Beginning at the lumen, the sequence of layers of the digestive tract wall is
A. submucosa, mucosa, serous membrane, muscularis.
B. muscularis, lamina propria, submucosa, mucosa.
C. mucosa, submucosa, muscularis, serosa.
D. peritoneum, submucosa, mucosa, lamina propria.
E. submucosa, mucosa, adventitia, muscularis.
C
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This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light chain protein.
A) myosin heavy chain B) myosin light chain kinase C) myosin light chain phosphatase D) tropomyosin
The phenotypes and genotypes that result from a cross of Aa and aa (A = normal
pigmentation and a = albinism) are A) phenotypes-all normal; genotypes-50% heterozygous and 50% homozygous recessive. B) phenotypes-all albino; genotypes-50% heterozygous and 50% homozygous recessive. C) phenotypes-50% normal and 50% albino; genotypes-50% heterozygous and 50% homozygous recessive. D) phenotypes-all albino; genotypes-all homozygous recessive.
What is the first source for supplying additional ATP when exercise begins?
a. oxidative phosphorylation b. glycolysis c. lactate d. creatine phosphate e. chondroitin
Contraceptive pills mimic the ________ feedback effect of ________
A) negative; human chorionic gonadotropin (HCG) B) positive; FSH and LH C) positive; estrogens and progesterone D) negative; FSH and LH E) negative; estrogens and progesterone