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Task 4
B. For each disease explain how and why it develops. Maximum word count for each
disease 150 words - 450 words total)
Disease Why develops How develops
Ebola The disease starts showing Proteins released by
signs on the second day, immune cells create
Ebola is a rare but deadly widespread inflammation,
virus that causes fever, body which can damage the
aches, and diarrhea, and tissue lining blood vessels,
sometimes bleeding inside causing them to leak.
and outside the body. As the Macrophages, a type of
virus spreads through the immune cell that Ebola
body, it damages the infects, release proteins that
immune system and organs. cause clots in the
Ultimately, it causes levels bloodstream, blocking blood
of blood-clotting cells to drop flow to organs such as the
liver and kidneys.
Melanoma Melanoma is caused by the Melanoma. The most
overproduction of certain serious type of skin cancer,
skin cells called melanoma affects the cells
melanocytes. This cell that give our skin its color.
overgrowth usually starts on Although it can spread
an existing mole on the skin easily, it is curable when
or as a new skin growth, treated early.This cancer
usually happens because of forms when the cells that
an over exposure of the skin make melanin grow
to the sun, x rays... abnormally
Alzheimer’s Alzheimer's disease affects The main cause is aging,
the brain. The disease and poor use of mental
causes degeneration of skills.
brain tissue and nerve cells.
With less nerve cells
present, it becomes harder
for the brain to communicate
with the body and function
properly.