Q 01/05
A) Cerebrum, brainstem, cerebellum
B) Cortex, thalamus, spinal cord
C) Frontal, parietal, temporal
D) Neurons, glia, meninges
Answer · why
Together with the spinal cord it forms the central nervous system.
Q 02/05
A) About 0.5 kg
B) About 1.2 to 1.4 kg
C) About 2.5 kg
D) About 4 kg
Answer · why
That is about 2 percent of body weight, yet it uses up to 20 percent of the body's energy.
Q 03/05
A) 10 billion
B) 1 trillion
C) 86 billion
D) 500 million
Answer · why
There are roughly as many supportive glial cells as neurons.
Q 04/05
A) 5%
B) 50%
C) 75%
D) 20%
Answer · why
It also takes about 20 percent of the oxygen and a quarter of the glucose.
Q 05/05
A) Glucose
B) Protein
C) Fat
D) Oxygen alone
Answer · why
During fasting it can switch to ketone bodies; low blood sugar can cause loss of consciousness.
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