BIOL-UA 12 Study Guide - Midterm Guide: Apical Ectodermal Ridge, Biocoenosis, Blastocoel
8 Aug 2018
School
Department
Course
Professor
Document Summary
Chapter 42: circulation and gas exchange (lecture 12) + body cells: benefits: high enough blood pressure to effectively deliver o2 and nutrients in larger and more active animals; distribute blood to different organs. Blood pressure: systolic pressure: pressure in arteries during ventricular systole; highest pressure in arteries, diastolic pressure: pressure in arteries during diastole; lower than systolic pressure, pulse: rhythmic bulging of artery walls with each heartbeat. Tracheal systems in insects: tracheal system: network of air tubes that branch throughout the body, tracheae open to outside, supply o2 directly to body cells. Osmoregulation: osmolarity: unit of measurement for solute concentration; number of moles of solute per liter of solution, determines the movement of water across a selectively permeable membrane. Isosmotic: two solutions with the same osmolarity; water molecules cross membrane at equal rates in both directions: hyperosmotic: solution with higher concentration of solutes; hypoosmotic: more dilute solution, water flows from hypoosmotic to hyperosmotic soln.
