Osmosis, Permeability & Histology Lab

24 terms by yend0h 

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Tissues

groups of cells which are similar in structure and function

Types of Tissues

epithelial
connective
nervous
muscle

4 Functions of Epithelial Tissue

protects
absorbs
fitration, secretion, excretion
sensory receptors

5 Characteristics of Epithelial Tissue

cellularity and special contacts
polarity (one free surface)
basement membrane
avascularity
regeneration

Connective Tissue

most abundant tissue in the body

2 Functions of Connective Tissue

protects and supports
binds other tissues

2 Characteristics of Connective Tissue

rich supply of blood vessels
matrix within cell
-ground substance
-fibers: elastic, collagen, retilcular

Types of Connective Tissue

Connective Tissue Proper
Cartilage
Bone
Blood

Types of Connective Tissue Proper

Areolar
Adipose
Reticular
Dense (Fibrous)

Sebacious Glands (3)

all over except palms and soles
hair mostly
sebum (lubricant)

Sweat Glands (3)

all over
outlets-pores
sweat, milky protein, fat-rich substances

Plasma Membrane Selective Permeability

lets nutrients in
keeps valuable cell proteins and substances in
keeps undesirable substances out
excretes or passes waste to exterior

Types of Transport through Plasma Membrane

Passive - pressure/gradient difference
Active - ATP

Where Diffusion/Filtration are used in the body

Diffusion-every cell
Filtration-only in capillary walls

Brownian movement

random motion of small particles suspended in water

Kinetic Energy

energy of motion, possessed by all objects, directly related to mass and velocity

Diffusion

movement of molecules from a region of higher concentration to a region of lower concentration; movement down a concentration gradient

Kinetic Energy

the driving force of diffusion

Simple Diffusion

diffusion of solutes through a selectively permeable membrane

Osmosis

diffusion of water through a selectively permeable membrane

Facilitated Diffusion

molecules combine with carrier proteins to move through a selectively permeable membrane

Isotonic Solution

concentration of solutes is equal, water goes in both directions, no shape change

Hypertonic Solution

concentration of solutes is greater inside the cell, water leaves cell and cell shrinks (crenation)

Hypotonic Solution

concentration of solutes is greater outside the cell, water enters cell and cell expands and bursts (hemolysis)

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