchical levels of organization in the human body, from smallest to largest?

Accepted Answer

Atom → Molecule → Cell → Tissue → Organ → Organ System → Organism

Question 2

A patient is experiencing high blood pressure. Which of the following best describes the negative feedback mechanism that would help restore homeostasis?

Accepted Answer

Baroreceptors detect increased blood pressure, the brain signals blood vessels to dilate and heart rate to decrease, lowering blood pressure.

Question 3

Which of the following is NOT one of the four primary tissue types found in the human body?

Accepted Answer

Adipose

Question 4

Which organ system is primarily responsible for transporting nutrients, gases, and wastes throughout the body?

Accepted Answer

Circulatory system

Question 5

During childbirth, stretch receptors in the uterus trigger the release of oxytocin, which intensifies uterine contractions. This is an example of:

Accepted Answer

Positive feedback

Question 6

Which of the following equations correctly represents the formation of a water molecule from its constituent atoms?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 7

Which of the following statements about atoms and molecules is correct?

Accepted Answer

Molecules can be composed of the same kind of atoms or different kinds of atoms.

Question 8

A scientist observes a group of cells working together to secrete mucus in the respiratory tract. These cells most likely form which type of tissue?

Accepted Answer

Epithelial tissue

Question 9

Which of the following is a correct example of a compound molecule?

Accepted Answer

KCl (potassium chloride)

Question 10

If a person’s body temperature rises above normal, which component of the homeostatic control system first detects this change?

Accepted Answer

Receptor

Question 11

Which of the following best describes the function of the control center in a homeostatic feedback loop?

Accepted Answer

It determines the next action based on information received from the receptor.

Question 12

Which organ system is primarily responsible for removing metabolic waste from the body?

Accepted Answer

Excretory (urinary) system

Question 13

Which of the following is a correct sequence of events in a negative feedback loop regulating blood pressure?

Accepted Answer

Baroreceptors detect change → Brain processes information → Blood vessels dilate → Blood pressure decreases

Question 14

Which of the following is NOT one of the 11 commonly recognized organ systems in the human body?

Accepted Answer

Sensory system

Question 15

Which type of feedback loop is most commonly used for conditions that require frequent adjustment to maintain homeostasis?

Accepted Answer

Negative feedback

Question 16

Which of the following best explains why carbon, despite being the 'stuff of life,' is less abundant in the universe compared to hydrogen and helium?

Accepted Answer

Carbon atoms are formed in stars and are less abundant than hydrogen and helium, which were produced in the Big Bang.

Question 17

Which of the following best describes the role of the effector in a homeostatic feedback loop?

Accepted Answer

It receives directions from the control center and produces a response to restore the controlled condition.

Question 18

Which of the following is an example of a macromolecule essential for life?

Accepted Answer

DNA

Question 19

A group of similar cells working together to perform a specific function is called a:

Accepted Answer

Tissue

Question 20

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

Accepted Answer

Prokaryotic cells lack a nucleus, while eukaryotic cells have a nucleus.

Introduction to Anatomy & Physiology: Levels of Organization, Body Systems, and Homeostatic Feedback

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