Question 1

Which phase of the cell cycle is primarily responsible for DNA replication, and what is the key event that occurs during this phase?

Accepted Answer

S phase; DNA replication occurs

Question 2

A patient presents with an enlarged heart due to increased workload. Which cellular process best explains this change, and what is the underlying mechanism?

Accepted Answer

Hypertrophy; increased cell size without cell division

Question 3

During mitosis, chromosomes align at the center of the cell. Which phase is this, and what is the significance of this alignment?

Accepted Answer

Metaphase; ensures equal chromosome distribution to daughter cells

Question 4

Which of the following best distinguishes apoptosis from necrosis?

Accepted Answer

Apoptosis is a regulated process that prevents inflammation, while necrosis often triggers inflammation

Question 5

Which structural characteristic is unique to epithelial tissue compared to other tissue types?

Accepted Answer

Cells are tightly packed with little extracellular space

Question 6

Which type of epithelium is best suited for absorption and is found lining the small intestine?

Accepted Answer

Simple columnar epithelium

Question 7

A gland that releases its product directly into the bloodstream is classified as which type?

Accepted Answer

Endocrine gland

Question 8

Which structural element is common to all connective tissues and is responsible for providing tensile strength?

Accepted Answer

Collagen fibers

Question 9

A patient with severe burns loses the protective barrier of the skin. Which layer is primarily affected, and what is its main function?

Accepted Answer

Epidermis; acts as a barrier against pathogens and dehydration

Question 10

Which tissue type composes the epidermis, and what is its primary function?

Accepted Answer

Stratified squamous epithelium; protection against abrasion

Question 11

Which layer of the epidermis is responsible for the production of keratin and is found only in thick skin?

Accepted Answer

Stratum lucidum

Question 12

Which factor contributes most to the variation in human skin color?

Accepted Answer

Melanin produced by melanocytes

Question 13

The arrector pili muscle is attached to the hair follicle. What is its function during cold exposure?

Accepted Answer

It contracts, causing the hair to stand upright and producing 'goosebumps'

Question 14

Which region of the hair contains actively dividing cells responsible for hair growth?

Accepted Answer

Hair bulb

Question 15

Which structure is NOT part of a nail?

Accepted Answer

Nail cortex

Question 16

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

Accepted Answer

Eccrine glands are distributed throughout the body and regulate temperature, while apocrine glands are found in specific areas and are activated by stress

Question 17

A patient is diagnosed with atrophy of skeletal muscle after prolonged immobilization. Which equation best represents the relationship between muscle mass and activity level?

Accepted Answer

Muscle mass $$= 	ext{Initial mass} 	imes \left(1 - \frac{	ext{Inactivity duration}}{100}ight)$$

Question 18

Which connective tissue type is most abundant in the dermis and provides strength and flexibility?

Accepted Answer

Dense irregular connective tissue

Question 19

A multicellular exocrine gland is classified as 'compound tubular.' What does this mean structurally?

Accepted Answer

It has branched ducts with tubular secretory units

Question 20

Which of the following is NOT a function of the skin?

Accepted Answer

Production of red blood cells

Guided Study for BI-013 Exam 04: Cells, Tissues, and Integumentary System

Study Guide - Practice Questions

Study Guide - Flashcards