In the above figure, which letter points to the corpus luteum?
A) A
B) B
C) C
D) D
E) E
Answer: D
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Multiple myeloma is a plasma cell tumor in which a clone of malignant plasma cells produces large amounts of immunoglobulin. With all this excess immunoglobulin, how can a person with multiple myeloma be immunodeficient?
A. All the immunoglobulin produced is most likely specific to one antigen. This limits the ability to respond to the diversity of antigens we encounter. B. The multiplication of the malignant plasma cells may crowd out normal production of other immune cells required for protective responses. C. The massive overproduction of immunoglobulin impairs the kidneys, preventing production of the correct hormones from the kidneys to balance immune system cell production from the bone marrow. D. Through a negative feedback loop, the large amount of immunoglobulin tricks the immune system into thinking it's making a strong response that is needed. As such, it shuts down production of other responses that might truly BE needed to fight off a pathogen. E. All the immunoglobulin produced is most likely specific to one antigen. This limits the ability to respond to the diversity of antigens we encounter AND the multiplication of the malignant plasma cells may crowd out normal production of other immune cells required for protective responses.
The law of segregation states that
A) when two identical alleles come together, complete dominance occurs in terms of phenotype. B) genes for different traits assort independently of each other during the formation of egg and sperm. C) genes separate from each other during gamete formation so that each sperm and egg receive only one allele from each pair. D) when different alleles for the same trait come together, one allele will be recessive to another. E) different alleles for the same gene occupy unique loci on sister chromatids.
An explanation of observations and data supported by the experimental results of many scientists for many years is
A) a theory. B) a hypothesis. C) scientific method. D) popular opinion. E) a control group.
Most cases of toxoplasmosis in patients that are not immunocompromised have the following symptoms:
A. bloody, mucus-filled stools, fever, diarrhea, and weight loss B. fever, swollen lymph nodes, and joint pain C. urinary frequency and pain, and vaginal discharge D. chills, fever, and sweating E. sore throat, low grade fever, and swollen lymph nodes