B2.2 Organisms and energy
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What does anaerobic mean?
Give the equation for respiration.
Glucose + Oxygen --> Carbon Dioxide + Water (+ Energy)
Name the process which is a chemical reaction that uses glucose to release energy and occurs within the cells of all living things.
What is diffusion?
Diffusion is the movement of particles from an area of a high concentration to an area with a low concentration.
Give the equation for Cardiac Output.
Cardiac Output = Heart Rate x Stroke Volume
Why do muscles need energy?
For muscle contraction
When you exercise what changes occur?
- Increased heart rate
- Increased breathing rate
Give the equation for anaerobic respiration.
Glucose --> Lactic Acid (+ energy)
Which type of respiration is the most efficient?
Aerobic respiration is the most efficient and produces the most energy.
Whats the name given to the amount of oxygen required to repay the oxygen debt from exercise?
Excess Post-exercise Oxygen Consumption (EPOC).
Name the product of anaerobic respiration which produces cramp.
Name the process by which plants produce their own food.
Give the equation for photosynthesis.
Carbon Dioxide + Water --> Glucose + Oxygen
Sunlight and chlorophyl are also needed to the reaction to occur.
What is the role of chlorophyl?
Chlorophyl is the green pigment inside chloroplast which absorb sunlight. It is needed for photosynthesis to occur.
How are leaves adapted for photosynthesis?
- Large flat surface - Large surface area
- Lots of chlorophyl - to absorb light
- Have stomata - which open and close to let CO2 in and O2 out.
Give 3 limiting factors of photosyntheis.
- Carbon Dioxide
What process involves the movement of water.
What is a partially permeable membrane?
A membrane with small hole in it that allow small molecules like water to pass through.
What is the role of a root hair cell? How is it adapted to its function?
Its role is to absorb water by osmosis and minerals by active transport.
It has a large surface area for absorption.
What is transpiration?
Water loss from plants -due to water evaporating from the leaves.
Name the type of vessel in a plant that transports water and minerals.
Name two methods which could be used to sample insects.
Name 3 environmental factors that might affect the distribution of organisms.
What kind of sampling would you use to see how the distribution of an organism changes over an area.
What would you like to do?
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