Please enable JavaScript.
Coggle requires JavaScript to display documents.
B4- bioenergetics (Aerobic Respiration (takes place in mitochondria (liver…
B4- bioenergetics
-
photosynthesis
-
-
-
factors that can limit the rate of photosynthesis:
-temperature
-light intensity
-carbon dioxide concentration
-color of light/ wave length
good greenhouse conditions:
-paraffin burner: increases temp + CO2 concentration.
-electric lights/ clear panels: light intensity
-constant supply of water.
Anaerobic respiration
-
It is less efficient because it leaves an oxygen debt, fitness level and muscle fatigue
-
-
-
Plants
Plants use glucose for:
-converting into starch (to store)
-for respiration (to grow)
-converting into protein, lipids, sucrose and carbohydrates
-Making cellulose for cell walls
Nitrate ions are absorbed through the roots as mineral ions dissolved in the soils water.
They are needed for making amino acids (making proteins).
Light, chlorophyll and carbon dioxide are essential in making glucose.
-
Tests
Oxygen experiment: You must either elodea/ cabomba in a test tube with a bung and a thermometer in a large beaker full of water. Set up a lamp 100 cm away from the plant and count the number of bubbles produced. Repeat and Decrease the distance the lamp is away by 10 each time.
To test for starch:
-boil leaf for 30 seconds
-heat in boiling ethanol for a few mins.
-wash leaf with water and put on tile.
-add iodine solution with a pipette.
-
-
-
excercise
changes to body:
-heart rate increases.
-breathing rate increases.
-lactic acid build up
-temperature increases
Effects of long periods of exercise:
-build up of lactic acid/ fatigue
-breathlessness
-massive pulse rate increase
-
The increased heart rate allows the lactic acid to be carried away to the liver where it is broken down.
metabolism
-
examples: chemical bonds of reacting molecules are broken. New chemical bonds are made to form products.
-
urea is produced from excess protein and carries nitrogen out of the body. Nitrogen and amino acids are converted to ammonia then converted to urea which is filtered out the body via the bladder.