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Answer:
Iodine is a mineral which is present in the food such as diary products, sea foods, fruits, vegetables, and iodized salts. Body needs iodine to synthesize thyroid hormones, and these hormones helping in the control body metabolism, and other functions. Thyroid hormone is also playing an important role in brain, and bone development during infancy.
Thyroid gland have ability to transport iodide (concentrate) from blood which is required for produced thyroid hormones. In this process sodium-iodide symporter is playing the key role to transport iodine molecules into the cell.
Answer:
Prions causes abnormal folding of the prion proteins in the brain.
Explanation:
Prions are the abnormal infectious agents composed only of the proteins and no nucleic acids. The prions cause several neurodegenerative diseases in the humans as well as the mammals.
The prions cause the cow mad disease in the cows by affecting the brain of the cow as the prions act on the prion proteins present in the brain only and change their conformation. This leads to the degeneration of the neurons and causes tiny pores in the brain giving sponge-like appearance.
This slows down the mental activity and thus ultimately leads to the death of the cow.
Two systems that work together to transport the sugar from food to the cells in the organism’s brain are digestive system and circulatory system.
<span>All carbohydrates from the food are broken down into glucose via enzymes from the mouth and small intestine. Absorption of glucose occurs in the microvilli of epithelial cells (small intestine). From there, glucose is transported directly into the bloodstream. Also, pancreas secrets the hormone insulin which makes cell permeable for glucose (via transporters).</span>