Chapter 4 Flashcards
Tissues
What are adipocytes?
lipid (fat) storage cells
What is adipose tissue?
specialized areolar tissue rich in stored fat
What is an anchoring junction?
mechanically attaches adjacent cells to each other or to the basement membrane
What is the apical surface?
that part of a cell or tissue which, in general, faces an open space
What is an apocrine secretion?
release of a substance along with the apical portion of the cell
What is apoptosis?
programmed cell death
What is areolar tissue?
(also, loose connective tissue) a type of connective tissue proper that shows little specialization with cells dispersed in the matrix
What is an astrocyte?
star-shaped cell in the central nervous system that regulates ions and uptake and/or breakdown of some neurotransmitters and contributes to the formation of the blood-brain barrier
What is atrophy?
loss of mass and function
What is the basal lamina?
thin extracellular layer that lies underneath epithelial cells and separates them from other tissues
What is the basement membrane?
in epithelial tissue, a thin layer of fibrous material that anchors the epithelial tissue to the underlying connective tissue; made up of the basal lamina and reticular lamina
What is cardiac muscle?
heart muscle, under involuntary control, composed of striated cells that attach to form fibers, each cell contains a single nucleus, contracts autonomously
What is a cell junction?
point of cell-to-cell contact that connects one cell to another in a tissue
What are chondrocytes?
cells of the cartilage
What is clotting?
also called coagulation; complex process by which blood components form a plug to stop bleeding
What is collagen fiber?
flexible fibrous proteins that give connective tissue tensile strength
What is connective tissue?
type of tissue that serves to hold in place, connect, and integrate the body’s organs and systems
What is the connective tissue membrane?
connective tissue that encapsulates organs and lines movable joints
What is connective tissue proper?
connective tissue containing a viscous matrix, fibers, and cells.
What is a cutaneous membrane?
skin; epithelial tissue made up of a stratified squamous epithelial cells that cover the outside of the body
What is dense connective tissue?
connective tissue proper that contains many fibers that provide both elasticity and protection
What is the ectoderm?
outermost embryonic germ layer from which the epidermis and the nervous tissue derive
What is elastic cartilage?
type of cartilage, with elastin as the major protein, characterized by rigid support as well as elasticity
What is elastic fiber?
fibrous protein within connective tissue that contains a high percentage of the protein elastin that allows the fibers to stretch and return to original size
What is an endocrine gland?
groups of cells that release chemical signals into the intercellular fluid to be picked up and transported to their target organs by blood
What is the endoderm?
innermost embryonic germ layer from which most of the digestive system and lower respiratory system derive
What is the endothelium?
tissue that lines vessels of the lymphatic and cardiovascular system, made up of a simple squamous epithelium
What is the epithelial membrane?
epithelium attached to a layer of connective tissue
What is epithelial tissue?
type of tissue that serves primarily as a covering or lining of body parts, protecting the body; it also functions in absorption, transport, and secretion
What is an exocrine gland?
group of epithelial cells that secrete substances through ducts that open to the skin or to internal body surfaces that lead to the exterior of the body
What is a fibroblast?
most abundant cell type in connective tissue, secretes protein fibers and matrix into the extracellular space
What is fibrocartilage?
tough form of cartilage, made of thick bundles of collagen fibers embedded in chondroitin sulfate ground substance
What is a fibrocyte?
less active form of fibroblast
What is fluid connective tissue?
specialized cells that circulate in a watery fluid containing salts, nutrients, and dissolved proteins
What is a gap junction?
allows cytoplasmic communications to occur between cells
What is a goblet cell?
unicellular gland found in columnar epithelium that secretes mucous