Each tooth is held in the alveolar socket by the
A) cement.
B) roots.
C) periodontal ligament.
D) alveolar tendon.
E) apical foramen.
C
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Some species of fish are able to produce electrical discharges. These fish
A) Produce discharges continuously from their electric organ. B) Produce only weak discharges of approximately 1 volt. C) Have a specialized electric organ of highly derived nerve and muscle cells known as electrocytes. D) Are known as strongly electric fish.
Which of the following hormones is regulated by the anterior pituitary?
a. parathyroid hormone b. cortisol c. aldosterone d. insulin e. TRH
The PCT reabsorbs water at a constant rate known as what?
a) regulatory water reabsorption b) osmotic water reabsorption c) obligatory water reabsorption d) active water reabsorption
Pericardium surrounds the ________
A) lungs B) intestines C) heart D) brain