chemistry
different atoms of the same element
plane that divides the body into superior and inferior sections
what is the transverse plane?
amphiphilic molecule with a phosphate head and fatty acid tails
net movement of substances from an area of greater concentration to lesser concentration due to kinetic energy
what is diffusion?
this tissue looks multilayered but isn't, secretes mucus, and has cilia
what is pseudostratified epithelium?
the time required for half of the radioactive material to be eliminated from the body
what is biological half-life?
this means it affects both sides equally
what is bilateral?
the ability of the membrane to control which/how much of substances enter or leave the cell
what is selective permeability?
movement of small ions through water-filled protein channels
what is channel-mediated diffusion?
this is made up of tissue fluid, extracellular fluid, interstitual fluid, and fibrous proteins
what is the extracellular matrix?
atoms that both require and share electrons
what is a covalent bond?
cavity that is anteriorly placed in the body and does NOT completely encase organs in bone
what is the ventral cavity?
this describes the structure of the membrane- including phospholipids, proteins, cholesterol, and carbohydrates- and gives it fluidity/flexibility
what is the fluid mosaic model?
a transmembrane protein that can carry two or more solutes at the same time in the same direction
what is symport?
this tissue binds, supports, and protects organs and is highly vascular
what is connective tissue?
water and a nonpolar liquid substance that does not mix unless shaken
what is emulsion?
thin, double-layered membrane that lines the ventral body cavity and its organs
what is the serous membrane?
unique fuzzy coat on plasma membrane surface that helps protect and bind the cell- made of glycoproteins and glycolipids
what is the glycocalyx?
cell shrinkage due to a hypertonic environment
what is crenation?
this gland has vesicles that release their secretions by exocytosis
what is a merocrine gland?
weak chemical attractions between molecules that are important for the shape of complex molecules
what are intermolecular attractions?
this regulates homeostatic systems by fluctuating within a normal range around a set point
what is negative feedback?
a 4-ring lipid molecule within the hydrophobic region of the bilayer; this strengthens the membrane
what is cholesterol?
this is responsible for transport of sodium out of the cell and potassium into the cell
what is the sodium-potassium pump/Na-K ATPase?
this junction is like a patch that holds cells together and keeps them from pulling apart
what is a desmosome?