Brownian - Study guides, Class notes & Summaries

Brownian motion the movement of molecules powered by random fluctuations of environmental energy Brownian motion of what molecule initiates many biochemical interactions? water Is water polar or non polar? polar Polarity enables what type of. bonding between H2O molecules? hydrogen bonding Polarity of water accounts for what? the cohesiveness of water and its ability to dissolve many biochemicals. Hydrophobic effect Inability of water to dissolve nonpolar molecules Electrostatic intera...

DAT BIOLOGY Exam Questions With Verified Answers. Cell Theory: - answer1. all living things are composed of cells 2. cell is the basic fundamental unit of life 3. chemical reactions of life take place inside the cell 4. cells arise from pre-existing cells 5. cells carry genetic information in the form of DNA - passed from parent to daughter cell nucleolus - answer- dense structure in the nucleus where ribosomal RNA synthesis occurs Endoplasmic Reticulum - answer- network of membrane- enc...

chloroplasts - -contain the pigment chlorophyll -chlorophyll absorbs red, blue, & violet light ATP - -used to transport E around cells -chemical E stored in the bonds -important bonds between 2nd and 3rd phosphate group -going to lower energy state breaks bonds and releases the energy each molecule during diffusion - -moves randomly -behavior unpredictable -each individual molecule never stops moving dragon fly size - -high O2 levels in carboniferous allowed them to grow big -later in ...

Which of the following parameter adjustments will SHORTEN can time in an MR pulse sequence? correct answersDecrease TR, Increase ETL, Decrease NEX, Enable half fourier, Increase the parallel imaging factor All of the following artifacts except _____ occur along the phase encoding axis. correct answersChemical Shift Magnetic susceptibility artifacts are more prominent with ______ sequences. correct answersGradient Echo A remedy for a Gibbs trunctation artifact would be.. correct answersA...

1 millionth of a meter is called a _____? - ANSWER ☑☑Micrometer or Micron The air we breath is composed mainly of ______? - ANSWER ☑☑Nitrogen The size of particles in outdoor air are mainly _____ and smaller - ANSWER ☑☑1 micrometer ___________ (size) particles behave like a gas, have negligible settling rates, and are affected by Brownian Motion. - ANSWER ☑☑Particles less than 0.1 micrometers Rated flow of air through a filter at specified pressure drop is called ...

ITEC Beauty Specialist - Skincare & Eye Treatments Questions and Answers Already Passed A birthmark is also known as; Naevae A moisturizing cream is best suited to what skin type? Mature A moisturizing lotion contains; 15% oil A natural astringent Lemon juice Alpha-tocopherol is the chemical name for; Vitamin E Ascorbic Acid is the chemical name for; Vitamin C Atom that gained an electron will become _________ charged negatively Atom that has donated an electron becom...

Differential media - allow certain bacteria to be differentiated from others by change of color, zone of clearing, or other Bacteria can prevent phage attachment and escape infection by acquiring mutations on genes which alter their _________. - cell surface receptors A _______ agent does not kill a microorganism, but rather just inhibits its growth. - bacteriostatic A clear area surrounded by growth of host cells is called a _______. - plaque A color change to yellow on the mannitol salt ...

dragon fly size - correct answer -high O2 levels in carboniferous allowed them to grow big -later in history predators constrained the max size O2 levels in atomosphere - correct answer cyanobacteria and green algae chloroplasts contributed.... through photosynthesis oldest fossils - correct answer 3.5-4 bya 1st insects - correct answer 480 mya 1st dinosaurs - correct answer 240 mya dinosaurs go extinct - correct answer 66 mya 1st homosapiens - correct answer 200k ya diffus...

Convulsions a sudden, violent, irregular movement of a limb or of the body, caused by involuntary contraction of muscles Hyponatremia - causes? Hyponatremia is a condition that occurs when the level of sodium in your blood is abnormally low. Sodium is an electrolyte, and it helps regulate the amount of water that's in and around your cells. Red Cell Crenation A process resulting from osmosis in which red blood cells, in a hypertonic solution, undergo shrinkage and acquire a notched or scallop...

TRUE or FALSE? Suppose that X1, X2,... is a stationary stochastic process with covariance function Rk = Cov(X1, X1+k), for k=0,1,... Then the variance of the sample mean can be represented as Var(X) = 1/n[Ro + 2(1-k/n)Rk] -Correct Answer TRUE TRUE or FALSE? If f(x, y) = cxy for all 0 < x < 1 and 1 < y < 2, where c is whatever value makes this thing integrate to 1, then X and Y are independent random variables. -Correct Answer TRUE. (Because f(x, y) = a(x)b(y) factors nicely, and t...