BIOLOGY Practical 3,7,8,9

Question 1

independent varible

Answer 1

the varible that you change in an experiment

Question 2

dependent varible

Answer 2

the varible that you measure as you collect results

Question 3

osmosis

Answer 3

the net movement of water molecules down the concentration gradient through a particaly permeable membrane

Question 4

diffusion

Answer 4

net movement of particles down the concentration gradient as a result of random movement

Question 5

active transport

Answer 5

movement of molecules from a lower concentration to a higher concentration by using energy

Question 6

xylem

Answer 6

a plant tissue made up of dead, empty cells joined end to end. transports water and mineral ions to help support the plant

Question 7

phloem

Answer 7

a plant tissue made up of living cells joined end to end, transports substances made by the plant like sucrose and amino acids

Question 8

lignin

Answer 8

hard strong waterproof substance forms walls of xylem cells

Question 9

what part does water vapor leave the plant from

Answer 9

Stoma

Question 10

what are the befits of humans having a double circulatory

Answer 10

it pressurizes the blood more than a single circulatory sytem meaning it can travel farther

Question 11

water potential gradient

Answer 11

a difference in water potentail between 2 areas

Question 12

transpiration

Answer 12

loss of water vapor from leaves

Question 13

transpiration pull

Answer 13

a force produced by the loss of water vapor from a leaf,which reduces the pressure at the top of xylem vessels

Question 14

pulmonary veins

Answer 14

the veins that carry oxygenated blood from the lungs to the left atreum of the heart

Question 15

atria

Answer 15

the thin-walled chambers at the top of the heart wich receive blood

Question 16

ventricles

Answer 16

the thick walled chambers at the base of the heart which pump out blood

Question 17

septum

Answer 17

structure that separates left and right side of the heart

Question 18

venae cavae

Answer 18

the large veins bring deoxygenated to the right atrium

Question 19

aorta

Answer 19

the largest artery receives oxygenated blood from the left ventricle and delivers it to the body organs

Question 20

pulmonary arterys

Answer 20

the artery that carries deoxygenated blood from the right ventricle to the lungs

Question 21

what does LORD stand for

Answer 21

left oxygenated right deoxygenated

Question 22

Coronary arteries

Answer 22

vessels that deliver oxygenated blood to the heart muscle

Question 23

artery

Answer 23

thick-walled vessel that takes high pressure blood away from the heart

Question 24

capillary

Answer 24

tiny vessel with walls only one cell thick that takes blood close to body cells

Question 25

vein

Answer 25

thin walled vessel that takes low pressure blood back to heart

Question 26

plasma

Answer 26

liquid part of blood

Question 27

red blood cells

Answer 27

biconcave blood cells with no nucleus which transport oxygen

Question 28

white blood cells

Answer 28

blood cells with a nucleus which help to defend agains t pathogens

Question 29

platelets

Answer 29

tiny cell fragments present in blood which help with clotting

Question 30

phagocytosis

Answer 30

taking bacteria or other small structres into a cells cytoplasim and digesting them with enzimes

Question 31

phagocytes

Answer 31

white blood cells that destroy pathogens by phagocytosis

Question 32

lymphocytes

Answer 32

white blood cells that secrete antibodies