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An epidermal dendritic cell is a specialized?
type of immune cell found in the skin that plays a key role in initiating immune responses against pathogens. These cells are responsible for capturing antigens in the skin and presenting them to other immune cells to trigger an immune response. Epidermal dendritic cells are important in the defense against infections and maintaining skin immunity.
How does stomata open?
The stomata's function is to allow gas exchange with the surrounding air, so that the plant can intake carbon dioxide and oxygen. Stomatal opening is favored when there is plentiful water and moderate temperatures. Abscissic acid, a plant hormone, acts on the guard cells to open and close stomata. Some plants are even genetically engineered with a mutated era gene, which makes them more sensitive to abscissic acid and more prone to the opening and closing of guard cells. When guard cells are full of water, they stretch away from each other and the stomata are open. When guard cells are limp, they fall on each other and the stomata are closed. Potassium ions play a role in the opening and closing of stomata by changing the concentration of ions in the guard cells. When the potassium ions are in the guard cells, water also flows in the guard cells because of osmosis and the stomata open. When the potassium ions are out of the guard cells, water also flows out of the guard cells because of osmosis and the stomata close.
How does the structure of an onion skin cell differ from other plant cells?
The structure of an onion skin cell differs from other plant cells in that it lacks chloroplasts, which are responsible for photosynthesis. Onion skin cells also have a unique rectangular shape and a thin cell wall compared to other plant cells.
What mechanism causes the stoma to open when the guard cells are on good conditions?
when water flows the guard cells swell up and open and when the guard cells shrink the stomatal pore closes. During sunlight hours, K+ (potassium) ions enter the guard cells, causing a drop in their water potential. Sugar produced via photosynthesis also decreases water potential. Water is then taken in through osmosis. Guard cells swell up and become turgid - stomas open. At night, K+ ions leave the guard cells, causing an increase in water potential. Water leaves the plant. Guard cells then become flaccid, straighten up and the stoma closes. This way, the amount of water escaping from the leaf is controlled.
What are epidermal derivatives?
Epidermal derivatives are structures that develop from the epidermal layer of the skin. Examples include hair, nails, and glands (such as sweat glands and oil glands). These structures serve various functions, such as protection, thermoregulation, and sensory perception.
What can guard cells do that other epidermal cells cant?
they can save other chloraplasm
What is the difference between a guard cell and other cells?
Answer1. Guard cells have chloroplast, epidermal cells do not have.2. Guard cells are much smaller than the epidermal cells.3. The cell walls of guard cells are not uniform, inner walls are thicker than the outer walls. epidermal cells are unformly thin.
What organelles do the guard cells contain that the surrounding epidermal cells do not?
Guard cells contain specialized organelles called chloroplasts, which are responsible for photosynthesis. These chloroplasts enable guard cells to produce sugars and other molecules needed for energy. The surrounding epidermal cells, on the other hand, do not typically contain chloroplasts as they are not directly involved in photosynthesis.
What causes the shape of a human cheek cell to be different from the shape of onion's epidermal cell?
The shape of a human cheek cell is influenced by its function and structure in the body, which includes maintaining tissue structure and facilitating absorption. Onion epidermal cells, on the other hand, are specialized for protection and support, resulting in a different shape and structure to serve their purpose in the plant. This difference in function leads to the variation in cell shape between the two organisms.
Which type of dermal cell has more chloroplasts than any other dermal cells because it has greater energy needs?
Guard cells have more chloroplasts than any other dermal cells because they need energy to facilitate the opening and closing of stomata for gas exchange and water regulation in plants.
Comparison between epidermal tissue of plants and epithelial tissue of animals?
Epidermal tissues in plants includes several differentiated cell types. They are epidermal cells, guard cells, subsidiary cells, and epidermal hair. Many plants have waxy cuticle layer deposited on top of the epidermal cells. Epithelial tissues consist of epithelial cells which form continuous sheets that are attached to each other at many locations by tight junctions and desmosomes. Both plant epidermal tissues and animal epithelial tissues form the most numerous and largest tissues for their specific organisms. Both plant epidermal tissues and animal epithelial tissues also are very densely packed together, leaving very little intercellular space. The plant epidermal tissues functions in prevention of water loss and act as a barrier to fungi and other invaders. It also regulates gas exchange in plants and absorb water and minerals nutrients(especially in roots) The epithelial tissues not only covers the external environment of plant from the external environment but also lines the surfaces of internal organs of an organisms, unlike the plant epidermal tissues that only act as barrier between external environment and external environment.Functions of epithelial tissue includes secretion, selective absorption, protection. transcellular transport and detection of sensation. Other than that, both of the structure act mainly as protective barrier between the internal environment of living thins and the external environment.
Epidermal cells are supplied with nutrients from what blood cells?
Cells in the blood do not provide nutrients to the other cells of the body. The nutrients are in the blood plasma (liquid). These nutrient diffuse through the vessel wall and travel to the bodies cells in the interstitial fluid (the fluid around individual cells). The epidermis does not have blood vessel running through it, so the nutrient must pass from the dermis layer of cells.
What will an epidermis cell look like?
If it is a upper epidermal cell then it will looktransparentclose fittingrectangulara horizontal shapeThe upper epidermal cells are transparent and close fitting, containing no chloroplasts, which are present in other leaf cells. They allow light to pass straight through them. The epidermis is covered by a waterproof cuticle, which reduces water loss from the leaf, since it is a waxy substance.If it is a lower epidermis cell then it will look like cells covered in tiny pores (holes)The lower epidermis has tiny pores (holes)in it's surface called stomata.These are very important for the leaf to exchange gases with the air. The stomata pores can be opened or closed by special cells on either side of the pore called guard cells. thes sausage shaped ceel are green and are thae only epidermal cells to contain chloroplasts
Where does the cuticle of a plant come from?
The cuticle of a plant is derived from the epidermal cells of the plant. It is a waxy layer that covers the outer surface of leaves and stems to protect the plant from water loss and other environmental stresses.
Which epidermal cells contain kerathyaline and lamellated granules?
Stratum granulosum Once again, stratum granulosum is one of epidermal layers: not epidermal cells. My answer to this question is: Flattened cells of stratum granulosum that are going through keratinization process contain kerathyaline and lamellated granules.
An epidermal dendritic cell is a specialized?
type of immune cell found in the skin that plays a key role in initiating immune responses against pathogens. These cells are responsible for capturing antigens in the skin and presenting them to other immune cells to trigger an immune response. Epidermal dendritic cells are important in the defense against infections and maintaining skin immunity.
What abnormality does histiocytosis X involve?
Epidermal (skin) Langerhans cells (a form of dendritic cell) accumulate with other immune cells in various parts of the body and cause damage by the release of chemicals.
