Natural passive immunity is associated with which of the following?
a) Vaccination
b) Exposure to a microbe resulting in antibody formation
c) Receiving booster shots
d) Transfer of IgG from mother to fetus
e) Intravenous injection of antibodies
d
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All but one of the following is a function of the low pH found in the stomach. Select the description below that does not reflect a role of stomach acid
A) The stomach's acid catabolically breaks down food stuffs in preparation for absorption. B) Stomach acid denatures proteins making the poly peptide chain more accessible to pepsin digestive enzymes. C) Many potentially harmful bacteria will be prevented entry to the small intestine by stomach acid. D) Low pH converts pepsinogen to its active form of pepsin, preventing the protease enzyme from digesting the cells that produce it.
Gallstones may block the flow of bile from the gallbladder by becoming lodged in the:
A) cystic duct. B) common hepatic duct. C) hepatic portal vein. D) accessory pancreatic duct.
All of the following things occur during meiosis I with the exception of one thing. Select the statement below that does not occur during meiosis I
A) A single diploid (2n) cell has become two haploid (n) cells. B) Portions of maternal chromosomes crossover with equivalent portions of paternal chromosomes. C) The sister chromatids are separated from each other. D) The homologous chromosomes are separated from each other.
The job of a sperm cell, or spermatozoan, is to get to the egg as soon as possible and fertilize it. Sperm cells would be expected to have a lot of A) mitochondria.
A) mitochondria. B) centrioles. C) smooth endoplasmic reticula. D) rough endoplasmic reticula. E) peroxisomes.