Epithelial cells best suited for resisting abrasion and preventing pathogen entry into deeper tissues are stratified squamous epithelial cells.
Stratified cells are layered cells, squamous cells are flat and epithelial cells are covering cells. Therefore, stratified squamous epithelial cells are flattened, layered covering cells arranged on a basement membrane.
Stratified squamous epithelial cells have very little to no intercellular spaces which prevent pathogen from passing through and entering into the deeper tissues. They are well suited for resisting abrasion because the uppermost layers are subsequently sloughed off and replaced before the basement membrane is exposed. These types of cells form the outermost layer of the skin.
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Answer:
Ở đậu Hà Lan, A- thân cao, a-thân thấp. Cây thân cao giao phấn với cây thân cao — F1 có tỷ lệ 900 thân ca0:299 thân thấp — tỷ lệ 3:1 — cây thân cao có kiểu gen dị hợp Aa. Tỷ lệ F1 tự thụ phấn cho cho F2 toàn cây thân cao → F1 đồng hợp AA → chiếm 1 phần 4
P: Aa x Aa → 1 phần 4 AA: 2 phần 4 Aa: 1 phần 4 aa
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Answer:
Yes, tests like urine and blood tests.
Explanation:
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Consuming high levels of pro vitamin A carotenoid, which come from plant sources, does not lead to vitamin A toxicity. This statement is true.
Vitamin A is obtained mainly from the food products we eat, but it is also synthesized in our body via pro vitamin A carotenoids like beta-carotene. When high amounts of pro vitamin A carotene are consumed in the diet of a person they are converted very slowly and naturally in our body into vitamin A in the intestine.
Vitamin A has many benefits including defense from pathogens, strengthening immune system, improving vision, and also improving overall growth and development of the body etc.
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