A&P Tissues 1 (Chapter 4)

Examination of a tissue sample reveals groups of cells united by junctional complexes and interlocking membranes. The cells have one free surface and lack blood vessels. The tissue is most likely ________ tissue.

Epithelial

Glandular secretions are produced by which tissue type?

Epithelial

Keratin is a protein that is typically found in which tissue type?

Epithelial

Which type of tissue covers exposed surfaces of the body?

Epithelial

Simple cuboidal epithelium is found

Forming the kidney tubules

Describe the simplest type of unicellular exocrine gland.

Goblet cell; this cell is scattered among absorptive cells in the intestines.

Give the term for the "study of tissues."

Histology

Endocrine glands empty their products into ________ and contain ________, while exocrine gland secretions empty into ________ or onto surfaces.

Interstitial fluid; no ducts; ducts

What properties are common to keratinized epithelia?

Keratinized epithelia are both tough and water resistant.

All of the following types of epithelium can be found where absorption or secretion takes place except

Keratinized stratified squamous

The epithelial tissue that covers skin is classified as

Keratinized stratified squamous

Which type of glands secret their products by exocytosis?

Merocrine

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?

Stratified columnar

The ducts of sweat glands and mammary glands are covered by ________ epithelium.

Stratified cuboidal

________ epithelium is found lining the anus and vagina.

Stratified squamous

What is the functional significance of gap junctions?

They permit chemical communication (diffusion of ions and small molecules) that coordinates the activities of adjacent cells.

Identify the various types of epithelial intercellular connections.

Tight junctions, adhesion belts, gap junctions, and desmosomes

Identify the epithelium that lines the urinary bladder, and describe its unusual functional characteristic.

Transitional epithelium, allows for repeated stretching and recoiling back to its original shape

The body's most delicate type of epithelium is the ________ epithelium.

Simple squamous

Which tissue type lines the heart and blood vessels?

Simple squamous epithelium

Explain why a pseudostratified epithelium is not truly stratified.

All the cells form a single layer and contact the basement membrane.

Which surface of the cell is exposed to an internal or external environment?

Apical

Which of the following is a type of secretion in which some cytoplasm is lost with the product?

Apocrine

Which type of tissue fills internal spaces of the body?

Connective

What is the general shape of the epithelial cells that are nearest the lumen in an empty urinary bladder?

Cuboidal

In stratified epithelia adapted to resist mechanical forces, which of the following types of cell-to-cell junctions are especially abundant?

Desmosomes

The lining of the heart and blood vessels is called

Endothelium

Unicellular exocrine glands secrete

Mucus

Which type of tissue contracts to produce movements?

Muscle

Which type of tissue conducts electrical impulses?

Neural

Which epithelial cells, found lining the nasal cavities and the trachea, typically possess cilia?

Pseudostratified columnar