Biology Questions and Answers
- What are the main water
properties that make water
special for life?
The water pbiologically important arroperties that make e molecularwater
polarity,specific heat), f thermal stabilityusion and ebullition (elevated
points that allow water to be liquid in
most eneutrality,nvironments, acid-b small molecular size ase (^) and low
chemical reactivity. (Compared to other
substances,sulfide.) like ethanol or hydrogen
- What are ions? What are
the two types of molecules
into which ions are classified?
Ions are atoms oelectrically charged by means or substances (^) f loss or
gain of electrons.
The two types of ions are the cations
and the anions. Cations arpositive total electric charge and anionse ions with (^)
are ions with negative total electric
charge.
- Which are the main
positive ions found in living
beings?
The main cations foare the sodium cation (Naund in living b+), the eings
potassium cation (K+), the calcium
cation (Fe+++), the magnesium cation (Ca++), the iron cations (FMge++++,), (^)
the zinc cation (Zn++) and the
manganese cation (Mn++).
- What are the main
negative ions found in living
beings?
The main aare the chlorinnions fe anion (Clound in living -), the beings
phosphate aanion (HCOnion (PO 4 --), the bicarbonate
and the sulfate anio^3 - ), the nitrate an (SO 4 - ).nion (NO^3 - )^ - How do mineral salts
participate in osmotic
regulation?
Osmotic pressure depends on the
number of particlessolution and not on the nature of such dissolved in a (^)
particles. Mineral salts, glucose,
proteins aregulating pnd urea are articles for the osmolarity ofthe main (^)
the organism. These molecules along
with otthe cell gher particlesenerate the larger or smaller inside and outside (^)
osmotic gradient between the
intracellular and the extracellular space.
- What is the role of mineral
salts in the creation of electric
tension (voltage) at the
cellular level?
The electric activity of the cell, for
example, different concentrationsin neurons, depends on the of positive an (^) d
negative ions between the inner and the
outer surfaces oMineral salts are responsible ff the cell membranor thate.
voltage.
The cell memhas commonly a nbrane of non-excited cellegative inner side and (^)
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