Question 1

Which of the following best describes the main function of simple squamous epithelium, and where is it most commonly found?

Accepted Answer

Diffusion and filtration; lining the alveoli of the lungs

Question 2

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

Accepted Answer

Bilirubin; liver dysfunction leading to jaundice

Question 3

Which of the following is a key difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands lack ducts and release hormones into the blood; exocrine glands have ducts and release secretions onto body surfaces or into cavities.

Question 4

Which connective tissue fiber provides high tensile strength and is the most abundant in the human body?

Accepted Answer

Collagen fibers

Question 5

A burn patient is diagnosed with a third-degree burn. Which of the following best describes the characteristics and treatment priorities for this type of burn?

Accepted Answer

Entire thickness of skin is destroyed; treatment focuses on fluid replacement, infection prevention, and possible skin grafting.

Question 6

Which of the following equations best represents the negative feedback loop involved in calcium homeostasis regulated by parathyroid hormone (PTH)?

Accepted Answer

$$\Delta [Ca$$^{2+}$$] = PTH_{secretion} - Calcitonin_{secretion}$$

Question 7

Which of the following best describes the main function of the stratum basale in the epidermis?

Accepted Answer

Serves as the site of active mitosis, producing new keratinocytes

Question 8

A biopsy reveals a tissue with abundant ground substance, scattered fibroblasts, and loosely arranged collagen and elastic fibers. Which tissue is this most likely to be?

Accepted Answer

Areolar connective tissue

Question 9

Which of the following is NOT a function of bone?

Accepted Answer

Synthesis of vitamin D

Question 10

A long bone is fractured. Which sequence best describes the order of events in bone repair?

Accepted Answer

Hematoma formation → Fibrocartilaginous callus formation → Bony callus formation → Bone remodeling

Question 11

Which of the following best explains why cartilage heals more slowly than bone after injury?

Accepted Answer

Cartilage is avascular, so nutrients and cells required for repair are delivered slowly

Question 12

Which of the following is a characteristic unique to transitional epithelium, and where is it found?

Accepted Answer

Ability to stretch and recoil; lining the urinary bladder

Question 13

Which of the following cell types is responsible for bone resorption during bone remodeling?

Accepted Answer

Osteoclasts

Question 14

A patient has a mutation that prevents the production of keratin. Which layer of the skin would be most directly affected, and what would be the likely consequence?

Accepted Answer

Stratum corneum; increased susceptibility to dehydration and infection

Question 15

Which of the following best describes the difference between loose and dense connective tissue?

Accepted Answer

Dense connective tissue has more closely packed fibers, providing greater tensile strength.

Question 16

Which of the following is a function of eccrine sweat glands?

Accepted Answer

Thermoregulation through evaporative cooling

Question 17

Which of the following best describes the composition of the ground substance in connective tissue?

Accepted Answer

A gel-like material composed of interstitial fluid, proteoglycans, and cell adhesion proteins

Question 18

Which of the following is a correct pairing of a connective tissue cell type and its function?

Accepted Answer

Fibroblast – produces collagen fibers

Question 19

Which of the following best describes the function of the periosteum?

Accepted Answer

Covers the external surface of bone, contains osteoblasts, and serves as an attachment point for tendons and ligaments

Question 20

A patient is diagnosed with osteoporosis, a disease characterized by decreased bone mass. Which of the following best explains the pathophysiology of this condition?

Accepted Answer

Increased bone resorption by osteoclasts outpacing bone deposition by osteoblasts

Anatomy & Physiology I: Study Guide for Tissues, Integumentary System, and Skeletal System

Guida di studio - Domande di pratica

Study guide - Flashcard