Intro to tissues Flashcards
List the four tissue types.
Epithelium, muscle, nervous, connective
What is the general function of:
a) Epithelium
b) muscle
c) nervous
d) connective
a) covers body surfaces, lines cavities, forms glands
b) underlies or supports other 3 tissue types structurally and functionally
c) movement
d) receive, transmit, and integrate information from outside body to control activities inside the body
Epithelium:
a) Forms a ___ between the internal and external environments
b) How does it get its nutrients?
c) What 3 things does the epithelium do for the body?
d) What are some examples of how the epithelium facilitates transport?
e) What are some examples of the epithelium’s sensory function?
a) Selective barrier
b) All epithelium is avascular so it receives nutrients from the layer of connective tissue that it sits on top of
c) Barrier, transport, sensory
d) cilia, gas exchange, absorption, secretion
e) Tastebuds, hair cells in inner hear, olfactory cells
What sub-categories of tissue encompass connective tissue?
Cartilage Bone Fibrous (ex: collagen) Adipose Hematopoetic Lymphatic
What two sub-categories of tissue encompass nervous tissue?
Neurons
Glia
What are glia?
Cells that support neurons through body
What 3 glial cells are active in the central nervous system?
Astrocyte - support and health of neurons
Oligodendrocyte - produce myelin
Microglia - macrophages
What 2 glial cells are active in the peripheral nervous system?
Schwann cell - produces myelin
Satellite cell - surround ganglion
Describe the classification scheme of epithelial tissue.
Epithelium is characterized based off the arrangement of cells (simple, stratified, pseudo stratified, transitional), the shape of the cells (squamous, cuboidal, columnar), and the apical surface (i.e. cilia, keratinized, etc.)
What is an important electrical characteristic of epithelial cells?
They are polarized - maintain membrane potential which allows for flow of ions in/out of cell
What is the difference between smooth and striated muscle?
The appearance is of course different (striated has clear banding pattern) but striated tends to be voluntary muscle control and smooth is involuntary.
What are the sub-categories of striated muscle?
Skeletal
Cardiac
Visceral (ex: tongue)