Why must the adaptive immune system develop a capacity to discriminate between foreign antigens and host antigens?
What will be an ideal response?
Answer: Because all macromolecules in the host are potential antigens, the host immune system must avoid recognizing host macromolecules. If the host immune system recognizes host macromolecules, antibodies or T cells would damage them.
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The first Archaea were found in extreme environments
1.True 2.False
Which of the following structures is NOT
found in mature sperm? a. nucleus b. acrosome with enzymes c. mitochondria d. microtubules in the tail e. ribosomes
How is summation related to IPSPs and EPSPs? What is the difference between temporal summation
and spatial summation? What will be an ideal response?
The two major divisions of the nervous system are the ________
A) sympathetic and parasympathetic B) central nervous system (CNS) and peripheral nervous system (PNS) C) sensory and motor D) voluntary and involuntary