Biology B2 Palisade Mesophyll cells - Structure and Function Flashcards
what are Palisade mesophyll cells ?
They are plant cells.
where are Palisade Mesophyll cells found ?
They are found in the leaf , under the waxy cuticle and upper epidermis.
where is the position of the palisade cells ?
Palisade cells sit at right angles to the upper epidermis , close to the surface of the leaf , but close to the spongy layer
They have long narrow spaces between them for air to circulate for gas exchange.
description of Palisade mesophyll cells
They have a long cylindrical shape so they can be closely packed together. This is to maximise the amount of light that is absorbed by the chloroplasts by providing a continuous layer for photosynthesis.
what is the function of palisade cells ?
The function of photosynthesis in the palisade cells is to capture the energy from sunlight and convert it into chemical energy in the form of glucose molecules using carbon dioxide and water as raw materials.
what is the cell membrane and nucleus structure in the palisade cell ?
The nucleus contains the genetic material and controls the activities of the cell.
The cell membrane controls what enters and leaves the cell.
what is the structure of the cell wall in palisade mesophyll cells ?
The cell wall of the palisade cell is thin and transparent to allow easy gas diffusion and to keep the pathway clear for light energy to hit the chloroplasts.
what is the structure of chloroplasts in the palisade mesophyll cell ?
Chloroplasts are large in number so that lots of photosynthesis can take place . They can move within the cell using the cytoskeleton so more will migrate towards the surface of the leeaf during dull weather but move away to avoid damage if the sun is bright.
what is the structure of the vacuole in the Palisade mesophyll cells ?
The vacuole is large . The vacuole helps keep the cell rigid by maintaining turgor pressure so the leaf remains at the optimal position in relation to the sun. It also pushes the chloroplasts closer to the edges of the cell to be in position to absorb more sunlight.
what is the structure of the cytoplasm in the palisade mesophyll cells ?
It is the cytoskeleton that moves the chloroplasts around the cytoplasm in order to maintain photosynthesis in low light and protect chloroplasts in intense light.
what is the cytoskeleton made of ?
It is made of microfilaments, proteins and microtubules.
