Cells and Tissues Flashcards
(19 cards)
What are the 4 tissue types?
Epithelial, muscle, neuronal, and connective.
What makes one cell type different from another?
Gene expression and proteins that are synthesised.
What functions do cell junctions serve?
Anchoring cells, obstructing passage between cells, and communication between cells.
What is the purpose of desmosomes?
To resist mechanical forces, e.g. in the skin or heart muscle.
Gap junctions allow for the passage of what between cells?
Ions and other small molecules.
Epithelial cells are anchored to the basement membrane by ____________.
Hemidesmosomes.
What are the roles of epithelial tissue?
Physical separation/protection, control of permeability, sensation, and specialised secretions.
The epithelial membrane barrier is maintained by __________ junctions and __________ junctions.
Tight, adherens.
The arrangement of epithelial cells into apical and basolateral surfaces is known as what?
Polarity.
Some epithelial cells have ________ which help move substances over the epithelial membrane.
Cilia.
What are the 3 shapes that epithelial cells have?
Squamous, cuboidal, columnar.
_______ cells are specialised epithelial cells for secretion
Gland.
__________ glands release secretions onto the epithelial surface.
Exocrine.
___________ glands release secretions into the bloodstream.
Endocrine.
What are the 3 modes of glandular secretion?
Merocrine, apocrine, and holocrine.
What are the four membrane types in the body?
Mucous, serous, synovial, and cutaneous.
Where are synovial membranes found?
In joints.
Which membrane is a double layer membrane that covers internal organs?
Serous membranes, e.g. the pericardium.
