1A Flashcards
The maintenance of a stable internal environment is called?
Homeostasis
Three components involved with homeostatic mechanisms_______?
1.)Receptor 2.) Control Center 3.) Effectors
Negative feedback mechanisms regulate:
A.) Body temperature B.) Nutrient levels in blood such as glucose levels C.) Blood Pressure
Positive feedback mechanisms regulate:
A.) Formation of blood clots B.) Milk Production C.)Uterine Contractions
Anything with mass and volume ( Anything that has weight and takes up space).
Matter
Chemical identical atoms, the fundamental substance that composes matter_____
Elements
Smallest particle of an element
Atom
Carries a positive charge
proton
Carries a negative charge
electron
Carries no charge
neutron
Nucleus contains_____
Protons and Neutrons
The number of “protons” found in the nucleus in an atom
Atomic Number
The number of “protons and neutrons” found in the nucleus
Mass Number
The number of protons plus the number of neutrons in each of an elements atoms is __________
Atomic Weight
Have an equal number of protons & electrons, but more electrons
Polar molecules
When two or more atoms bond, they form a new kind of particle called _____
Molecule
If atoms of different elements combine, they form Molecules of substances referred to as
compounds
Consist of two different elements that are bonded together by charges
Ionic Compounds
The starting materials are known as ______
reactants
The ending materials are known as _______
products
When two or more Atoms, Ions, or Molecules combine to form a larger, more Complex Molecule, the reaction is called _________
Synthesis
Inorganic substances include
Water, Oxygen, Carbon Dioxide, Inorganic salts
Organic substances include
Lipids, Nucleic Acids, Proteins, Carbohydrates
Building blocks of carbohydrates are _____
Monosaccharides
Building blocks of Lipids are ____
3 fatty acids and 1 glycerol
Building blocks of proteins are ______
Amino Acids
Building blocks of Nucleic Acids are ______
Nucleotides
Considers the composition of substances and how they change _______
Chemistry
Elements comprise over ____% by weight of the human body?
95
Contains fewer Hydrogen Ions (H+) than Hydroxyl Ions (OH-)
Basic Solutions
Contains more Hydrogen Ions (H+) than Hydroxyl Ions (OH-)
Acidic Solutions
