1.1 Respiration and Gas Exchange in Plants Flashcards
process in which energy from organic molecules are released to be used in different life processes in an organism
respiration
refers to breakdown of carbohydrates in cells
carb+O2 -> CO2+H2O+energy
respiration
gases are exchanged in the air by animals
breathing
why is respiration in plants not very obvious?
photosynthetic process makes more oxygen than he respiratory process needs
the no. of carbon dioxide in photosynthesis is _____ than what is given off during respiration
higher
what happens in respiration at night?
oxygen is taken in and carbon dioxide is realeased
why is respiration is higher at night?
light is absent
what is the difference of respiration from breathing
- respiration is a chemical process, while breathing is a physical process
- respiration involves taking oxygen from lungs into the blood stream and cells while breathing involves taking oxygen into lungs
why do plants not need respiratory organs?
oxygen requirements are met by photosynthesis
where does photosynthesis occur?
chloroplasts
what happens when oxygen is directly released into plant cells
minimal gas transport from one plant to another occurs
how does gas exchange occur in small plants
by diffusion
why can gas exchange in plants occur through diffusion?
because leaves and other structures are very thin
how does gas exchange occur in complex plants?
through stomata and lenticels
where does the oxygen that roots absorb come from?
from the air spaces in the soil