Intro to tissues Flashcards

1
Q

List the four tissue types.

A

Epithelium, muscle, nervous, connective

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2
Q

What is the general function of:

a) Epithelium
b) muscle
c) nervous
d) connective

A

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

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3
Q

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

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

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4
Q

What sub-categories of tissue encompass connective tissue?

A
Cartilage
Bone
Fibrous (ex: collagen)
Adipose
Hematopoetic
Lymphatic
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5
Q

What two sub-categories of tissue encompass nervous tissue?

A

Neurons

Glia

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6
Q

What are glia?

A

Cells that support neurons through body

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7
Q

What 3 glial cells are active in the central nervous system?

A

Astrocyte - support and health of neurons
Oligodendrocyte - produce myelin
Microglia - macrophages

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8
Q

What 2 glial cells are active in the peripheral nervous system?

A

Schwann cell - produces myelin

Satellite cell - surround ganglion

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9
Q

Describe the classification scheme of epithelial tissue.

A

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.)

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10
Q

What is an important electrical characteristic of epithelial cells?

A

They are polarized - maintain membrane potential which allows for flow of ions in/out of cell

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11
Q

What is the difference between smooth and striated muscle?

A

The appearance is of course different (striated has clear banding pattern) but striated tends to be voluntary muscle control and smooth is involuntary.

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12
Q

What are the sub-categories of striated muscle?

A

Skeletal
Cardiac
Visceral (ex: tongue)

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