Answer:
Explanation:
Niacin is widely distributed in plant and animal foods. Good sources are bakers' yeast and meats (including liver), cereals, legumes and seeds but significant amounts are also found in many other foods such as milk, green leafy vegetables, and fish, as well as coffee and tea. Niacin occurs in plants mostly as nicotinic acid and in animal tissues mostly as nicotinamide.
In plants niacin is found mostly in a bound form (sometimes referred to as niacytin or niacinogen) affecting its availability in the diet. In maize, niacin is present in covalently bound complexes with small peptides and carbohydrates and is therefore unavailable when eaten. The bioavailability of the bound form of niacin can be improved substantially by hydrolysis with a mild alkali. It has long been a tradition in Central America to soak maize in lime-water prior to the preparation of tortillas. This practice effectively liberates the bound niacin and appears to be responsible for effective protection against pellagra in that part of the world. In other plant foods, the bound niacin is heat-labile and the niacin can be released by heating. Thus, the roasting of coffee beans increases the available nicotinic acid content in coffee from 20 to 500 mg/kg coffee beans (Combs, 1992). This practice might have contributed to the prevention of pellagra in South and Central America along with the regular consumption of beans that are good sources of bioavailable nicotinic acid.
Answer:
it leads to starvation
Explanation:
if a poor person is food insecure then he wont be able to survive due to lack of nutrients and basic need to keep the body helathy
Answer:
1) cortical epithelial cells; (2) macrophages and dendritic cells
Explanation:
T cells, also known as T lymphocytes, are a fundamental type of cell of the immune system that determines the specificity of the immune response to specific foreign particles (antigens). T cells are produced in the Thymus (it is for that reason that they are called T cells) and then circulate throughout the bloodstream in order to recognize specific antigens in association with major histocompatibility complex (MHC) molecules on the surface of antigen-presenting cells (APC), such as macrophages and dendritic cells. T cells undergo positive and negative selection: 1- positive T-cell selection refers to the process by which T cells bind cortical epithelial cells that express Class I or Class II MHC molecules with enough affinity to get a survival signal; whereas negative selection occurs when T cells bind to macrophages and dendritic cells that express MHC specific receptors with a strong enough affinity to get an apoptosis (programmed cell death) signal.
Answer:
There are many ways to determine if the information is credible or not. One way is to ask yourself "Did the person or website list cites?" Cites are good ways to determine if the information is credible or not or not. Cites mean that you can prove where the information they are presenting came from.
Answer:
The answer for Plato is strength and Endurance.
