Human Bio

Diffusion- cause of molecules or ions from part of high ingress to neighborhood of lower niggardness Osmosis- diffusion (passive transport) of water across a selectively permeable membrane Passive transport- diffusion of a cognitive content across a jail cellphone membrane; does not dominate adenosine triphosphate heftiness Active transport- movement of substances across a cell membrane against a concentration gradient, using energy from ATP TissuesChap. 4 Epithelium- a stratified tissue that has one free excavate exposed to remains fluids; covers body surfaces. Epithelia line body cavities, ducts, and tubes. connectedness tissue provides arrest and protection for cells, tissues, and organs Muscle tissue- tissue reinforced of cells that faecal matter contract Nervous tissue- made up of neurons and glial cells organ System: integument= spit out, oil and sweat glands, hair, nails Epi derma (top layer) ? dermis ? hypodermis Keratin- makes s kins outer layer tough and seal reach Melanocytes- pigment, give skin color BASIC CHEMISTRY (Chap.

2) nuclear mass # = protons + neutrons Atomic # = protons Radioisotopes- isotope with an unstable nucleus that becomes stable by emitting energy and particles (radioactive decay) (isotope = dif # neutrons) Uses: determine age of rocks/ fossils, PET scans to diagnose disease, disciple treat cancers Covalent bond- atoms share 2 electrons (H2) Ionic bond- 2 ions that have opposite charges; formed by transfer of electrons (NaCl) enthalpy bond- weak attraction betwe en a covalently bound atomic number 1 atom! and an electronegative atom in the same or different molecule pH prise of hydrogen ion concentration; < 7 = acid > 7 = elementary Major innate Biological Molecules (compounds are characterized by C atoms arranged in chains or rings) Carbohydrates: glucose (energy), sucrose (sugar from plants), starch/glycogen (energy storage), cellulose (structural roles) Lipids: Glycerides ? Fats ? energy storage;...If you want to get a full essay, do it on our website: OrderCustomPaper.com

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