BIO 168 - Tissues

Question 1

Epithelial Tissues

Answer 1

Cover body surface and line hollow organs, body cavities, and ducts; they also form glands. This tissue allows the body to interact with both its internal and external environments.

Question 2

Connective Tissues

Answer 2

Protect and support the the body and its organs. Various types of connective tissues bind organs together, store energy reserves as fat, and help provide the body with immunity to disease-causing organisms.

Question 3

Muscular Tissues

Answer 3

Are composed of cells specialized for contraction and generation of force. In the process, muscular tissues generate heat that warms the body.

Question 4

Nervous Tissue

Answer 4

Detects changes in a variety of conditions inside and outside the body and responds by generating electrical signals called nerve action potentials (nerve impulses) that activate muscular contractions and glandular secretions.

Question 5

The Four Types of Simple Epithelium

Answer 5

Simple squamous epithelium
Simple cuboidal epithelium
Simple columnar epithelium (nonciliated and ciliated)
Pseudostratified columnar epithelium (nonciliated and ciliated)

Question 6

The Four Types of Stratified Epithelium

Answer 6

Stratified squamous epithelium
Stratified cuboidal epithelium
Stratified columnar epithelium
Transitional epithelium

Question 7

Simple squamous epithelium

Answer 7

Present at sites of filtration (such as blood filtration in kidneys) or diffusion (such as diffusion of oxygen into blood vessels of lungs) and at site of secretion in serous membranes. Not in body area subject to mechanical stress (wear and tear)

Question 8

Simple cuboidal epithelium

Answer 8

Secretion and absorption. Lines kidney tubes and covers surface of ovary.

Question 9

Nonciliated simple columnar epithelium

Answer 9

Secretion and absorption; larger columnar cells contain more organelles and thus are capable of higher level of secretion and absorption than are cuboidal cells. Line gastrointestinal tract (from stomach to anus)

Question 10

Ciliated simple columnar epithelium

Answer 10

Cilia beat in unison, moving mucus and foreign particles toward throat, where they can be coughed up and swallowed or spit out. Coughing and sneezing speed up movement of cilia and mucus. Line some bronchioles of respiratory tract.

Question 11

Pseudostratified columnar epithelium

Answer 11

Ciliated variety secretes mucus that traps foreign particles, and cilia sweep away mucus for elimination from body; nonciliated variety functions in absorption and protection.

Question 12

Stratified squamous epithelium

Answer 12

Protection against abrasion, water loss, ultraviolet radiation, and foreign invasion. Both types from first line of defense against microbes. Keratinized forms superficial layer of skin. Nonkeratinized lines wet surfaces

Question 13

Stratified cuboidal epithelium

Answer 13

Protection; limited secretion and absorption. Ducts of adult sweat glands and esophageal glands, part of male urethra.

Question 14

Stratified columnar epithelium

Answer 14

Protection and secretion. Lines part of urethra, and esophageal glands.

Question 15

Transitional epithelium

Answer 15

Allows urinary organs to stretch and maintain protective lining while holding variable amounts of fluid without rupturing