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Author Question: Adolescent acne is caused by A) hormonal changes. B) consumption of chocolate. C) eating fatty ... (Read 23 times) |
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Blood is approximately twice as thick as water because of the cells and other components found in it.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").