Question 1

Which of the following best describes the principle of complementarity of structure and function in anatomy and physiology?

Accepted Answer

The form of a body part is such that it best suits its function, and structure and function are interdependent at all levels of organization.

Question 2

A patient is experiencing a rapid drop in blood pressure. Which type of feedback loop is most likely to be activated to restore homeostasis, and what is the general mechanism?

Accepted Answer

Negative feedback loop; opposes the change by increasing blood pressure back toward the set point.

Question 3

Which of the following is NOT one of the eight characteristics of life shared by all living things?

Accepted Answer

Ability to photosynthesize

Question 4

During childbirth, the hormone oxytocin stimulates uterine contractions, which in turn cause more oxytocin to be released. This is an example of:

Accepted Answer

Positive feedback loop

Question 5

Which of the following best illustrates a concentration gradient in the human body?

Accepted Answer

Oxygen diffusing from the alveoli into the blood because there is more oxygen in the alveoli than in the blood.

Question 6

Which level of organization is directly above the tissue level in the hierarchy of the human body?

Accepted Answer

Organ level

Question 7

A scientist is studying the structure of the stomach wall and how its different tissue types interact. Which branch of anatomy is she most likely practicing?

Accepted Answer

Histology

Question 8

Which of the following is an example of cell-cell communication that is essential for multicellular organisms?

Accepted Answer

A neuron releasing neurotransmitters to stimulate a muscle cell to contract.

Question 9

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

Accepted Answer

Effectors receive signals from the control center and produce a response that opposes the initial stimulus.

Question 10

A person is exposed to a cold environment, causing their body temperature to drop. Which of the following best describes the sequence of events in the negative feedback loop that restores normal body temperature?

Accepted Answer

Receptors detect the drop, the control center signals effectors, and effectors generate heat to raise body temperature.

Question 11

Which of the following is an example of a pressure gradient in the human body?

Accepted Answer

Blood flowing from arteries (high pressure) to veins (low pressure).

Question 12

Which organ system is primarily responsible for removing metabolic waste products from the blood and regulating water balance?

Accepted Answer

Urinary system

Question 13

Which of the following best explains why homeostatic imbalances can lead to disease?

Accepted Answer

Homeostatic imbalances disrupt the stable internal environment required for normal physiological processes.

Question 14

Which of the following is an example of autocrine signaling?

Accepted Answer

A cell releases a cytokine that binds to receptors on its own surface, triggering a response.

Question 15

Which of the following best describes the difference between gross (macroscopic) anatomy and microscopic anatomy?

Accepted Answer

Gross anatomy studies structures visible to the naked eye, while microscopic anatomy studies structures requiring magnification.

Question 16

A researcher is investigating how the heart pumps blood and how blood pressure is regulated. Which branch of physiology is she most likely studying?

Accepted Answer

Organ physiology

Question 17

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

Accepted Answer

Chemical level → Cellular level → Tissue level → Organ level → Organ system level → Organismal level

Question 18

Which of the following best describes the function of the mesentery, a newly recognized organ system?

Accepted Answer

It connects the intestine to the abdominal wall, allowing blood vessels, lymphatics, and nerves to supply the intestines.

Question 19

Which of the following is an example of a regulated variable in homeostasis?

Accepted Answer

Blood glucose concentration

Question 20

A patient has a genetic mutation that prevents their cells from producing certain chemical messengers. Which of the following is a likely consequence?

Accepted Answer

Impaired cell-cell communication, leading to uncoordinated body functions and possible homeostatic imbalance.

Lecture 1: Core Principles of Anatomy & Physiology

Study Guide - Practice Questions

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