Question 1

Which layer of the skin is primarily responsible for the diffusion of oxygen and nutrients to the epidermis, and what type of tissue is it composed of?

Accepted Answer

Dermis; composed of loose and dense irregular collagenous connective tissue

Question 2

A patient presents with a bluish tint to their skin and mucous membranes. Which pigment is most likely responsible for this appearance, and what does it indicate?

Accepted Answer

Hemoglobin; indicates lack of oxygen (cyanosis)

Question 3

Which of the following best describes the negative feedback loop for body temperature regulation when exposed to a hot environment?

Accepted Answer

Thermoreceptors detect increased temperature, hypothalamus stimulates sweating and vasodilation, temperature returns to normal, feedback reduces sweating and vasodilation.

Question 4

Which layer of the epidermis is only found in thick skin, such as the palms and soles, and what is its primary function?

Accepted Answer

Stratum lucidum; provides extra protection against abrasion

Question 5

A patient suffers a burn that results in blisters and affects both the epidermis and part of the dermis. According to burn classification, what type of burn is this?

Accepted Answer

Second-degree burn

Question 6

Which cell type in the epidermis is responsible for producing melanin, and what is the primary function of melanin?

Accepted Answer

Melanocytes; protects against UV radiation

Question 7

A patient is diagnosed with malignant melanoma. Which cell type is affected, and why is this cancer considered the most dangerous type of skin cancer?

Accepted Answer

Melanocytes; it is most likely to metastasize

Question 8

Which of the following bones is classified as a sesamoid bone, and what is its function?

Accepted Answer

Patella; increases leverage of the quadriceps tendon

Question 9

During bone repair, which sequence of events occurs first?

Accepted Answer

Hematoma formation

Question 10

Which hormone increases blood calcium levels by stimulating osteoclast activity, and what is the negative feedback mechanism involved?

Accepted Answer

Parathyroid hormone; released when blood calcium is low, stimulates osteoclasts to break down bone and release calcium

Question 11

A patient has a fracture where the skin and tissues around the fracture are damaged. What type of fracture is this?

Accepted Answer

Compound fracture

Question 12

Which bone of the cranium is considered the 'keystone' bone because it articulates with every other cranial bone?

Accepted Answer

Sphenoid bone

Question 13

Which structure in the dermis detects pressure and vibration stimuli and resembles the layers in a sliced onion?

Accepted Answer

Lamellated (Pacinian) corpuscle

Question 14

Which type of ossification forms most flat bones such as those of the skull, and what is the first structure to ossify?

Accepted Answer

Intramembranous ossification; middle layer of spongy bone

Question 15

Which of the following best describes the function of osteoclasts?

Accepted Answer

Break down bone and are responsible for bone resorption

Question 16

A patient is experiencing excessive stretching force on a bone. Which term best describes this force, and what is its effect on bone?

Accepted Answer

Compression; stimulates bone deposition

Question 17

Which layer of the epidermis is the thickest and is found only in thick skin?

Accepted Answer

Stratum spinosum

Question 18

Which of the following is the correct order of the layers of the epidermis from deep to superficial in thick skin?

Accepted Answer

Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum

Question 19

Which pigment is found in carrots and sweet potatoes and provides protection from UV radiation?

Accepted Answer

Carotene

Question 20

A patient presents with a wound that disrupts the skin's integrity but does not damage underlying tissues. What is the most likely classification of this wound?

Accepted Answer

Superficial wound

Chapters 5, 6, and 7: Integumentary and Skeletal Systems – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards