The gene responsible for producing amyloid precursor protein (app) appears to explain the development of Alzheimer disease.
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- A form of dementia that progresses is Alzheimer's disease. A condition that adversely impacts memory, thinking, and behavior is referred to as dementia. The modifications make daily life more difficult. There are numerous possible causes of dementia, including diseases and brain traumas. Sometimes there is no known cause. The condition is typically diagnosed in patients over the age of 65.
- Alzheimer's disease is typically described as having an "early onset" or "younger onset" if it is discovered earlier. Alzheimer's has no known cure, but there are medications that can halt the disease's growth. Alzheimer's disease is a brain ailment that gradually impairs thinking and memory abilities as well as the capacity to do even the most basic tasks. Additionally, psychological and behavioral changes are common in people with Alzheimer's.
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Answer:
In general, your body fights disease by keeping things out of your body that are foreign. Your primary defense against pathogenic germs are physical barriers like your skin. You also produce pathogen-destroying chemicals, like lysozyme, found on parts of your body without skin, including your tears and mucus membranes. In response to infection, your immune system springs into action. White blood cells, antibodies, and other mechanisms go to work to rid your body of the foreign invader. The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins.
Once infected cells have sensed an invading pathogen, they secrete molecules called cytokines and chemokines. These cells are then primed to resist an infection with the invading virus. Cytokines such as interferons activate anti-viral genes in the infected and neighbouring cells.
Microorganisms capable of causing disease—or pathogens—usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier. Organisms can spread, or be transmitted, by several routes.
The second line of defense is nonspecific resistance that destroys invaders in a generalized way without targeting specific individuals: Phagocytic cells ingest and destroy all microbes that pass into body tissues. For example macrophages are cells derived from monocytes (a type of white blood cell).
If pathogens do manage to enter the body, the body's second line of defense attacks them. The second line of defense includes inflammation, phagocytosis, and fever.
Most flatworms take in food via their mouth, then move it into a digestive gut that attaches to the digestive structures. The food then breaks down and is absorbed out into the rest of the organism. Some have an anus to remove wastes, but most don't and will simply excrete unused food through the mouth.
