Question 1

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

Accepted Answer

Production of red blood cells

Question 2

A patient presents with a burn that has destroyed the entire epidermis but left the dermis intact. Which layer is most likely to be affected, and what is a key characteristic of this layer?

Accepted Answer

Stratum basale; contains melanocytes and is responsible for cell division

Question 3

Which equation best represents the diffusion of nutrients and oxygen from the dermis to the avascular epidermis?

Accepted Answer

Fick's Law: $$J = -D \frac{dC}{dx}$$

Question 4

Which of the following best describes the difference between eccrine and apocrine sweat glands?

Accepted Answer

Eccrine glands are smaller, widely distributed, and function in thermoregulation; apocrine glands are larger, found in axillary and anogenital areas, and activate at puberty

Question 5

A biopsy of skin tissue reveals dense irregular connective tissue with numerous blood vessels and sensory receptors. Which layer is most likely being examined?

Accepted Answer

Reticular layer of the dermis

Question 6

Which of the following structures is responsible for sensing deep pressure in the skin?

Accepted Answer

Lamellar (Pacinian) corpuscle

Question 7

Which factor is most directly responsible for the variation in human skin color?

Accepted Answer

Amount and type of melanin produced by melanocytes

Question 8

Which of the following best describes the structure and function of the cutaneous membrane?

Accepted Answer

Keratinized stratified squamous epithelium attached to connective tissue; functions as a dry, protective barrier

Question 9

A histological slide shows simple squamous epithelium on a thin layer of areolar connective tissue, forming two layers around an organ. Which membrane is being observed, and what is its primary function?

Accepted Answer

Serous membrane; reduces friction between organs and cavity walls by secreting serous fluid

Question 10

Which of the following equations would best describe the rate of water loss through the skin, assuming the skin acts as a semi-permeable membrane?

Accepted Answer

Rate = $$J = -P \Delta C$$

Question 11

Which of the following best explains why the epidermis is avascular?

Accepted Answer

The keratinized stratified squamous epithelium lacks blood vessels and relies on diffusion from the dermis for nutrients and oxygen

Question 12

Which of the following is TRUE regarding mucous membranes?

Accepted Answer

They line body cavities that open to the outside and are kept moist by secretions

Question 13

A patient with inflammation of the pericardium is likely to experience which of the following symptoms, based on the function of serous membranes?

Accepted Answer

Painful friction due to decreased serous fluid production

Question 14

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

Accepted Answer

Contracts to cause hair to stand upright, aiding in thermoregulation and emotional response

Question 15

Which of the following tissue types is most likely to be found lining the alveoli of the lungs, and why?

Accepted Answer

Simple squamous epithelium; allows for efficient gas exchange due to its thinness

Question 16

Which of the following best describes the relationship between the visceral and parietal layers of serous membranes?

Accepted Answer

The visceral layer covers the organ, while the parietal layer lines the cavity around the organ

Question 17

Which of the following is a characteristic unique to thick skin found on the palms and soles?

Accepted Answer

Presence of the stratum lucidum and absence of hair and oil glands

Question 18

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

Accepted Answer

Secrete oil (sebum) to lubricate and waterproof the skin and hair

Question 19

Which of the following best explains why the hypodermis is not considered a layer of the skin?

Accepted Answer

It is primarily composed of adipose tissue and lies deep to the skin, serving as a subcutaneous layer

The Integumentary System and Body Membranes: Study Guide

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