7.4 Gas exchange in plants and animals Flashcards
(17 cards)
What’s the net uptakes and release of plants in the morning?
Net uptake of carbon dioxide, net release of oxygen.
What’s the net uptakes and release of plants at night?
Net uptake of oxygen, net release of carbon dioxide.
Gas exchange in plants is carried out through what?
Stomata (Stoma: Singular).
What’s stoma surrounded by?
Two guard cells.
What happens to the stoma in the daytime? (Guard cells, stoma)
The guard cells are full of water. They open the stoma.
What happens to the stoma at night? (Guard cells, stoma)
The guard cells shrink as they lose water, so the stoma closes.
Compare the 4 states of inhaled and exhaled air.
(In Gallery)
Gallery: Human Body Breathing System
(In Gallery)
Air sacs are surrounded by what?
Capillaries.
Where does gas exchange takes place in human?
Air sacs.
What passes from the air sacs into blood?
Oxygen.
What passes from the blood into the air sacs?
Carbon dioxide.
What type of cells line in a healthy airway?
Mucus-secreting cells and ciliated cells.
What’s the use of mucus-secreting cells?
Produce mucus.
What’s the use of mucus?
Mucus traps dust particles and bacteria from entering the breathing system.
What does ciliated cells have on their surfaces?
Cilia (Singular: Cilium)
What’s the use of cilia?
Cilia sweep out the mucus.
