The CELL: prt 2 Flashcards
tissues are made up of ______water
70-90%
tissues are ____solids
10-30%
This is the major component of the cell
Water
often referred to as an inert space filter in a living organism
Water
It is a strong dipole and has a high
dielectric constant
Water
- It is highly reactive with unusual properties different physically and chemically from other common liquids
Water
___ and its ionization products ___and ___ are important factors in determining the structure and biological properties of proteins, nucleic acids, lipids, and other cell components
Water
H+ and OH-
- governed by the physical laws of osmosis and diffusion
- any disturbance to water equilibrium leads to an alteration in water distribution
Water: Found partly in free state
- held in a state of hydrophilic colloid
system, thereby forming a constant
constituent of the cell itself - responsible for the maintenance of the shape and size of the cell
- the amount of fixed water in tissues varies with their functional activities
Water: Fixed State
INORGANIC CONSTITUENTS: In the form of chlorides, sulfates, phosphates, carbonates
Sodium
Potassium
Calcium
INORGANIC CONSTITUENTS: In combination with organic radicals
Iron
Iodine
Manganese
Cobalt
Zinc
ORGANIC CONSTITUENTS
- CHONs
- CHO
- Lipids
- Oxygen
- Carbon dioxide
PROPERTIES OF WATER OF BIOLOGICAL
IMPORTANCE
- It is an electron dipole.
- It is a universal solvent.
- An ideal medium for the ionization of substances.
- Freezing point, boiling point, vapor pressure, osmotic pressure are altered by dissolved solutes.
- High surface tension.
- High specific heat.
- High latent heat of vaporization
- High latent heat of fusion.
- Has the capacity to conduct heat readily.
WATER PROPERTIES
Water is cohesive
Water is adhesive
Water is called “Universal solvent
Water exhibits evaporative cooling
Water expands during freezing
