The circle of Willis
A. provides an alternate source of blood should a vessel involved be compromised.
B. equalizes blood pressure.
C. a and b
D. Neither a nor b
Answer: C
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During embryonic development, what structure does the optic stalk develop into?
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What will be an ideal response?
Max could be given an immune serum to the rattlesnake venom, thereby conferring passive immunity. The reason for passive immunization is that the venom could kill the person before active immunity could be established. The passive immunity would last until the "borrowed" antibodies naturally degraded in the body. No immunological memory would be established because B cells are not activated.
What will be an ideal response?