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Anatomy > Tissues > Flashcards

Tissues Flashcards

1
Q

What is Histology?

A

Study of tissues

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2
Q

What are Tissues?

A

specialized cells that have a common function

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3
Q

What is an Extracellular Matrix?

A

fluids, protein fibers, and macromolecules that surround the tissue

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4
Q

What types of tissues are there?

A

Epithelial
Connective
Muscle
Nervous

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5
Q

What are their general functions?

A

Epithelial - covers and lines surfaces
Connective - provides support
Muscle - Movement
Nervous - Controls work

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6
Q

Characteristics of Epithelial

A

Little to no extracellular matrix
apical/basal/lateral surfaces
avascular
basement membrane
Lume

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7
Q

Functions of Epithelial

A

Protection
Selectively Permeable
Secretion
Absorption
Filtration
Sensation

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8
Q

Define Cell Junctions

A

Types of connections between the lateral surface of epithelial cells

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9
Q

Types of Cell Junctions

A

Tight Junctions
Desmosomes
Gap Junctions

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10
Q

Define Tight Junctions

A

adhering proteins that bind near the apical side of the cell, encircling the cell

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11
Q

Tight Junction is AKA

A

Zonula Occludens

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12
Q

Functions of Tight Junctions

A

creates a seal to prevent substances from passing between the cells

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13
Q

Tight Junctions are found in

A

GI tract
small/large intestine

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14
Q

Define Desmosomes

A

protein plaques w/ intermediate and protein filaments that are like a button between adjacent cells

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15
Q

Desmosomes is AKA

A

Macula Adherens

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16
Q

Functions of Desmosomes

A

prevents mech. stress
gets stuck together in order to prevent them to fall apart from each other

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17
Q

Desmosomes are found in

A

Skin
Heart
UterusDe

18
Q

Define Hemidesmosomes

A

half of a desmosome
anchors the cell at the basal side to the basement membrane

19
Q

Define Gap Junctions

A

uses connexon as a protein; transmembrane proteins in a circle to form a pore between cells

20
Q

Gap Junctions AKA

A

Nexus

21
Q

Functions of Gap Junctions

A

allows passage of molecules between cells to coordinate cellular activities or communication

22
Q

Gap Junctions are found in

A

respiratory tract w. cilia
cardiac muscle

23
Q

What are glands?

A

individual cells or organst

24
Q

What are glands made of?

A

mostly epithelial tissue

25
Q

What types of glands are there?

A

Exocrine
Endocrine

26
Q

Define Endocrine Glands

A

ductless glands that secrete hormones

27
Q

Define Exocrine Glands

A

contain ducts for secretions to fo to the surface locally

28
Q

Where are Exocrine Glands found?

A

Sweat, enzymes, saliva

29
Q

Characteristic of Unicellular

A

may not have ducts

29
Q

What are the Exocrine glands # of cells?

A

Unicellular
Multicellular

30
Q

Characteristic of multicellular

A

contains acini
- sacs that secrete products into ducts

30
Q

Merocrine Glands are found in

A

Saliva, tears, sweat, etc

30
Q

What are the 3 secretion methods of Exocrine Glands?

A

Merocrine Glands
Apocrine Glands
Holocrine Glands

31
Q

Define Merocrine Glands

A

secretions packaged in vesicles within cells and then released to the environment

32
Q

Define Apocrine Glands

A

AG accumulate secretions at apical part of therir cytoplasm pinch off and release secretions

32
Q

Define Holocrine Glands

A

cells that accumulate secretions and then disintegrate more viscous (thickly)

33
Q

Apocrine Glands are found in

A

skin, axillary, inguinal, anal , armpit, groin, mammary glands and areolar regions

34
Q

what is the Epi tissues classified by?

A

the amount/number of layers and shape of the cell

34
Q

Holocrine Glands are found in

A

sebacous glands in skin

35
Q

What are the layers of the epithelial tissue

A

Simple Epithelium
Stratified Epithelium

36
Q

Define Simple Epithelium

A

single layer of

Anatomy (3 decks)

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