Physiology - Cell Membrane and Ion transport Flashcards
true or false diffusion results from the random, thermal movement of molecules
a. true
b. false
a.true
which type of molecules diffuse better than predicted based on lipid solubility due to the presence of carrier molecules / ion channels?
a. fatty acids
b. proteins
c. ions
d. steroid hormones
c.ions
which molecule size diffuses faster?
a. smaller
b. larger
a.smaller
the total number of dissolved particles per litre of solvent (water/plasma) is known as..
a. osmolarity
b. osmalality
a.osmolarity
one gram molecular weight of substance divided by the number of freely moving particles each molecule can liberate in a solution is known as..
a. osmolarity
b. osmalality
c. osmole
c.osmole
the actual effect of water on living cells is known as…
a. osmolarity
b. osmolality
c. tonicity
c.tonicity
in healthy people plasma and interstitial fluid is …………. in relation to cells?
a. isotonic
b. hypertonic
c. hypotonic
a.isotonic
in relation to cells IV fluid is…
a. isotonic
b. hypertonic
c. hypotonic
a.isotonic
when plasma has more osmotically active particles than intracellular fluid it is known as..
a. hypertonic
b. hypotonic
a.hypertonic
leads to crenation
when plasma has less osmotically active particles than intracellular fluid it is known as..
a. hypertonic
b. hypotonic
b.hypotonic
leads to lysis
the hydrostatic pressure needed to oppose osmotic effect of a solution and prevent net movements..
a. osmolality
b. osmolarity
c. osmotic pressure
c.osmotic pressure
carrier proteins that bind to specific substrates then undergo a conformational change to release the molecule on the other side carry out which transport
a. facilitated diffusion
b. primary active transport
c. secondary active transport
a.facilitated diffusion
ewhat type of transport requires carrier proteins and energy released by the hydrolysis of ATP?
a. facilitated diffusion
b. primary active transport
c. secondary active transport
b.primary active transport
what type of transport releases energy through the passive movement of the substance down its electrochemical gradient which is used to transport another substance down its gradient?
a. facilitated diffusion
b. primary active transport
c. secondary active transport
c.secondary active transport
a carrier that transports different substances in the same direction is known as?
a. uniport
b. symport
c. antiport
b.symport
a carrier that transports different substances in opposite directions is known as?
a. uniport
b. symport
c. antiport
c.antiport
what is ingestion by the cell known as?
a. phagocytosis
b. exocytosis
c. endocytosis
c.endocytosis
what type of endocytosis includes the cellular uptake of ligands/molecules that bind to specific receptors?
a. receptor mediated
b. phagocytosis
c. pinocytosis
a.receptor mediated
what type of endocytosis includes the ingestion of large particles eg bacteria, whole cells and tissue pieces?
a. receptor mediated
b. phagocytosis
c. pinocytosis
b.phagocytosis
what type of endocytosis includes the ingestion of ingestion of fluid and macromolecules or minute particles?
a. receptor mediated
b. phagocytosis
c. pinocytosis
c.pinocytosis
what type of endocytosis involves clathrin coated pits and is involved in uptake of LDL,transferrin and hormones
a. receptor mediated
b. phagocytosis
c. pinocytosis
a.receptor mediated
what type of endocytosis involves some cell types and involves uptake of bacteria,whole cells and tissue pieces
a. receptor mediated
b. phagocytosis
c. pinocytosis
b.phagocytosis
what type of endocytosis occurs mostly in cell membranes with the membrane folding inwards forming a vesicle containing ECF and solutes?
a. receptor mediated
b. phagocytosis
c. pinocytosis
c.pinocytosis
the coated pits molecules attach to receptors on in receptor mediated endocytosis are a latticework of what?
a. collagen
b. keratin
c. fibrin
d. clathrin
d.clathrin
the process of the membrane changing , the pit moving inwards and proteins closing over to from a vesicle in receptor mediated endocytosis requires ATP and?
a. sodium
b. iron
c. calcium
c.calcium
actin and contractile fibrils in cytoplasm surround the phagosome and push it into the cell interior in phagocytosis this requires ATP and..
a. sodium
b. iron
c. calcium
c.calcium
what proteins are involved in exocytosis?
a. actin
b. SNARE
c. contractile proteins
b.SNARE
