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S1 BIO 100 A&P 1 > Intro to tissues > Flashcards

Flashcards in Intro to tissues Deck (20)
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1
Q

Basement membrane

A

In collagen: thing, glue-like connection between a sheet of epithelial cells and underlying fibrous connective tissue. Serve as screens for blood capillaries and lining sacs

2
Q

Holding tissues together…

A
  1. ECM holds tissue in single mass, ECM binds to integrins
  2. Intercellular junctions hold cells in tissues, sheets, or continuous muscles
  3. ECM does not bind but is surrounding fluid
3
Q

Tissue repair

A

Via phagocytosis and regenteration (growth of functional new tissue)
- epithelial and some connective tissues have greatest ability to regenerate
- muscle and nervous tissue have limited capacity to regenerate
M: repair with fibrous CT, non-contractile and loses ability to function
N: repair needs neuralgia support

4
Q

Epithelial membranes (3)

A
  1. Cutaneous
  2. Serous
  3. Mucous
5
Q

Components of ECM

A
  1. Collagen
  2. Elastin
  3. Glycoproteins
6
Q

Tissue

A

A groups of similar cells that perform a common function. Group of cells that usually have a common origin inn an embryo and function together to carry out specialized activities

  1. Epithelial
  2. Connective
  3. Muscle
  4. Nervous
7
Q

Keloid

A

Atypical and unusually thick scar that may develop in the lower layer of the skin

8
Q

Body membrane

A

Thin, sheet like structure.

  1. Epithelial membranes
  2. Connective tissue membranes
9
Q

ECM

A

Extracellular matrix is fluid material between cells in tissue. Contains water, proteins, and proteogylcans

10
Q

Collagen

A

Occur in twisted bundles - Protein, white color - provide stength to tensile/longitudinal forces - most abundant protein compound in body - hydrated collagen = gelatin

11
Q

Mucus membrane

A

Lines organs/cavities that open to the exterior environment (respiratory, digestive, urinary, and reporductive tracts)

  • mucus: protection, lubricant, sticky trap for contaminants that is a watery secretion mixture of proteoglycans
  • clinically important because most likely to interact with external micro-organisms.
12
Q

Elastin

A

Provides elasticity and can be stretched 150% of relaxed length and return to normal without damage.

  • essentially tissue failure if stretched too far because cannot return to normal
  • held in fibrous shape by microfilaments
  • looks yellow
  • found in skin, blood vessel walls, structures of ear and lung tissue.
13
Q

Glycoproteins and protegylcans

A

P: carbohydrates with protein backbone
G: proteins with carbohydrate subunits
- unite cells and their surroundings into integral structure
- provides communication between ECM and cell to allow coordination of cell/tissue development, shape changes, cell movement

14
Q

Serous membrane

A

Lines organs/cavities that are not open to external environment. Produce a thing, waters fluid that lubricate organs to recur friction

  1. Parietal: lines walls of cavities
  2. Visceral: covers organs
15
Q

Connective tissue membranes

A

Synovial membranes lining the spaces between bones and joints that move

  • smooth, slick, secrete thick colorless lubrication fluid (synovial)
  • also line bursae between moving body parts
  • lack epithelium
16
Q

Cutaneous membrane

A

Covers body surfaces that are exposed to external environment and is the priamary organ of the integumentary system.
-largest organ - 16% of body weight - contains superficial layer of epithelial cells and underlying layer of supportive connective tissue

17
Q

Primary germ layers

A

Ectoderm: outer layer (skin, brain and spinal cord)
Mesoderm: middle layer (muscle, bones, etc)
Endoderm: inner layer (organs, lungs)

18
Q

Body membrane functions (5)

A
  1. Cover and protect body surface
  2. Line body cavities
  3. Cover the inner surfaces of hollow organs
  4. Anchor organs to each other or to bones
  5. Cover internal organs
19
Q

Scar

A

Dense fibrous mass when damage is too deep or large

20
Q

Reticular fibers

A

In collagen: 3D networks that support capillaries and nerve fibers. Thinner than collagen and made of reticulin