Question 1

Which type of feedback mechanism is illustrated in the first image, where a break in a blood vessel wall leads to the formation of a platelet plug?

Accepted Answer

Positive feedback, because the response enhances the original stimulus.

Question 2

In the second image, which body cavity is correctly described as being protected by bone and housing the central nervous system?

Accepted Answer

Dorsal body cavity

Question 3

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

Accepted Answer

It determines the set point and analyzes input to coordinate an appropriate response.

Question 4

A patient is experiencing a rapid drop in blood calcium levels. Which organ system is primarily responsible for correcting this imbalance?

Accepted Answer

Skeletal system

Question 5

Which directional term best describes the position of the heart relative to the spine?

Accepted Answer

Question 6

Which of the following is an example of a negative feedback mechanism?

Accepted Answer

Regulation of blood glucose by insulin

Question 7

Which plane divides the body into superior and inferior parts?

Accepted Answer

Transverse (horizontal) plane

Question 8

Which of the following elements is most abundant in the human body and is a component of all organic molecules?

Accepted Answer

Oxygen

Question 9

A midsagittal section of the body would pass through which of the following structures?

Accepted Answer

Urinary bladder

Question 10

Which of the following best describes the Law of Mass Balance as it applies to the human body?

Accepted Answer

The amount of a substance taken in must equal the amount lost.

Question 11

Which of the following is NOT a necessary life function?

Accepted Answer

Homeostasis

Question 12

Which organ system is responsible for eliminating nitrogenous wastes and regulating water, electrolyte, and acid-base balance?

Accepted Answer

Urinary system

Question 13

Which of the following best describes the anatomical position?

Accepted Answer

Body erect, feet slightly apart, palms facing forward

Question 14

Which of the following is a function of the integumentary system?

Accepted Answer

Synthesizes vitamin D

Question 15

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

Accepted Answer

Gross anatomy studies large, visible structures; microscopic anatomy studies structures too small to be seen by the naked eye.

Question 16

Which of the following is an example of a trace element in the human body?

Accepted Answer

Iodine

Question 17

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

Accepted Answer

Provides the means to respond to the stimulus

Question 18

Which of the following is a correct pairing of a body cavity and the organ it contains?

Accepted Answer

Thoracic cavity – lungs

Question 19

Which of the following best describes the function of ATP in the body?

Accepted Answer

Stores energy in its chemical bonds for cellular work

Question 20

Which of the following is a correct description of the anatomical term 'proximal'?

Accepted Answer

Closer to the origin of a body part

Introduction to Anatomy & Physiology: Foundations, Organization, and Chemistry

Study Guide - Practice Questions