Complete Questions With 100% Verified answer
What is the difference between anatomy and physiology
anatomy- study of structure
physiology- study of function
what are the levels of organization
subatomic particle- protons, electrons, neutrons
atom
molecule
macromolecule
organelle
cell
tissue
organ
organ system
organism
what are the characteristics of life?
movement
responsiveness
respiration
absorption
secretion
digestion
assimilation- changing of absorbed substances into chemically different forms
circulation
reproduction
growth
what are the requirements of life?
water
food
heat
pressure
oxygen
define homeostasis
maintaining of a stable enviroment
what is a homeostatic mechanism
,monitors aspects of internal environment and corrects as needed
*negative feedback mechanism
define matter
anything that takes up space and has mass
element
composed of chemically identical atoms
atom
smallest particle of atom, basic unit of matter
what are structure of an atom
nucleus
protons
neutron
electrons
define nucleus, proton, electron, neutron
nucleus- central part of atom
proton- positive charge
electron- negative charge
neutron- no electrical charge
ionic bond
formed when electrons are transferred from one atom to another
what are covalent bonds
when two molecules share electron
hydrogen bond
formed between water molecule, attraction between positive end of polar molecule and negative end of
another polar molecule
define synthesis, decomposition, and exchange reactions
Synthesis- A+B=AB
Decomposition- AB=A+B
exchange- AB+CD=AD+BC
define reactant
starting materials of reactions
product
, ending material
define catalyst
a substance that speeds up a chemical reaction
what is an acid
dissociates with water
base
combines in water
what happens to salts when dissolved in water and what is produced?
The salt molecules are "torn apart" by the water, and are reduced to sodium (Na+) and chlorine (Cl-)
ions.
what is the pH scale? what ions are involved in the pH scale?
pH scale- indicated the concentration of hydrogen ions in a solution, H+ and OH-
organic molecule
contains Carbon and hydrogen and dissolves in water.
inorganic molecule
does not contain C and H and dissociates with water
What is dehydration synthesis
taking water out (producing water) to form a new product. Uses energy
hydrolysis
separation of two macromolecules by adding water. Releases energy
what are carbohydrates
provide energy and cell structure
lipids
provide energy and cell structure
proteins
structural material, enzymes, energy, hormones,
nucleic acids
store information for protein synthesis, control cell activity
what are amino acids?