Cold and Flu Appointment Guide. Burning accompanied by redness around the outer ear and the skin around your ear can be indications of a serious infection that should prompt you to contact your health care provider right away.
You answered: Correct Answer: The average adult human brain has about 100 billion cells. Linked by synapses, each brain cell can connect to tens of thousands of other brain cells. It's still a mystery exactly how these connections work together to create all the marvels of our brains. Next.
Please note that the answer listed here - over 400,094,800 - refers to the number of cells in the human brain. The 100 billion figure, mentioned repeatedly in the sources quoted above, refers to neurons or nerve cells, which are only one kind of brain cell.