Organisation - Tissues, Organs And Organ Systems Flashcards

Question

what is the product when oxygen and haemoglobin combines

Answer 1

oxyhaemoglobin

Answer 2

engulf produce antibodies produce antitoxins

Answer 3

fragments of cells that have no nucleus that help the blood to clot at a wound to stop you losing too much blood and stops microorganisms from getting in

Answer 4

covers the whole plant and covered with a waxy cuticle to stop water loss where most photosynthesis takes place so lots of chloroplasts and near top of leaf

Answer 5

has big air spaces to allow gases to diffuse

Answer 6

transparent so light can pass through

Answer 7

found at growing tips of shoots and roots and is able to change into lots of different types of plant cells, allowing the pant to grow

Answer 8

let co2 diffuse directly into the leaf and controlled by guard cells.

Answer 9

columns of elongated living cells with pores in the end walls to allow cell sap to flow through phloem tubes transport food from the leaves to the rest of the plant for immediate use or for storage the process goes in both directions and is called translocation

Answer 10

dead cells joined end to end with no end walls between them. strengthened with a material called lignin carry water and mineral ions up the plant. this is called the transpiration stream

Answer 11

loss of water from a plant

Answer 12

water inside leaf evaporates and diffuse through the stomata this creates slight shortage of water in leaf so more water is draw up from the rest of the plant through xylem vessels this in turn means more water is drawn up from the roots

Answer 13

increases rate. stomata close as its gets darker as photosynthesis cant happen in the dark. When stomata are closed, little water can escape.

Answer 14

higher temperature increases rate as water particles have more energy to evaporate and diffuse out of stomata

Answer 15

increased air flow means an increased rate of transpiration. if there is bad air flow the water vapour that surrounds a leaf doesn't go away so their is a high concentration of water particles outside the leaf which decreases diffusion.

Answer 16

the less humid the faster the rate because it creates a larger concentration gradient for diffusion

Answer 17

stick plant poking out boiling tube with water attached through a capillary tube into a beaker. measure how far the air bubbles moves through the capillary tube per unit of time. change variables such as light intensity and air flow and

Answer 18

two guard cells surround each stomata. when plant has lots of water the guard cells goes turgid into a kidney shape so the stomata is open for gaseous exchange needed for photosynthesis. when plant is short of water, guard cell goes flaccid and stomata shuts.

Answer 19

thin outer walls and thick inner walls sensitive to light so close at night more on underside of leaf because its shaded so less water will be lost

Answer 20

epidermal tissue on slide w drop of water. estimate total number of stomata under microscope using a sample And calculating a mean. compare distribution on different areas of the leaf.