Question 1

Which of the following best describes the principle of homeostasis in the human body?

Accepted Answer

The maintenance of a stable internal environment despite external changes.

Question 2

A patient is experiencing a rapid increase in blood clotting after a vessel injury. Which type of feedback loop is this an example of?

Accepted Answer

Positive feedback loop

Question 3

Which of the following correctly lists the six levels of structural organization in the human body from simplest to most complex?

Accepted Answer

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

Question 4

A histologist is examining a tissue sample and notes the presence of tightly packed cells with little extracellular matrix, specialized for secretion and absorption. Which tissue type is most likely being observed?

Accepted Answer

Epithelial tissue

Question 5

Which of the following best describes the function of the arrector pili muscle?

Accepted Answer

It contracts to cause hair to stand upright, producing 'goosebumps'.

Question 6

A person is exposed to cold temperatures, and their body responds by shivering to generate heat. Which component of the homeostatic control system is responsible for initiating the shivering response?

Accepted Answer

Effector

Question 7

Which of the following is the correct anatomical position?

Accepted Answer

Standing upright, facing forward, arms at sides with palms facing forward

Question 8

Which of the following statements about the hypodermis is correct?

Accepted Answer

It is primarily composed of adipose tissue and functions as insulation and energy storage.

Question 9

A burn patient presents with damage to the epidermis and the entire dermis, but reports no pain at the site of injury. Which degree of burn is this, and why is it not initially painful?

Accepted Answer

Third-degree burn; nerve endings are destroyed.

Question 10

Which of the following best explains why vitamin D synthesis is important for the integumentary system?

Accepted Answer

It is necessary for calcium absorption in the intestines, which is vital for bone health.

Question 11

Which of the following is a correct example of a negative feedback loop in the human body?

Accepted Answer

Regulation of blood glucose levels by insulin and glucagon

Question 12

A tissue sample contains cells embedded in a matrix with collagen and elastic fibers, and is found in the dermis of the skin. Which type of connective tissue is this?

Accepted Answer

Dense irregular connective tissue

Question 13

Which of the following best describes the function of melanocytes in the epidermis?

Accepted Answer

They produce melanin, which protects underlying cells from UV radiation.

Question 14

A cross-section through the body that divides it into anterior and posterior parts is called a:

Accepted Answer

Coronal (frontal) plane

Question 15

Which of the following is the main function of the serous membranes in the body?

Accepted Answer

To reduce friction between moving organs

Question 16

A neuron receives electrical signals at its ______ and sends them away from the cell body via its ______.

Accepted Answer

dendrites; axon

Question 17

Which of the following best explains the difference between thick and thin skin?

Accepted Answer

Thick skin has a thicker stratum corneum and contains no hair follicles.

Question 18

Which of the following equations correctly represents the relationship between surface area ($$A$$), volume ($$V$$), and the rate of diffusion ($$R) in a $$cell, assuming $$R is $$directly proportional to $$A$$ and inversely proportional to $$V$$?

Accepted Answer

$$R = k \frac{A}{V}$$

Question 19

A patient presents with yellowing of the skin and sclera. Which pigment is most likely responsible for this condition, and what is the underlying physiological cause?

Accepted Answer

Bilirubin; liver dysfunction leading to jaundice

Question 20

Which of the following best describes the function of sebaceous glands?

Accepted Answer

They secrete sebum to lubricate and waterproof the skin and hair.

Anatomy & Physiology: Intro, Histology, and Integumentary System Study Guide

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