Respiration

Why do living things respire?

To produce energy which is needed to move,grow excrete and reproduce.

Where does aerobic respiration occur?

mitochondria

To use the energy available in food,what must be done first?

the living organisms need to break down the food molecules through the process called oxidation.

What is aerobic respiration?

Aerobic respiration is the oxidation of glucose in the presence of oxygen.

What is anaerobic respiration?

Anaerobic respiration is the oxidation of glucose in the absence of oxygen.

What is at the inner walls of the trachea and bronchi and what is the functions for it?

Gland cells:The gland cells secrete mucus that trap dust particles and bacteria in the air that is channelled to the lungs. Epithelial cells: The epithelial cells have cilia that sweep trapoed particles and bacteria up the bronchi and trachea, to the pharynx.

Where does anaerobic respiration occur.

cytoplasm

What is the formular for aerobic respiration?

glucose + oxygen =water + carbon dioxide + energy

word equation for anaerobic respiration?

glucose>>lactic acid + energy

What is the purpose of the potassium hydroxide?

to remove carbon dioxide from the air

Gas exchange system in humans.Explain the parts.

•The fringe of hair and mucous layer on the walls of the nasal cavity trap dust and foreign particles. •The air is warmed and moistured as it passes through tha nasal passages. • C-shaped rings of cartilage support the trachea. •The keep the lumen of the trachea open.

What happens after we exercise and why?Describe in details.

•The oxygen dept is paid off by rapid breathing in the recovery period after exercise,to break doen the lactic acid build up. •The person will continue to pant to bring more oxygen to provide sufficient oxygen to muscle cells. •Lactic acid is also gradually transported by blood form muscles to liver. •At the liver,oxygen is used to convert lactic acid to energy. •The energy released is used to convert the remaining lactic acis to glucose. •When all the lactic acid has been converted,the oxygen dept is repaid. •Glucose is then transported back to the muscles and the body is now ready for another race. •The glucose can be reused for respiration or stored as glucose in liver and muslce cells.

What happens during exercise and why?Describe in detail.

•When we exercise,our muscles contract vigorously to enable the movememt. •Our respiratory rate and heart rate increases to allow more oxygen to reach the muscles. •If the increased oxygen intake is not enough to meet the oxygen demand,it result in oxygen dept and thus anaerobic respiration occur to provide additional oxygen needed. •Glucose will be broken down into lactic acid. •Anaerobic respiration result in the accumulation of lactic acid in the muscle cells. •Thus causing fatigue and muscular pains.