Question 1

Which of the following best describes the concept of homeostasis in human physiology?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

A patient is experiencing a rapid drop in blood glucose levels after skipping a meal. Which feedback mechanism is most likely to be activated to restore homeostasis?

Accepted Answer

Negative feedback, where glucagon is released to increase blood glucose.

Question 3

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

Accepted Answer

The release of oxytocin during childbirth to intensify uterine contractions.

Question 4

A student is asked to explain the relationship between anatomy and physiology. Which of the following responses is most accurate?

Accepted Answer

Anatomy is the study of body structure, while physiology is the study of body function.

Question 5

Which of the following best illustrates the principle of complementarity of structure and function?

Accepted Answer

The thin walls of alveoli in the lungs allow for efficient gas exchange.

Question 6

A person is exposed to a cold environment. Which physiological response is most likely to occur to maintain homeostasis?

Accepted Answer

Vasoconstriction of blood vessels in the skin to reduce heat loss.

Question 7

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

Accepted Answer

Chemical, cellular, tissue, organ, organ system, organism

Question 8

A patient presents with symptoms of dehydration. Which organ system is primarily responsible for regulating water balance in the body?

Accepted Answer

Urinary system

Question 9

Which of the following scenarios best demonstrates the use of feedback loops in maintaining homeostasis?

Accepted Answer

An increase in blood CO$$_2$$ levels stimulates increased breathing rate to expel CO$$_2.$$

Question 10

Which of the following best describes the function of the nervous system in maintaining homeostasis?

Accepted Answer

It detects changes in the internal and external environment and coordinates appropriate responses.

Question 11

A patient with a damaged hypothalamus is likely to have difficulty with which of the following?

Accepted Answer

Regulating body temperature

Question 12

Which of the following is an example of an anatomical term used to describe a body region?

Accepted Answer

Brachial

Question 13

A researcher is studying the effect of a new drug on heart rate. Which level of organization is primarily being investigated?

Accepted Answer

Organ

Question 14

Which of the following statements about anatomical position is correct?

Accepted Answer

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

Question 15

A person is experiencing difficulty maintaining blood pH within the normal range. Which organ systems are most directly involved in this regulation?

Accepted Answer

Respiratory and urinary systems

Question 16

Which of the following best explains why the study of anatomy and physiology is important for understanding human health?

Accepted Answer

It provides the foundation for recognizing normal and abnormal body functions.

Question 17

A patient is unable to sweat due to a genetic disorder. Which homeostatic process is most likely to be impaired?

Accepted Answer

Thermoregulation

Question 18

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

Accepted Answer

They carry out the response to restore homeostasis.

Question 19

A person is running a marathon and begins to sweat profusely. Which type of feedback is responsible for this response, and what is the main goal?

Accepted Answer

Negative feedback; to lower body temperature

Question 20

Which of the following equations best represents the relationship between variables in a negative feedback loop?

Accepted Answer

$$\Delta S = S_{set} - S_{actual}$$

Question 21

A patient with chronic kidney disease is unable to excrete excess hydrogen ions. What is the likely consequence for blood pH, and which system is failing?

Accepted Answer

Blood pH will decrease (acidosis); the urinary system is failing.

BIO212: Anatomy and Physiology I – Syllabus and Study Guide Overview

Study Guide - Practice Questions

Study Guide - Flashcards