Unit 11 Flashcards
Where humidity is high…
Water loss is not a problem and plants have many stomata
If there is a normal level of carbon dioxide…
The stomata is less stressed
Mesophyll
Specialized ground tissue inside a leaf, made up of thin walled cells containing chlroplasts
Palisade tissue cells
Column-shaped mesophyll cells in a plant leaf; responsible for photosynthesis
Spongy mesophyll
Layer of loosely-spaced mesophyll cells in a leaf; the increase distance between cells promotes diffusion
The mesophyll cells will move…
Oxygen toward the stomata
The vascular tissue provides the leaf with…
Water needed for transportation and for photosynthesis
Vascular bundle
Strand of xylem, phloem, and associated tissues in a plant
The phloem transports the sugar manufactured in…
Photosynthesis to the rest of the plant
The vascular bundles branches into…
Finer veins within the spongy mesophyll
Gas exchange in plants…
Occurs by diffusion
No organs specifically concerned with…
Gas exchange
Diffusion of gases occur through…
Air spaces and then across cell membranes
In the leaf, the stomata regulated by…
Guard cells allow for more efficient intake of gases and therefore for more rapid diffusion
Lenticels
A raised spongy region in the stem of a woody plant that allows gas exchange between the atmosphere and the interior of the plant
Cohesion
Tendency of molecules of the same kind stick together
Adhesion
Tendency of unlike unlike molecules to stick together
Root pressure
Upward force extend on water on the xylem in the roots of some plants
Dissolved minerals are…
Present in the cells of the root as a result of active transport, producing higher concentration
The process of osmosis is…
Drawn into the cell creating pressure that forces fluid up the xylem
Overall processes of water is affected by…
Transipiration
Substances must be dissolved in a…
Film of water to be transported in plants.
Differences in pressure is caused by…
Osmosis and transipiration
Root hairs absorb…
Minerals from the soil through active transport
