Which structure protects the brain from harmful substances traveling in the blood?
a. the cerebrospinal fluid
b. the cerebellum
c. the blood-brain barrier
d. the ventricles
e. the meninges
C
Biology & Microbiology
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Unsaturated fats are considered healthier than saturated fats in the human diet
Indicate whether the statement is true or false.
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Which substance can enter a cell by diffusion without having to be digested?
A. water B. protein C. starch D. fat
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Which classification level would be the most specific?
a. genus b. family c. phylum d. order e. class
Biology & Microbiology
Creutzfeldt-Jakob disease is caused by a
A) bacterium. B) prion. C) virus. D) viroid. E) fungus.
Biology & Microbiology