What cell type is responsible for the formation of the blood-brain barrier?
A. oligodendrocytes
B. interneurons
C. Schwann cells
D. astrocytes
D
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Photosynthesis and cellular respiration are examples of ____
a. anabolism b. catabolism c. synthesis d. metabolism e. cleavage
In the lup-dup sound of a beating heart, which
of the following make the first heart sound?
a. closing of the atrioventricular valves b. closing of the pulmonary valve c. closing of the aortic valve d. the contraction of the left ventricle e. the contraction of the right ventricle
The accepted explanation for the disappearance of the dinosaurs is _____
a. the result of an asteroid impact b. the loss of food sources c. competition by mammals d. gas emissions from volcanoes e. giant tsunamis caused by earthquakes
Which of the following pairs is mismatched?
A) Neisseria meningitidis — produces deadly endotoxins
B) Haemophilus influenzae — virulence due to capsule
C) Mycobacterium leprae — cultured in armadillos
D) Cryptococcus neoformans — acid-fast rod
E) Naegleria fowleri — causes amoebic encephalitis