Vital capacity is reduced in pulmonary restrictive disorders, but normal in obstructive disorders.
Answer the following statement true (T) or false (F)
True
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An action potential on a neuron develops when
a. threshold voltage is reached on an axon b. voltage-gated Na+ channels open c. spatial or temporal summation of graded potentials occurs to a great enough degree d. the axon hillock reaches threshold voltage e. any of the above events occur
Which of the following hormones causes water retention by the kidneys in times of dehydration?
A. Glucagon B. Adrenal androgens C. ADH D. PTH E. Somatostatin
People with diabetes mellitus have polyuria because they ________.
A. drink a lot of water B. have inadequate amounts of aldosterone C. have greater oncotic pressure in the kidney tubules D. have inadequate amounts of ADH
Hyperpolarization of a neuron results from
A. the entrance of either sodium or potassium. B. the entry of any ion. C. either the entry of an anion or the exit of a cation. D. either the entry of a cation or the exit of an anion.