Question 1

Which of the following best describes the main function of a negative feedback system in human physiology?

Accepted Answer

It opposes or counteracts a change to restore the body to normal conditions.

Question 2

A patient is exposed to cold temperatures, causing their body temperature to drop below 36.7°C. Which of the following is the correct sequence of events in the negative feedback pathway to restore homeostasis?

Accepted Answer

Stimulus → Receptor → Afferent Pathway → Control Center → Efferent Pathway → Effector → Response

Question 3

Which of the following is an example of a positive feedback system in the human body?

Accepted Answer

Blood clotting after a vessel injury

Question 4

Which anatomical term describes a patient lying face up in the anatomical position?

Accepted Answer

Supine position

Question 5

The thoracic cavity is separated from the abdominopelvic cavity by which structure?

Accepted Answer

Diaphragm

Question 6

Which of the following best illustrates the concept that structure is directly related to function?

Accepted Answer

The right lung has three lobes to maximize gas exchange.

Question 7

Which serous membrane lines the internal body wall of the abdominopelvic cavity?

Accepted Answer

Parietal peritoneum

Question 8

A patient has a tumor in the mediastinum. Which of the following structures could be affected?

Accepted Answer

Heart

Question 9

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

Accepted Answer

Chemical → Cellular → Tissue → Organ → Organ System → Organism

Question 10

Which of the following best describes the function of serous fluid secreted by serous membranes?

Accepted Answer

It reduces friction between organs and cavity walls.

Question 11

A patient is experiencing increased sweating and dilation of blood vessels in the skin. According to the negative feedback model for thermoregulation, what is the most likely stimulus?

Accepted Answer

Body temperature above 37.2°C

Question 12

Which of the following is NOT a characteristic of life shared by all living organisms?

Accepted Answer

Ability to photosynthesize

Question 13

Which body cavity contains the brain and is surrounded by the bones of the cranium?

Accepted Answer

Cranial cavity

Question 14

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

Accepted Answer

It carries out the response to restore homeostasis.

Question 15

During blood clotting, which step demonstrates the positive feedback loop?

Accepted Answer

Platelets release chemicals that attract more platelets to the injury site.

Question 16

Which directional term would be used to describe the location of the heart relative to the lungs?

Accepted Answer

Medial

Question 17

A patient is described as having pain in the right lower quadrant of the abdominopelvic cavity. Which organ is most likely involved?

Accepted Answer

Appendix

Question 18

Which of the following best explains why failure to maintain homeostasis can result in disease or death?

Accepted Answer

Physiological systems cannot restore balance, leading to malfunction of organs and tissues.

Question 19

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

Accepted Answer

The body is standing upright, facing forward, with feet together and palms facing forward.

Question 20

Which of the following best describes the function of the mediastinum?

Accepted Answer

It contains the heart, thymus, trachea, and major blood vessels.

Introduction to Anatomy & Physiology: Organization, Homeostasis, and Anatomical Terminology

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