The parietal bones are joined to the occipital bone by the ________ suture.
A. coronal
B. squamous
C. lambdoid
D. sagittal
Answer: C
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Which of the following is a correct statement about uterine tubes?
A) The infundibulum is the funnel-shaped region near the ovary. B) The isthmus is the normal site of fertilization. C) The mesometrium supports the uterine tubes along their entire length. D) The ampulla is the narrow constricted region.
Which of the following statements is true concerning genetic screening?
A) Genetic screening is rarely done because it yields very little accurate information. B) Screening can be done only in the first trimester of pregnancy. C) Screening is illegal in over half of the world. D) Screening can be done before conception by carrier recognition or during fetal testing.
Reflux of gastric contents into the esophagus occurs because of
A. increased amounts of mucus produced by the stomach. B. increased hydrochloric acid production by the parietal cells. C. relaxation of the cardiac sphincter. D. spasms of the submucosal layer of the stomach wall. E. contraction of the pyloric sphincter.
The long plateau phase of the cardiac muscle action potential is due to
A) movement of fewer sodium ions across the cell membrane into the cell. B) voltage-gated calcium channels remaining open. C) increased membrane permeability to potassium ion. D) decrease in the amount of calcium diffusing across the membrane. E) increased membrane permeability to sodium ions.