Chemical Composition Flashcards
(19 cards)
True or False:
Tissues are made up of 70-90% water, 10-30% solids
, 1% is inorganic and the rest are organic substances
True
- This is the major component of the cell
- often referred to as an inert space filter in a living organism
- It is a strong dipole and has a high dielectric constant
- It is highly reactive with unusual properties different physically and chemically from other common liquids
Water
True or False:
Water and its ionization products H+ and OH- are important factors in determining the structure and biological properties of proteins, nucleic acids, lipids, and other cell components.
True
True or False:
Water is found partly in free state
True
True or False:
Water is not governed by the physical laws of osmosis
and diffusion
False
True or False:
Any disturbance to water equilibrium leads
to an alteration in water distribution
True
- 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
Fixed State of Water
True or False:
The amount of fixed water in tissues varies with their functional activities
True
What are the Inorganic Constituents:
✓ Sodium
✓ Potassium
✓ Calcium
✓ Ammonium
✓ Iron
✓ Iodine
✓ Manganese
✓ Cobalt
✓ Zinc
What are the Organic Constituents:
✓ CHONs
✓ CHO
✓ Lipids
✓ Oxygen
✓ Carbon dioxide
What are the 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.
True or False:
Water is cohesive
True
“sticks to itself”
Cohesion
True or False:
Water is not adhesive
False
“sticks to other things”
Adhesion
▪ is called “Universal solvent
▪ dissolves many other substances due to
polarity
Water
Differences in charges pulls/pushes substances apart (Like a magnet attracts or repels other magnets)
Polarity
True or False:
Water exhibits evaporative cooling
▪ removes heat when it evaporates from a
surface
True
True or False:
Water expands during freezing: expands into crystal
formation releasing heat
True
