How early can chorionic villi sampling be done?
A. Tenth week of pregnancy
B. Second week of pregnancy
C. Eighth week of pregnancy
D. Fifth week of pregnancy
Answer: D
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Which is not characteristic of the endocrine system?
A. Effects: causes metabolic activity changes in target cells B. Response time: slow reaction time = seconds to hours C. Duration of response: long-lasting = minutes to weeks D. Recovery time: rapid, immediate return to prestimulation level E. Communication method: hormones in the bloodstream
A renal pyramid voids urine into a ________.
A. ureter B. renal papilla C. major calyx D. renal medulla E. minor calyx
Which is TRUE about gastric motility?
A. The basic electrical rhythm of the gastric smooth muscle (three depolarizations per minute) is the same regardless of whether or not food is present. B. When a wave of excitation reaches the pyloric sphincter, action potentials become inhibitory and the sphincter opens wide to allow chyme to exit. C. The force of contraction is decreased by gastrin and increased by enterogastrones. D. The term "slow waves" refer to gastric contractions, while "pacemaker" refers to gastric action potentials. E. Gastric contractions are strongest in the fundus of the stomach.
Which of the following terms does NOT relate to the mitochondria?
A. ATP B. cristae C. self-replicating D. outer and inner membranes E. vitamin A storage