PHYS 261 WCU Week 2 Latest Update Actual Exam Questions and 100% Verified Correct Answers Guaranteed A+

PHYS 261 WCU Week 2 Latest Update Actual Exam Questions and 100% Verified Correct Answers Guaranteed A+ 3 subatomic particles - ANSWER-protons, neutrons, electrons .actavation energy - ANSWER-energy needed to start a reaction low- spontaneous rxn high-slow/or no .action potential - ANSWER-a very brief shift in a neuron's electrical charge that travels long distance toe to brain .active transport - ANSWER-a protein-mediated process that requires energy from ATP outside energy - phosphate bond of ATP .aerobic metabolism - ANSWER-Metabolism that can proceed only in the presence of oxygen. .afferent - ANSWER-sensory, towards CNS .all steroids begin with - ANSWER-cholesterol to become aldosterone, glucocorticoids, or sex hormones .Amine - ANSWER-amino acids tryptophan + tyrosine .An action potential - ANSWER-brief reversal of memb potential in which the memb potential changes from -70 to +30 3 main stages: DRH .Anabolic - ANSWER-utilize energy to synthesize lg biomols build up .anaerobic metabolism - ANSWER-metabolism in the absence of oxygen .Anion - ANSWER-negative ion nonmetals .ANS: Parasympathetic - ANSWER-rest and digest .antagonism - ANSWER-glucagon opposes insulin .Atom - ANSWER-Basic unit of matter .atomic mass - ANSWER-(at the bottom)Number of protons and neutrons .atomic number - ANSWER-number on top .autonomic nervous system: sympathetic - ANSWER-fight or flight .blood-brain barrier - ANSWER-A mechanism that prevents certain molecule from entering the brain but allows others to cross Astrocytes .buffer - ANSWER-minimizes changes in pH .Calcitionin - ANSWER-produced by c cells of thyroid gland reduce ca2+ decrease bone reabsorption + increase renal ca2+ excretion Released in hypercalcemia .Calcitrol - ANSWER-active form of vitamin D3 mobilize, renal reabsorption, increases intestinal absorption .calcium balance - ANSWER-osteoclasts Maintaining constant total amount of calcium .Catabolic - ANSWER-prod energy thru large molecules being broken down .Cation - ANSWER-positive ion metals .Cell - ANSWER-The basic unit of structure and function in living things .chemical work - ANSWER-the making and breaking of chemical bonds .chemically gated channels - ANSWER-controlled by intracellular messenger molecules or extracellular ligands that bind to the channel protein .CHO - ANSWER-most abundant Carbon, Hydrogen, Oxygen mono/disacch - simple sugar poly- complex .circardian rhythm - ANSWER-the biological clock; regular bodily rhythms that occur on a 24-hour cycle .conductor - ANSWER-a material through which electrons(+/-) move easily -water .Cones - ANSWER-color vision .control group - ANSWER-the group that does not receive the experimental treatment. .convergence - ANSWER-group of presynaptic neurons provide input into smaller number of postsynaptic neurons .Cortisol - ANSWER-main glucocorticoids secreted BY adrenal cortex HPA controls cortisol secretion increases with stress Controlled by release ofACTH .cortisol functions - ANSWER-blood sugar, metabolism, immune response(cytokine release), anti-inflammatory action(bee stings, poison ivy) .covalent bond - ANSWER-a strong chemical bond resulting from the sharing of a pair of electrons between two atoms .CRH + ACTH - ANSWER-CRH- corticotropin releasing hormone