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Science for Medicine Ellen > Tissues > Flashcards

Tissues Flashcards

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Biology 101 flashcards
1
Q

What are the 4 types of tissue?

A

Epithelial
Connective
Nerve
Muscle

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2
Q

What are the three types of cell-cell junstions?

A

Desmosomes
Tight junctions
Gap junctions

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3
Q

What is a desmosome?

A

Firm anchorage, non waterproof cell-cell junction

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4
Q

What is a tight junction?

A

Cell- cell junction which seals intercellular spaces

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5
Q

What is a gap junction?

A

Cell- Cell junction for cell communication

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6
Q

What is a hemi-desmosome?

A

Junction between cell and basement lamina

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7
Q

What are the roles of the epithelial tissue?

A 
Covering surfaces
If thin- For diffusion of substances
It thick- For protection
Movement - Cilia
Absorption -Microvilli
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8
Q

What are the three types of epithelial cell?

A

Squamous, Cuboidal and Columnar

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9
Q

What is the difference between simple and stratified epithelial layers?

A

Simple epithelial layers are one cell thick

Stratified epithelial layers are multiple cells thick.

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10
Q

What are glands?

A

Collections of secretory (mostly) epithelial cells

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11
Q

What is the difference between exocrine and endocrine glands?

A

Exocrine glands secrete onto surfaces

Endocrine glands secrete into the blood

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12
Q

How do endocrine glands form?

A

Cells proliferate to form a mass of secretory cells which loose contact with the surface and accumulate around a blood vessel.

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13
Q

How do exocrine glands form?

A

The epithelial layer is encouraged to invaginate, creating a tube.

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14
Q

What is the difference between tubular and acinar glands

A

Both are simple
Tubular glands are long thin invaginations that produce watery secretion
Acinar glands are short, grape like glands that produce a mucus secretion.

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15
Q

What is meant by the term compound gland?

A

Contains both tubular and acinar glands.

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16
Q

What is meant by a myoepithelial cell?

A

These specialised cells can double as a muscle cell to contract, squeezing out secretion.

17
Q

What type of tissue is adipose tissue?

A

This adipose (fat) tissue is connective tissue

18
Q

Describe the structure of an adipose cell?

A

Nucleus surrounded by thin layer of cytoplasm and larger layer of lipid.

19
Q

What is the extracellular matrix made up of?

A

Fibres (Collagen- in particular reticulum- and elastin)
Ground substance
Tissue fluid

20
Q

What type of tissue are cartilage, bone and adipose examples of?

A

Connective

Science for Medicine Ellen (22 decks)

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