What part of the sperm first contacts the egg plasma membrane?
A) the vitelline membrane
B) the cortical granules
C) the acrosomal membrane
D) the actin proteins
E) the fertilization membrane
Answer: C) the acrosomal membrane
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In somatic hypermutation, the mutation of immunoglobulin genes occurs at much higher rates than the mutation rates observed in other genes
Indicate whether the statement is true or false.
________ neurons transmit information about stimuli, in the form of electrical impulses, to integration centers
Fill in the blank(s) with correct word
As with all human herpes virus infections, an important characteristic of HSV-2 infection is
A) complete immunity once the infection has been successfully eradicated by the body. B) an ongoing a latent infection in peripheral nerves which can reactivate periodically. C) progressively worsening outbreaks each time the virus comes out of latency. D) resistance to all anti-viral medications. E) that it is highly dangerous even to immune-competent adults.
What do cytotoxic T cells interact with?
A. MHC class I proteins and viral or cancer cell peptides B. MHC class I and MHC class II proteins C. Viral or cancer cell peptides only D. MHC class I proteins only E. MHC class II proteins and viral or cancer cell peptides F. MHC class II proteins only