Tom is choking on a piece of steak that is stuck in his trachea, and he signals for his young son to call 911. It takes the paramedics four minutes to reach his house. Will this be in time to save Tom (and why), or will Tom already be dead (and why)?
A. Tom will be alive since he had a reserve of about three-quarters of his hemoglobin still bound to oxygen when he started choking.
B. Tom will be alive since the myoglobin in his muscles will release oxygen into the blood after he stops breathing.
C. Tom will be dead since all the hemoglobin in his arterial blood will unload its oxygen during the first pass through the tissues after his last breath.
D. Tom will be dead due to the lowered pH of his blood.
Answer: A
You might also like to view...
If two species are able to mate and produce an offspring which can mate with itself, but is unable to mate with either parent's species, it is an example of
A. allopatric speciation. B. sympatric speciation via disruptive selection. C. sympatric speciation via polyploidy. D. a species cluster. E. character displacement.
How many different biochemicals were detected in samples from potatoes?
a. 5 b. 2 c. 3 d. 4
When new species move into a wide range of habitats during microevolution, it is known as ____
a. adaptive radiation b. natural selection c. genetic drift d. mass extinction e. minor extinction
A zygote
A. is haploid. B. contains all of the genes from each parent. C. is formed by meiosis. D. is genetically different from either parent.