B4 Respiration Flashcards
Name 2 chemicals needed for aerobic respiration.
Glucose and oxygen
Why do all cells need to respire?
Release energy.
How are chemical reactions controlled in cells?
Enzymes
In which part of a cell does aerobic respiration take place?
Mitochondria
Is respriation an endothermic reaction or exothermic rection?
Exothermic (energy is released)
Which of the following statements is correct?
Respiration takes place in animals only.
Respiration takes place in plants only.
Respiration takes place in plants and animals
Respiration takes place in all plant and animal cells
The word equation for aerobic respiration is:
Glucose + oxygen –> Carbon dioxide + water + energy
Name the two chemicals made during respiration.
Carbon dioxide and water
What do animals use the energy released in respiration for?
Build large molecules from small molecules.
Muscle contraction
Maintain a constant body temperature (birds and mammals).
Active transport
What happens to the heart rate when a person exercises?
Heart rate increases.
What happens to your breathing when you exercise?
Breathing rate increases.
Depth of breathing increases.
Why does breathing and heart rate increase when you exercise?
Increase the amount of oxygen (and glucose) delivered to the muscles for aerobic respiration.
Allows a greater rate of respiration
Increases the amount of energy available for muscle contraction
Which type of respiration happens when there is
insufficient oxygen reaching the muscles?
Anaerobic respiration
Name the chemical formed in anaerobic respiration in human cells.
Lactic acid
Which type of respiration releases the most energy?
Aerobic respiration.