Topic 2 Flashcards
Diffusion is
The movement of particles from an area of high concentration to an area of low concentration
Describe the process of diffusion in cells
Cells respire and use up glucose and oxygen so concentration in cell decreases
Concentration in blood high do diffuses from capillaries into cells
CO2 concentration higher in cells from respiring
Co2 diffuses into blood where concentration lower
The bigger the difference in concentration
The faster the rate of diffusion
How do raw materials travel around the body for respiration
Circulatory system = glucose O2 and CO2
Glucose form break down foods in digestive system
Oxygen breathed in from lungs
To meet the need of oxygen to get to working muscles more quickly during exercise so that they can contract more frequently the rate of diffusion
Increases
After anerobic exercise oxygen dept causes EPOC what is this
Excess post-exercise oxygen consumption
Toxic lactic acid needs to be converted into
O2+ H2O
Three factors of a plant leaf that are adapted to photosynthesis
BROAD
CONTAIN CHLOROPHYLL in chloroplast
HOLES-STOMATA
What is the job of the stomata
Open and close to let gas CO2 in and O2 out
Allow water vapour to escape-transpiration
Name three limiting factors of photosynthesis
Light intensity
CO2 concentration
Temperature
Osmosis is
The movement of particles across a partially permeable me brain from a region of high concentration to a region of low concentration
What is steady net flow
During osmosis when molecules move across area of high to low concentration
Plants root hair cells take in water through
Osmosis
Root hair cells take in minerals through
Active transport
Where does the energy in root hair cells come from for active transport
Photosynthesis
