A & P Section 2 Review

Chapter two Review: The Chemical Amount of Organization

Biochemistry and biology Review:

Atoms- smallest products of subject, composed of subatomic particles Protons- positive impose, in nucleus

Neutrons- natural charge, in nucleus

Electrons (e-)- unfavorable charge, orbit nucleus (never touch that! ) Atomic mass- protons + neutrons

Atomic number- number of protons

*Hydrogen only has one proton and one electron, no neutrons

When hydrogen loses it is electron, it is often referred to as a " proton” (hydrogen ion) and includes a +1 demand

Electrons group of friends the nucleus in orbitals or pathways

Closest orbit (shell) to nucleus, lowest energy, hold 2 eSecond shell out keeps 8 e-, as does the 3rd atoms with unfilled shells are reactive and bind together to complete their very own shells Molecule- 2 or even more atoms that share bad particals (covalent bond) Compound- 2 or more several atoms, connect is certainly not important (covalent or ionic) Covalent bond- atoms talk about electrons

Extremely covalent bond- charged molecule due to unequal sharing of eNonpolar covalent bond- no charge, equal sharing of eIonic bond- atom that has shed e- (cation, +) or gained e- (anion, -) are drawn to each other Salt- ionic mixture

Hydrogen bond- occurs between molecules which have polar covalent bonds Metabolism- all of the reactions in the body any kind of time given instant Building- anabolic, synthesis, dehydration rxn's (require input of energy- endergonic) Breaking down- catabolic, decomposition, hydrolytic rxn's (release energy- exergonic) You must review substance notation, Desk 2-2, pg 37, if you are not familiar. Electrolytes- soluble inorganic molecules whose ions carry out and electric current in solution *critical to homeostasis, controlled by simply kidneys, gastrointestinal system, skeletal system Hydrophobic molecules- no charge, get across cellular walls, i. e. fats, lipids ( nonpolar covalent bonds) Hydrophilic molecules- charged, are unable to cross cellular membranes, i actually. e. ions, glucose (polar covalent bonds)

pH is very important! If you do not...



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