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Medtech > Tissues > Flashcards

Tissues Flashcards

1
Q

The substitution of viable cells for dead cells by

regeneration or fibrosis.

A

Tissue repair

p.70

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2
Q

In this process, stem cells, which can divide

throughout life, and other dividing cells regenerate new cells of the same type as those that were destroyed.

A

Regeneration

p.70

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3
Q

In this process, the destroyed cells

are replaced by different cell types, which causes scar formation.

A

Fibrosis

p.70

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4
Q

It involves

  • clot formation,
  • inflammation,
  • the formation of granulation tissue,
  • regeneration or fibrosis of tissues.
A

Tissue repairs

p.70

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5
Q

Effects of Aging on Tissues

A
  1. Cells divide slower as people age which cause injuries to heal slowly
  2. Extracellular matrix containing collagen and elastic fibers becomes less flexible and less elastic.

p.70

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6
Q

What will happen if the extracellular matrix become less flexible and elastic?

A
  • skin wrinkles,
  • elasticity in arteries is reduced,
  • bones break more easily

p.70

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7
Q

A group of specialized cells and the extracellular

substances surrounding them.

A

Tissue

p.70

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8
Q

What do you call the microscopic study of tissue

structure?

A

Histology

p.70

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9
Q

Types of Tissues

A
  • epithelial,
  • connective,
  • muscle,
  • nervous.

p.70

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10
Q

TRUE OF FALSE !!

The structure of each tissue type
is related to its function,

and the structure of the tissues in an organ
is related to the organ’s function

A

TRUE , it is related

p.70

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11
Q

TRUE OR FALSE !!

If there are changes in tissues, it can result in development, growth, aging, trauma, or disease.

A

TRUE

p.70

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12
Q

Give an example of a situation wherein

changes in tissues occurred.

A

Skeletal muscles enlarge because
skeletal muscle cells increase in size
in response to exercise.

p.70

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13
Q

One way to identify tissue

abnormalities, including cancer after changes in tissue happened.

A

Microscopic examination

p. 70

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14
Q

IDENTIFICATION

List the general characteristics of epithelial tissue.

A
  1. Mostly composed of cells.
  2. Covers body surfaces.
  3. Distinct cell surfaces.
  4. Cell and matrix connections.
  5. Nonvascular
  6. Capable of regeneration.
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15
Q

Epithelial tissue consists almost

entirely of cells, with __________________________

A

with very little extracellular matrix

between them.

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16
Q

Where is the body surface located?

A
  • the exterior surface,
  • the LINING of the digestive urinary, reproductive, and respiratory tracts,
  • the heart and blood vessels,
  • linings of many body cavities
17
Q

Why are epithelial cells characteristics include having distinct cell surfaces?

A

because epithelial cells have 3 distinct surfaces :

  • free or apical surface (exposed)
  • lateral surface (attached to others)
  • basal surface (base)
18
Q

This specialized type of extracellular material helps attach the epithelial cells to the
underlying tissues.

A

The basement membrane

19
Q

TRUE OR FALSE

All epithelial tissues have basement membranes.

A

A few epithelial tissues, such as

those in lymphatic capillaries and liver sinusoids, do not have basement membranes,

20
Q

TRUE OR FALSE
Basement membranes play
an important role in supporting and guiding cell migration during tissue repair.

A

True

21
Q

“epi” means

A

on

22
Q

“thele” in epithelia means

A

covering or lining

23
Q

Why are epithelial tissues non vascular?

A

Blood vessels in the underlying connective
tissue do not penetrate the basement membrane to reach the epithelium;

(non vascular means not related to blood vessel)

24
Q

The major functions of epithelia

A
  1. Protecting underlying structures.
  2. Acting as a barrier.
  3. Permitting the passage of substances.
  4. Secreting substances.
  5. Absorbing substances.
25
Q

Give an example of epithelium that act as a barrier

A

Epithelium on skin act as a barrier acts as a barrier to water and reduces water loss from the body. It also prevents many toxic molecules and microorganisms from entering the body.

26
Q

Give an situation wherein epithelium permits the passage of substances.

A

For example,

oxygen and carbon dioxide are exchanged between the air and blood by diffusion through the epithelium in the lungs.

27
Q

Which glands that are composed of epithelial cells?

A

Sweat glands, mucous glands, and the
enzyme-secreting portion of the pancreas are all composed
of epithelial cells

28
Q

This tissue covers and protects

surfaces, both outside and inside the body.

A

Epithelial cells

Medtech (1 decks)

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