Chapter 2 Part 1 Flashcards
Optic
Ear
Nasal
Nose
Oral
Mouth
Orbital
Eyes
Mental
Chin
Buccal
Cheeks
Frontal
Forehead
Occipital
Back of the head
Cephalic
Whole head
Cervical
Neck
Organs systems in head and neck regions
Nervous and endocrine
Endocrine system structures
Hormones, hypothalamus, pituitary gland, thyroid and adrenal gland
Parts of nervous system
Brain, spinal cord and nerves
Elements
The simplest form of matter to have unique chemical qualities. Cannot be broken down by ordinary chemical means
How many naturally occurring elements are there
91
What 6 elements are 98.5% of the human body
Oxygen, carbon,hydrogen, nitrogen, calcium ca, phosphorus
Lesser elements make up what percent of the body
.8
What are the six lesser chemicals in the body
Potassium k, sodium na, chloride cl, sulfur s, iron fe, magnesium mg
Trace elements make up what percent of the body
Less than .7
Minerals
Inorganic elements extracted from soil to plants and passed to humans
What are minerals important for
Body structure enzyme function
Electrolytes
Mineral salts needed for nerve and muscle function
3 components of an atom
Protons p+, neutrons n0 and electrons e-
What does the number of electrons tell you
Atomic number
Protons are and found where
Positive and found in nucleus
Neutron are and found where
Neutral and found in nucleus
Number of neutrons and protons is
Atomic mass
Isotopes are
Elements that have different number of neutrons
Ionizing
Ejects electrons destroys molecules
Electrons
Negatively charged found in energy levels around the nucleus
Number of electrons equals the number of protons in what
Neutral atom
Ions
An atom that gains or loses electrons
Cations
Positively charged ions
Anions
Negatively charged ions
Cations _____ electrons
Loses
Anions _____ electrons
Gains
Ionization
Transfer of electrons from one atom to another
Electrolytes are a substance that
Ionize in water
3 importance’s of electrolytes is
Chemical reactivity, osmotic effects electrical excitability of nerve and muscles
Molecule
Chemical particle composed of 2 or more atoms untied by a chemical bond
Compound
Molecule composed of 2 or more different elements
Molecular formula
Identifies elements and how many atoms of each are present
Structural formula
Identifies location of each atom
Chemical bonds
Hold atoms together within a molecule or attract one molecule to another
The most important types of chemical bonds
Ionic bonds, covalent and hydrogen bonds
Bonds are formed by
Using electrons in outer mot energy level valence shell
Octet rule
Atoms interact to fill their valence shell
Inert elements
Full valence shell will not make chemical bond with another atom
Reactive elements
Valence shell not full will make a chemical reaction
Ionize bond
Will transfer electrons
Single covalent bonds
One pair of electrons shared
Double covalent bonds
2 pairs of electrons shared
Nonpolar bonds
Electrons shared equally strongest bond
Polar bonds
Electrons not shared equally
Ionic bonds
Attractions between anions and cations easily broken by water
Hydrogen bonding
Weak inter molecular or intermolecular attraction between a slightly positive hydrogen and a slightly negative oxygen