One primary oocyte containing 46 doubled chromosomes yields only one ovum containing 23 unpaired chromosomes
Indicate whether the statement is true or false
T
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A parathyroid gland that is overresponsive to blood calcium levels will produce abnormally high amounts of calcitonin and cause bones to rapidly gain calcium.
Answer the following statement true (T) or false (F)
The membrane covering the surface of the lung is referred to as the
A) visceral pericardium. B) parietal peritoneum. C) visceral pleura. D) serous membrane. E) mediastinum.
During most of ventricular diastole, the
A) ventricles are contracting. B) AV valves are closed. C) the ventricles are filling. D) atria are contracting. E) pressure in the ventricles does not change.
As a result of the long refractory period in the cardiac action potential, cardiac muscle cannot exhibit
A) tonus. B) treppe. C) tetany. D) recruitment. E) fatigue.