biology

Topics: Oxygen, Carbon dioxide, Photosynthesis, Cellular respiration, Water, Osmosis / Pages: 5 (782 words) / Published: Jun 30th, 2014
Aerobic Respiration

Breaking down glucose to release energy Products are Carbon dioxide and water Diffusion is … the movement of molecules from a region of high concentration to a low concentration until the concentration is equal.

Role of a human circulatory system:
Diffuse In – oxygen (O2), dissolved food (glucose) and water (H2O)
Diffuse Out – carbon dioxide (CO2),waste and water(H2O)

Respiration – releasing energy in cells
Breathing – getting air into and out of your body

Exercise

When you exercise your heart rate and breathing rate increases Heart rate measured – beats per min. Breathing rate – counting the number of breaths in a min.

Muscle cells respire faster. Meaning- they need more oxygen and glucose and release more carbon dioxide.
A faster breathing rate means that oxygen can be taken into the body at a faster rate and carbon dioxide can be released faster.

Cardiac output = stroke volume x heart rate

Effects of exercise:

Ventilation – breathing Respire – release of energy from food/chemicals

Anaerobic respiration

… is release of glucose without using oxygen. This produces lactic acid. glucose = lactic acid + energy Advantage: useful for muscles because it can release energy to allow muscles to contract when the heart/lungs can't deliver (O2) and glucose fast enough for aerobic respiration.
Disadvantages: Lactic acid is not removed from the body. It builds up in the body and the blood.
(2) – Anaerobic respiration releases less energy than aerobic respiration.

Lactic acid: poisonous causes cramp causes oxygen debt
EPOC = excess post oxygen consumption means if someone exercises hard you will see their breathing and heart rate will take time to return to a normal resting rate.
Photosynthesis ….. is the process where plants use to make glucose.

In this process light energy used to combine with carbon dioxide and water .

Word equation= carbon dioxide + water =

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