The time period between fertilization and implantation is approximately
A. 5 days.
B. 7 days.
C. 10 days.
D. 14 days.
E. 21 days.
B
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Helper T cells do all of the following except
A) trigger B-cell division, plasma cell maturation, and antibody production. B) provide a rapid response to a future exposure to the antigen. C) enhance production of memory and cytotoxic T cells. D) attract macrophages to the affected area. E) enhance nonspecific defenses.
Growth hormone, via _____, stimulates _______ growth in a long bone to influence its length
a. somatomedins, articular cartilage b. IGF-2, medullary cavity c. IGF-1, epiphyseal plate d. somatomedins, medullary cavity e. IGF-1, periosteum
The most important buffer in our plasma is _______
A. bicarbonate B. phosphate C. protein D. all are equally important
An element's atomic number is determined by the number of ________ in one atom of that element.
A. electrons B. atomic mass units C. nuclei D. protons E. neutrons