Question 1

Which organ system is primarily responsible for defending the body against infections and returning leaked fluid to the bloodstream?

Accepted Answer

Lymphatic/immune system

Question 2

A patient presents with a blood pH of 7.1. Which of the following best describes their condition?

Accepted Answer

Acidosis

Question 3

Which directional term describes a structure that is farther from the point of attachment to the body?

Accepted Answer

Distal

Question 4

Which feedback mechanism is most commonly used by the body to maintain homeostasis, and what is its main purpose?

Accepted Answer

Negative feedback; reverses the change to bring the body back to normal

Question 5

Which of the following is NOT a function of the skeletal system?

Accepted Answer

Produces heat for temperature regulation

Question 6

A person is standing in the anatomical position. Which plane divides the body into left and right halves?

Accepted Answer

Median/midsagittal plane

Question 7

Which of the following best describes the role of the control center in a homeostatic feedback mechanism?

Accepted Answer

Receives input from the receptor and determines the correct response

Question 8

If a person’s blood calcium level drops below the normal range, which type of feedback mechanism will most likely be activated, and what will be the result?

Accepted Answer

Negative feedback; calcium levels will be restored to normal

Question 9

Which organ system is responsible for producing hormones that regulate growth, metabolism, and reproduction?

Accepted Answer

Endocrine system

Question 10

A patient has damage to the left lumbar region. Which organ is most likely affected?

Accepted Answer

Descending colon

Question 11

Which of the following is a property of acids?

Accepted Answer

They release hydrogen ions ($$\mathrm{H}^+) $$into solutions

Question 12

Which survival need is most directly required for cellular respiration to release energy ($$\mathrm{ATP}) $$from food?

Accepted Answer

Oxygen

Question 13

A person is experiencing rapid breathing and excessive sweating after running a marathon. Which two life functions are most directly involved in this response?

Accepted Answer

Responsiveness and metabolism

Question 14

Which region of the abdomen contains the bladder and reproductive organs?

Accepted Answer

Hypogastric (pubic) region

Question 15

Which of the following best describes the relationship between cells, tissues, organs, and organ systems?

Accepted Answer

Cells form tissues, tissues form organs, organs form organ systems

Question 16

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

Accepted Answer

Oxytocin release during childbirth to intensify contractions

Question 17

Which organ system is responsible for removing carbon dioxide from the body and supplying oxygen to the blood?

Accepted Answer

Respiratory system

Question 18

A solution has a pH of 9. Which of the following best describes its properties?

Accepted Answer

Basic/alkaline, with fewer $$\mathrm{H}^+$$ ions

Question 19

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

Accepted Answer

Enables body movement

Question 20

Which directional term describes a structure that is closer to the midline of the body?

Accepted Answer

Medial

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

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