It is well established that developmental biology has impacts on public health. For instance, thalidomide, an anticonvulsive and antihistimine medication, was prescribed to reduce nausea or morning sickness in pregnant women. It was subsequently shown to cause severely deformed limbs (hands and feet, but reduced arms and legs) in children whose mothers took the medication. What might thalidomide
do during development?
A. Cause a defect in the fertilization of an egg.
B. Severely alter blastulation in the embryo.
C. Impair morphogenic fields within the embryo.
D. Impair neural tube formation.
E. Block cell division during blastulation.
C. Impair morphogenic fields within the embryo.
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If heart rate decreases 30% and stroke volume decreases 10%, then what effect do these decreases have on the cardiac output?
A. The cardiac output decreases by 37%. B. The cardiac output decreases by 30%. C. The cardiac output decreases by 20%. D. The cardiac output decreases by 3%. E. The cardiac output decreases by 40%.
A green colony with a black center is isolated on HE agar from a stool specimen. It is most likely which organism?
a. E. coli b. Salmonella spp. c. Shigella spp. d. K. pneumoniae
List the characteristics of cancer cells that make them different from noncancer cells.
What will be an ideal response?
Medicine must respond with new drugs and vaccinations to the slow evolution of disease-causing
organisms such as bacteria and viruses. __________________ Indicate whether the statement is true or false.