The process of clonal deletion is designed to
A) Destroy clones of lymphocytes able to react to self molecules.
B) Slow down the immune system in the elderly.
C) Slow down the primary immune response to an antigen.
D) Limit the number of lymphocyte clones an individual has in order to make the system more efficient.
E) Slow down the secondary immune response to an antigen.
A) Destroy clones of lymphocytes able to react to self molecules.
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Which of the following would be secreted across the tubule?
a. sodium ions b. vitamins c. creatinine d. carbon dioxide e. glucose
You drive a nail into a tree that is 10 feet tall, and come back 10 years later. The tree is now 30 feet tall, but the nail is the same distance from the ground. This is because the tree grows up from
A. the apical meristem only. B. the lateral meristem only. C. both the lateral and apical meristems. D. the root tip. E. the node.
DNA polymerase is the enzyme that adds nucleotides to make a new strand of DNA. It requires an older strand of DNA to serve as a template, or guide
Answer the following statement(s) true (T) or false (F)
The olfactory nerve is made up of:
A. chemosensitive hairs. B. axons of interneurons. C. axons of olfactory sensory neurons. D. dendrites of olfactory sensory neurons.