Which of the following statements about cancer cells is/are incorrect?
a. They arise only when multiple independent mutations occur within the same cell.
b. They lack the ability to perform the specialized functions of the normal cell-type from which they mutated.
c. The body has no means by which to defend against them.
d. They usually do not adhere well to neighboring cells, so some of them may break away from the parent tumor.
e. Both a and d are incorrect
C
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An atom with three electrons would have a valence of ________.
Fill in the blank(s) with the appropriate word(s).
Which statement is not true?
A. During ventricular systole, the pulmonary semilunar valve is open. B. During ventricular systole, the atria are filling with blood. C. During ventricular systole, the bicuspid valve is open. D. During ventricular systole, the aortic semilunar valve is open. E. During ventricular systole, the tricuspid valve is closed.
The osmoreceptors contributing to water balance are located in the
a. adrenal cortex b. hypothalamus c. juxtaglomerular apparatus d. renal cortex e. renal medulla
While exercise is considered a major factor in causing an increase in growth hormone secretion, an increase in blood amino acids is considered a minor factor
Indicate whether the statement is true or false