Lesson One Flashcards
What is the pH of blood?
7.4 pH
Blood temperature averages?
37 degrees Celsius
Negative feedback
The process by the body to become stable
Negative feedback description
Control centres in the brain and other organs release hormones that cause body reactions. Once normalcy is reached, the control centre is no longer stimulated.
Positive feedback
The process by the body to become unstable
Definition of positive feedback
Instead of achieving normalcy, the adaptive response further stimulus the regulatory centre. An increasingly unstable situation results.
Normal blood glucose levels
70-110 mg/dl
Is water organic
Nah it doesn’t have carbon
Covalent bond
Equal sharing of electrons
Ionic bond
Unequal sharing of electrons
Polar covalent
Molecules that have dipoles (regions with slight positive and negative natures).
What type of molecule is H2O
Polar covalent bond
Are water molecules loosely attracted to one another?
Yes
The negative charge on the oxygen attracts the positively charged hydrogen to produce….
A weak bond called a hydrogen bond
Hydrogen bonds are…
Weak
Each water molecule can form hydrogen bonds with up to ___ neighbours
4
Solution
Is a mixture of one or more soluble substances
Solute
Thing that is dissolved
Solvent
Liquid that dissolves solute
Water is a temperature moderator
Water absorbs a great deal of heat while only rising its temperature a slight amount. Water also releases heat slowly. This property is referred to as high heat of evaporation
Evaporative cooking
As a liquid evaporated the most energetic molecules are carried away leaving the lower kinetic molecules behind which cools the surface of the liquid
Cohesive
Water molecules stick to each other
Adhesive
Water molecules stick to other molecules
Buffer
Buffers are chemicals or combinations of chemicals that are able to keep pH levels constant despite adding more and more acid
