Question 1

Which of the following best describes the function of tight junctions in epithelial tissue?

Accepted Answer

They prevent material from passing between cells by forming a partial fusion of specific proteins on the lateral surface of the cell membrane.

Question 2

A tissue sample from the lining of the stomach shows a single layer of tall, column-shaped cells. Which type of epithelial tissue is this most likely to be?

Accepted Answer

Simple columnar epithelium

Question 3

Which equation correctly represents the calculation of total surface area ($$A) of a $$simple cuboidal epithelial cell, assuming each cell is a cube with side length $$l$$?

Accepted Answer

$$A = 6l^2$

Question 4

Which connective tissue type is characterized by loosely arranged collagen and elastic fibers, is highly vascular, and found in the lamina propria?

Accepted Answer

Loose connective tissue

Question 5

A patient has a mutation affecting the proteins that form desmosomes. Which symptom would most likely result from this mutation?

Accepted Answer

Reduced ability of epithelial cells to resist mechanical stress, leading to blistering of the skin

Question 6

Which of the following is NOT a function of epithelial tissue?

Accepted Answer

Support and protection of neurons

Question 7

Which type of glandular epithelium secretes its products directly into the blood rather than onto a body surface or into a cavity?

Accepted Answer

Endocrine gland

Question 8

Which connective tissue cell type is responsible for breaking down the matrix in bone tissue?

Accepted Answer

Osteoclast

Question 9

A sample of tissue is found to be avascular, covers body surfaces, and has little extracellular space. Which tissue type is this?

Accepted Answer

Epithelial tissue

Question 10

Which of the following best describes the function of gap junctions in cardiac muscle tissue?

Accepted Answer

They allow synchronization of contractions by permitting ions to flow between adjacent cells.

Question 11

Which type of cartilage is most abundant and found in the trachea, ribs, and ends of long bones?

Accepted Answer

Hyaline cartilage

Question 12

Which of the following equations correctly represents the calculation of the volume ($$V) of a $$blood sample containing $$n$$ red blood cells, each with an average volume $$v_{cell}$$?

Accepted Answer

$$V = n 	imes v_{cell}$$

Question 13

Which muscle tissue subtype is striated and under voluntary control?

Accepted Answer

Skeletal muscle

Question 14

Which of the following is a characteristic of dense regular connective tissue?

Accepted Answer

Fibers running in the same direction, found in tendons and ligaments

Question 15

Which cell type in nervous tissue is responsible for conducting electrical impulses?

Accepted Answer

Neuron

Question 16

A biopsy reveals stratified squamous epithelium. Which function is this tissue most likely performing?

Accepted Answer

Protection against abrasion

Question 17

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

Accepted Answer

Cartilage is avascular, so nutrients and repair cells must diffuse from surrounding tissues.

Question 18

Which of the following is a function of the ground substance in connective tissue?

Accepted Answer

Surrounds cells and fibers, containing water, ions, proteins, and carbohydrates

Question 19

Which of the following best describes pseudostratified epithelium?

Accepted Answer

All cells appear stratified, but some cells are shorter and nuclei appear at different levels

Question 20

Which of the following equations correctly represents the calculation of the total number of fibers ($$N) in a $$connective tissue sample, given the fiber density $$d ($$fibers per mm$$^3) $$and the sample volume $$V (in mm$^3$$)?

Accepted Answer

$$N = d 	imes V$$

Introduction to Tissues: Histology, Cell Junctions, and Major Tissue Types

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