The most abundant and physiologically important adrenal sex hormone is
a. aldosterone.
b. cortisol.
c. dehydroepiandrosterone.
d. estradiol.
e. testosterone.
C
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Lymphatic vessels recover about ________ of the fluid filtered by capillaries.
A. 25% B. 85% C. 5% D. 15% E. 50%
Choose the FALSE statement.
A. Because sodium and potassium ions cross the membrane during an action potential, their concentrations inside the cell change significantly. B. A hyperpolarized cell has a negative membrane potential compared to one at rest. C. Within a single neuron, different types of voltage-gated ion channels may have different threshold voltages. D. If a second graded potential begins before the first one ends, the voltage changes add together.
The first event to occur during development of the reproductive system would be the ________.
A. formation of the vagina B. development of the Müllerian ducts C. onset of testosterone production D. descent of the testes into the scrotum
If fibers in the ascending tract of the spinal cord are cut, the affected person will have a loss of motor functions below the injury.
Answer the following statement true (T) or false (F)