Rheumatoid arthritis is a type (I/II/III/IV) hypersensitivity reaction that results when B cells produce autoantibodies that damage the joints
What will be an ideal response?
III
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Prostaglandins are ____
a. protein molecules that act either by paracrine or autocrine mechanisms. b. fatty acid derivatives that act either by paracrine or autocrine mechanisms. c. neurotransmitters that act by paracrine mechanisms. d. amine molecules that act by neuroendocrine mechanisms. e. steroid molecules that are lipid soluble.
In humans, sex determination generally depends upon
a. whether or not the X chromosome is present. b. the number of X chromosomes present. c. environment in the womb. d. whether or not the Y chromosome is present. e. how many autosomes are present
Which of the following is one of two or more gene variants that determine a particular trait for a characteristic?
a. allele b. karyotype c. euploid d. aneuploid
__________ relay signals between neurons.
Fill in the blank(s) with the appropriate word(s).