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24 terms

Osmosis, Permeability & Histology Lab

STUDY
PLAY
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)