AS _1_

Question 1

Magnification

Answer 1

the degree to which the size of of an image is larger than the object itself

Question 2

Resolution

Answer 2

the degree to which it is possible to distinguish between two objects that are very close together

Question 3

Actual (size) - Equation - (metres or any other)

Answer 3

= Image(drawing or picture)-(m) / Magnification (xNumber)

Question 4

Magnification - eq

Answer 4

= Image / Actual (size) -Whats the units

Question 5

Metre > Micrometre - (um)

Answer 5

x10^6

um to m = x10^-6

Question 6

Metre > Nanometre (nm)

Answer 6

x10^9

nm to m = x10^-9

Question 7

(m) > (cm)

Answer 7

x10^2

Question 8

(m) > (mm)

Answer 8

x10^3

Question 9

(mm) > (m)

Answer 9

x10-3

Question 10

(cm) > (m)

Answer 10

x10-2

Question 11

Cytoskeleton

Answer 11

the network of protein fibres within cells that give structure and shape to the cell, and moves organelles around inside the cells

Question 12

DO p12 - One side structure / otherside Functions of all things

Answer 12

pop

Question 13

Organelle

Answer 13

a structure of a cell that has a specialised function

Question 14

Phospholipid bilayer

Answer 14

the basic structural component of plasma membranes

Question 15

Fluid mosaic

Answer 15

the model of a cell membrane structure.

the lipid molecules give fluidity and proteins in the membrane give it a mosaic appearance. the molecules can move about

Question 16

Cell signalling

Answer 16

cells communicate with one another by signals.

Many molecules act as signals - some signals during processes taking place inside cells; others signal from one cell to the others. Cytokines are an example of cell signals

Question 17

Diffusion

Answer 17

the movement of molecules from a region of high concentration of that molecule to a region of lower concentration of that molecule down a concentration gradient

Question 18

Active transport

Answer 18

the movement of molecules or ions across membranes, which uses ATP to drive protein “pumps” within the membrane

Question 19

Solute

Answer 19

a solid that dissolves in a liquid

Question 20

Solvent

Answer 20

a liquid that dissolves solids

Question 21

Solution

Answer 21

a liquid containing dissolved solids

Question 22

Cell cycle (what does it describe)

Answer 22

the events that take place as one parent cell divides to produce two new daughter cells which then each grow to full size

Question 23

Mitosis

Answer 23

the process of nuclear division where two genetically identical nuclei are formed from one parent cell nucleus

Question 24

Clones

Answer 24

“two” genetically identically cells or organisms derived from one parent

Question 25

Differentiation (how the cell becomes different)

Answer 25

the changes occurring in cells of a multicellular organism, so that each different type of cell becomes specialised to perform a specific function

Question 26

Tissue

Answer 26

a collection of similar cells that carry out a specific functixcon

Question 27

Organ

Answer 27

a collection of tissues that work together to carry out a specific function

Question 28

exchange Surface

Answer 28

a specialised area that is adapted to make it easier for molecules to cross from one side of the surface to the other

Question 29

Gaseous Exchange

Answer 29

the movement of gases by diffusion between an organism and its environment across a barrier such as the alveolus wall

Question 30

Transport (what is it?)

Answer 30

the movement of oxygen nutrients, hormones, waste and heat around the body

Question 31

Heart

Answer 31

a muscular pump that creates pressure to propel the blood through arteries and around the body

Question 32

Myogenic

Answer 32

A muscle tissue that generates its own contractions

Question 33

Cardiac cycle

Answer 33

the sequence of events in one heartbeat

Question 34

SAN

Answer 34

SinoAtrial Node the hearts pacemaker - a small patch of tissue that sends out waves of electrical excitation at regular intervals to initiates contractions

Question 35

Purkyne tissue

Answer 35

specially adapted muscle fibres that conduct the wave of excitation from the AVN down the septum to the Ventricles

Question 36

AVN

Answer 36

AtrioVentricular Node

Question 37

Open circulatory system

Answer 37

the blood is not always in vessels

Question 38

Closed circulatory system

Answer 38

the blood always remains within vessels

Question 39

DO EQUATIONS OF CO2 and BLOOD - Carbonic Acid Oxyhaemoglobin

Answer 39

pop

Question 40

Xylem

Answer 40

Transports water up the plant Carries water from the roots to the rest of the plant Hollow columns of dead cells lined end to end and reinforced with lignin. it provides important supports for the plant

Question 41

Phloem

Answer 41

Transports sugars and other assimilates up and down the plant Consists of sieve tube elements and companion cells

Question 42

Water Potential

Answer 42

the total potential energy of the water molecules in system Need better Define

Question 43

Plasmodesma

Answer 43

a fine strand of cytoplasm that links the contents of adjacent cells

Question 44

Cohesion

Answer 44

the attraction of water molecules for one another

Question 45

Adhesion

Answer 45

the attraction of water molecules to the wall s of the xylem

Question 46

Symplast pathway

Answer 46

moves water through the cell cytoplasm

Question 47

Appoplast pathway

Answer 47

moves the water in the cell walls between the cells

Question 48

Transpiration

Answer 48

the loss of water by evaporation from the aerial parts of a plant

Question 49

Xerophyte

Answer 49

a plant that is adapted to reduce water loss so that it can survive in very dry conditions

Question 50

Translocation

Answer 50

the transports of assimilates throughout the plant, in the phloem tissue

Question 51

Source (Start)

Answer 51

Releases sucrose into the phloem

Question 52

Sink (End)

Answer 52

Removes sucrose from the phloem