ANATOMY 2 Flashcards
What are the substances that constitutes all matter?
Elements
True or false: the body is composed of chemicals
True
What four elements are most plentiful in the human body?
Hydrogen, oxygen, nitrogen, and carbon
What is an atom made up of
Nucleus, protons, electrons, neutrons
___ is a positively charged particle
Proton
___ is a particle that has no electrical charge
Neutron
___ is a negatively charged particle
Electron
How do you determine an elements atomic number?
The amount of protons in its nucleus
When atoms combine, they gain or lose ___.
Electrons
How do you determine the atomic weight of an atom?
The number of protons and neutrons in its nucleus
What do you call atoms that have the same atomic number but different atomic weights?
Isotopes
An atom is inactive if it is ___.
Stable
What do you call atoms or molecules that have an electric charge due to the gain or loss of electrons
Ions
What is an Ionic bond?
A bond where atoms GAIN or LOSE electrons
What is a covalent bond?
A bond where atoms SHARED electrons
An ionic bond is formed by ___.
A positive and negative ion attracting each other
In forming a covalent bond, electrons are___.
Shared by two atoms
___ is a bond where electrons are shared but not equally, which results in one atom being slightly positively charged and the other being slightly negatively charged
Polar bond
What is an example of a polar molecule?
Water
When two different elements bond, they form ___.
Compounds
C6H12O6 is an example of a ___ formula.
Molecular
O This is an example of a\_\_\_ formula || /\ C------- /\ | | ---N / | | \/ \ | | // \\ C-------- \/ O N O || H O
Structural
What are two major types of chemical reactions?
Synthesis and decomposition
___ is a type of reaction in which multiple reactants combine to form a single product. Ex. A+B–> AB
Synthesis reaction
___ is a type of chemical reaction in which a single compound breaks down into two or more elements
Ex. AB–> A+B
Decomposition reaction
___ is a reaction in which two atoms or ions exchange places either in two different molecules or in the same molecule ex. AB+CD–>AD+BC
Exchange reaction
___ is a reaction that can proceed in either of two directions
Reversible reaction
What is anything that changes the rate of a reaction?
A Catalyst
___ are electrolytes that release hydrogen ion in water.
Acids
___ are electrolytes that release ions that bond with hydrogen ions.
Bases
HCL=?
Acid
NAOH=?
Base (anytime OH is put together, it is a base)
What does pH measure the concentration of?
Hydrogen ions
What is the pH of a neutral solution?
7
An inorganic substance that releases ions when it reacts with water is called an ___.
Electrolyte
Chemicals that include both carbon and hydrogen are called ___.
Organic
Chemicals that don’t include both carbon and hydrogen are called ___.
Inorganic
What are some organic chemicals?
Carbonhydrates, sugars, proteins, fats, nucleic acids
What are some inorganic chemicals?
Water, oxygen, carbon dioxide, and salts
Carbonhydrate molecules contain atoms of ___, ___, and ___.
Carbon, hydrogen, and oxygen
Fat molecules contain ___ ___and ___.
Fatty acids, glycerol
What are fats primarily used for in our bodies?
Store energy
Fats, phospholipids, and steroids are important ___ found in the human cell
Lipids
Organic substances that are insoluble in water but soluble in ether and chloroform are called ___.
Lipids
___is an enzyme that acts as a catalyst.
Protein
In addition to carbon, hydrogen, and oxygen, proteins also contain atoms of ___.
Nitrogen
What characteristics on protein determines its function?
It’s shape
What are two types of nucleicacids?
DNA, RNA
What are the functions of nucleic acids?
Store information and control life processes
What are examples of some elements?
Iron, silver, gold, aluminum, oxygen, nitrogen, carbon, hydrogen
Where are electrons located at in an atom?
In The electron shells around the nucleus
Unstable isotopes are ___, which mean they give off radiation.
Radioactive
What are radioactive isotopes Used for?
Treating cancer
What is the most common radioactive isotope?
Cobalt-60
If an atoms outer energy level is filled it is said to be ___.
Stable or inert
When 2 or more atoms Bond they form a ___.
Molecule
What is an example of a compound?
Water
What is a pH less than 7?
Acidic
What is a pH higher than 7?
Basic or alkaline
___ are a chemical that resist pH change
Buffers
___ is a solvent because many substances dissolve in it.
Water
What do you call a substance that dissolves in water?
Solute
Simple sugars are called ___.
Monosaccharides
What are examples of simples sugars?
Glucose and fructose
What are two important lipids?
Triglycerides, and phospholipids
Study diagram on page 45
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