Bioenergetics Paper 1 Flashcards
What is the word equation for photosynthesis
Carbon dioxide+water ->glucose+oxygen
What are the 5 main ways plants use glucose
For respiration, making cellulose, making amino acids, stored as oils or fats, stored as starch
What is the word equation for aerobic respiration
Glucose+oxygen->carbon dioxide+water (+energy)
Explain what oxygen debt is
The amount of extra oxygen your body needs to react with the build up of lactic acid and remove it from your cells
What causes muscle fatigue
Long periods of exercise
Build up of lactic acid
What affects the rate of photosynthesis
Light intensity, temperature, concentration of Co2, amount of chlorophyll
What is the word equation for anaerobic respiration in muscle cells?
Glucose ——->lactic acid (+energy)
What is the word equation for anaerobic respiration in plant and yeast cells
Glucose —> ethanol + carbon dioxide
Is photosynthesis an endothermic or exothermic reaction
Endothermic as it takes in light energy
What is metabolism
The sum of the chemical reactions in the body
Is respiration exothermic or endothermic
It is exothermic as it releases energy
What is respiration
A process which occurs in every cell converting oxygen and glucose into water, carbon dioxide and energy
What causes muscle fatigue
Long periods of exercise
What are the ways animals use the energy transferred by respiration
Build up larger molecules from smaller ones, to contract muscles, to keep body temperature steady
What is the inverse square law?
Light intensity = 1 / distance²
