During human gestation, rudiments of all organs develop _____
A) in the first trimester
B) in the second trimester
C) in the third trimester
D) while the embryo is in the oviduct
E) during the blastocyst stage
Answer: A
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In an infertile cycle, the endometrium is shed primarily because blood levels of ______ decline.
A. fertilin B. follicle-stimulating hormone C. progesterone D. testosterone
A couple has a child with Down syndrome. The mother is 39 years old at the time of delivery. Which of the following is the most probable cause of the child's condition?
A) The woman inherited this tendency from her parents. B) The mother had a chromosomal duplication. C) One member of the couple underwent nondisjunction in somatic cell production. D) The mother most likely underwent nondisjunction during gamete production.
Peritonitis is potentially linked to problems in
What will be an ideal response?
Na+ ion concentrations are higher outside the cell than inside the cell. What type of transport system is required to move Na+ ions in and out of the cell?
A. Na+ moves into the cell by facilitated diffusion and can not move out of the cell B. Na+ moves in and out of the cell by active transport C. Na+ moves into the cell by facilitated diffusion and out of the cell by active transport D. Na+ moves in and out of the cell by passive diffusion E. Na+ moves into the cell by active transport and out of the cell by facilitated diffusion