Unit 3 Bio Test

Created by mfisher13 

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37 terms

hypotonic

water is always

phospholipids

main molecule in cell membranes

lipid bilayer

cell boundary made of 2 layers of lipid cells surrounds cell as membrane structure

polar

membrane head

nonpolar

membrane tails

hydrophobic

nonpolar

hydrophilic

polar

solvent

dissolver

solute

dissolved substance

concentration gradient

when you go from high to low

diffuse across cell membrane

water and small lipids can...

selective permeability

when a cell membrane only lets some molecules into the cell

vesicles

bubbles around certain substances that move things in and out of the cells in endo/exocytosis

pulmonary circulation

pumping blood to lungs

systemic circulation

pumping blood to body

artery

blood vessel brings blood away from the heart, most muscular

vein

blood vessel brings blood towards the heart

valves

keep blood from flowing backwards into atria

capillaries

smallest blood vessel, brings nutrients and oxygen to tissues, absorbs carbon dioxide and waste products, in the kidney: reabsorb needed nutrients and secret waste materials

atrium

upper muscular chamber of the heart, receives and holds blood that is about to enter the ventricle

ventricle

pumps oxygenated blood to aorta, and deoxygenated blood to pulmonary arteries to go to lungs (more muscular than atria)

plasma

straw colored fluid, makes up 55% of blood, made of water, nutrients, enzymes, hormones, and proteins

hemoglobin

protein in red blood cells that transports oxygen from lungs to body tissues

red blood cells

blood cell that contains protein hemoglobin which transports oxygen

white blood cells

blood cell that fights off foreign substances in the body

platelets

cell fragment released by bone marrow that helps blood clot

respiratory system

to exchange oxygen and carbon dioxide

nasal cavity

?

trachea

windpipe, tube which air moves through

larynx

also called the vocal cords, 2 elastic folds of tissue when pull the air going between them make vibrations that create sounds

alveoli

tiny air sacs that are connected to the end of bronchioles that provide surface area for gas exchange

lungs

air chambers that take in and push out air with the diaphragm that contain bronchioles

diaphragm muscle

muscle under the lungs, when it contracts down air goes in and pushes air out when it contracts up

bronchi

2 large chest cavities that air pass through before the bronchioles

circulatory system

to transport oxygen and glucose throughout the body

kidney

main organ in excretory system

nephrons

tubes in the kidney that filter the blood

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