The movement of substances to regions of lower concentration is called
A. pinocytosis.
B. exocytosis.
C. diffusion.
D. active transport.
E. pumping.
Answer: C
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A patient presents with the following symptoms: anemia, heart failure, pneumonia, paralysis, and abdominal pain
After learning about their family history, you run a genetic test for which disorder?
a. cystic fibrosis b. albinism c. sickle-cell anemia d. achondroplasia e. schizophrenia
Autoimmune diseases are caused by the attack of
a. virus infections on joints and nerves. b. virus or bacterial infections on cells of the immune system. c. the immune system on viral-infected cells. d. a person's own antibodies on his own immune cells. e. a person's own immune cells on his own tissues.
Which of the following groups has the most species?
A) kingdom B) order C) phylum D) domain
Color deficiency is more common in men than in women because
A) crossing over occurs only in women. B) the gene is located on the Y chromosome. C) men have only one X chromosome. D) women cannot inherit the gene from their fathers. E) men get more copies of the gene than do women.