Why is carbon monoxide deadly?
A) It binds to hemoglobin in white blood cells in place of oxygen.
B) It binds to hemoglobin in red blood cells in place of oxygen.
C) It binds to hemoglobin in red blood cells in place of carbon dioxide.
D) It binds to hemoglobin in white blood cells in place of carbon dioxide.
B
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Compared to the first big syphilis epidemic several hundred years ago in Europe, the strains of Treponema pallidum that cause syphilis today
A. tend to be more virulent. B. tend to be less virulent. C. are about equally virulent. D. cannot be compared.
People often talk about each of our “carbon footprints.” What do you think that means?
a. how much carbon dioxide we exhale b. how much carbon dioxide we inhale c. how much carbon dioxide is generated from photosynthesis d. how much carbon dioxide is generated from the burning of fossil fuels to sustain one’s lifestyle
You are a genetic counselor, and a couple comes to you with concerns that if they have a child
together it could have hemophilia. The man has an X-linked recessive form of hemophilia, but the woman does not. Genetic tests reveal the woman is not a carrier for hemophilia. Which of the following would be a correct thing to tell them?
a. Any child that they produce will have a 50% chance of having hemophilia. b. All of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of having hemophilia. c. None of their offspring should have hemophilia, but all of their female offspring will be carriers for hemophilia. d. Each of their male offspring will have a 50% chance of having hemophilia, and while their female offspring should not have hemophilia, they will each have a 50% chance of being carriers. e. All of their male offspring will have hemophilia, and while their female offspring should not have hemophilia, they will all be carriers.
The following are all main points about toxic fish poisoning except:
a. ciguatera poisoning is not usually fatal. b. ciguatera is due to blooms of dinoflagellates. c. puffer fish poisoning can be fatal. d. there are safe and effective antidotes for ciguatera poisoning.