Question 1

Which of the following best defines homeostasis in the context of human anatomy and 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 rapid breathing and sweating after running a marathon. Which homeostatic mechanism is primarily responsible for returning the body to equilibrium?

Accepted Answer

Negative feedback loop

Question 3

Which of the following is NOT a function of the plasma membrane in a composite cell?

Accepted Answer

Synthesizing proteins for export

Question 4

A person with a broken femur is at risk for which of the following complications due to the bone's structure and function?

Accepted Answer

Impaired blood cell production due to damage to the spongy bone

Question 5

Which equation best represents the relationship between cardiac output, heart rate, and stroke volume?

Accepted Answer

$$CO = HR 	imes SV$$

Question 6

A patient is diagnosed with osteoporosis. Which of the following best explains the physiological basis of this condition?

Accepted Answer

Decreased bone density due to an imbalance between osteoclast and osteoblast activity

Question 7

Which of the following best describes the function of the epiphyseal plate in bone growth?

Accepted Answer

It is the site where new bone is produced, allowing for longitudinal growth during childhood and adolescence.

Question 8

A patient presents with symptoms of Addison's disease, which affects the adrenal glands. Which hormone is most likely deficient in this patient?

Accepted Answer

Cortisol

Question 9

Which of the following best explains why the nervous system can respond to stimuli more rapidly than the endocrine system?

Accepted Answer

Nerve impulses travel quickly along neurons, while hormones travel more slowly through the bloodstream.

Question 10

Which of the following is a correct sequence of events in the negative feedback regulation of blood glucose after a meal?

Accepted Answer

Blood glucose rises $$\rightarrow$$ pancreas releases insulin $$\rightarrow$$ cells take up glucose $$\rightarrow$$ blood glucose returns to normal

Question 11

Which of the following best describes the anatomical difference between compact bone and spongy bone?

Accepted Answer

Compact bone is dense and forms the outer layer of bones, while spongy bone is porous and found at the ends of long bones.

Question 12

A patient with a parathyroid tumor is experiencing hypercalcemia. Which hormone is likely being overproduced?

Accepted Answer

Parathyroid hormone (PTH)

Question 13

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

Accepted Answer

Cell $$\rightarrow$$ Tissue $$\rightarrow$$ Organ $$\rightarrow$$ Organ system

Question 14

Which of the following best describes the function of mitochondria in a composite cell?

Accepted Answer

They produce ATP through cellular respiration.

Question 15

A patient is unable to produce sufficient insulin. Which organ system is primarily affected?

Accepted Answer

Endocrine system

Question 16

Which of the following best explains why the skin is considered an organ?

Accepted Answer

It is composed of multiple tissue types that work together to perform specific functions.

Question 17

A patient is experiencing muscle weakness and fatigue. Laboratory tests reveal low levels of calcium in the blood. Which hormone is most likely deficient?

Accepted Answer

Parathyroid hormone (PTH)

Question 18

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

Accepted Answer

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

Question 19

A patient is found to have a tumor in the adrenal medulla. Which hormone is most likely to be overproduced?

Accepted Answer

Adrenaline (epinephrine)

Question 20

Which of the following best explains the significance of the phospholipid bilayer in the plasma membrane?

Accepted Answer

It creates a selectively permeable barrier that regulates the movement of substances into and out of the cell.

Intro to Anatomy & Physiology (ANAT 113) – Course Syllabus and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards