If the ECF's osmolarity increases,
a. water will shift from the ICF into the ECF
b. water will not shift between the ECF and the ICF
c. water will shift from the ECF into the ICF
d. vasopressin secretion will decrease
e. sodium excretion will decrease
A
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Why does meiosis pass through two complete cycles?
A. Because two cycles are necessary to produce the proper shape of the gametes B. So that the zygote will have the diploid number of chromosomes C. Because the chromosomes are still double-stranded at the end of meiosis I D. To allow crossing over to occur E. To assure that the gametes will be of the correct size
Structure G is composed of
A) actin.
B) myosin.
C) troponin.
D) tropomyosin.
E) sarcoplasmic reticulum.
A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in
A. relaxation of the muscle fiber. B. contraction with no relaxation. C. muscle hypertrophy. D. fibrosis of the muscle. E. an imbalance of blood calcium.
What genetic disorder is the inability to produce normal hemoglobin?
A. albinism B. sickle-cell disease C. hemophilia D. Down syndrome E. achondroplasia