BIOL 348 EXAM 1 SET 4 QUESTIONS AND 100% APPROVED CORRECT ANSWERS GRADED A+ 2025 FIRST CLASS PASS

BIOL 348 EXAM 1 SET 4 QUESTIONS AND 100% APPROVED CORRECT ANSWERS GRADED A+ 2025 FIRST CLASS PASS 2025 EXAM  BIOL 348 EXAM 1 SET 4 QUESTIONS AND 100% APPROVED CORRECT ANSWERS GRADED A+ 2025 FIRST CLASS PASS Anatomy - CORRECT ANSWERstudies the structure of the different parts of the body and their interrelationship at different levels of organization Physiology - CORRECT ANSWERstudies how diverse and indispensable body functions are performed by the interaction of different body structures Boundary organs - CORRECT ANSWERInternal & External environment must remain distinct. Boundary organs control extracellular fluid composition. They exchange materials into and out of the body. (digestive, urinary, reproductive, respiratory systems) Living things - CORRECT ANSWER•composed of a single cell or a group of cells •AT LEAST physical and chemical machines •respond to short term changes in their environment •grow and reproduce •adapt to long term changes in their environment through natural selection Homeostasis - CORRECT ANSWERA tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level Intracellular fluid (ICF) - CORRECT ANSWERfluid within cells (67% of fluid in body) Extracellular fluid - CORRECT ANSWERfluid outside cells intercellular fluid=tissue fluid=interstitial fluid plasma=fluid portion of blood, part of ECF (33%) Separation of fluid compartments - CORRECT ANSWERICF and ECF homeostasis of body fluids composition of fluid changes as substances move between compartments -small nutrients, oxygen, ions and wastes move in both directions across capillary walls Components of a feedback loop - CORRECT ANSWERreceptor: -monitors a controlled condition control center: -determines next action effector: -receives directions from the control center -produces a response that changes the controlled condition Negative feedback - CORRECT ANSWERMore common A primary mechanism of homeostasis, whereby a change in a physiological variable that is being monitored triggers a response that counteracts the initial fluctuation. (i.e. regulation of body temp, blood pressure) Positive feedback - CORRECT ANSWERFeedback that tends to magnify a process or increase its output. (i.e. childbirth, formation of platelet plug) Plasma membrane - CORRECT ANSWER•Extra and intracellular compartments •Control communication and transport •Preserve different composition Functions of membrane proteins - CORRECT ANSWERformation of channel -passage to allow specific substances to pass through transporter proteins -bind to a specific substance, change their shape & move it across membrane receptor proteins -cellular recognition site: bind to substance simple diffusion - CORRECT ANSWER*passive transport* simple diffusion of fat-soluble molecules through the phospholipid bilayer down their concentration gradient osmosis - CORRECT ANSWER*passive transport* diffusion of water through the lipid bilayer facilitated diffusion - CORRECT ANSWERprotein that spans the plasma membrane enables the passage of a particular solute across the membrane active transport - CORRECT ANSWEREnergy-requiring process that moves material across a cell membrane against a concentration difference Antiporters - CORRECT ANSWERmove two molecules in opposite directions Symporters - CORRECT ANSWERmove two molecules in the same direction facilitated diffusion of glucose - CORRECT ANSWERin 2_cellbio ppt pg 10 What solutes are distributed differently across the cell membrane? - CORRECT ANSWERCO2, ions, proteins and phosphates Cytoskeletal filaments - CORRECT ANSWER2_cellbio ppt pg 13