Which of these does not match the type of cellular transport with the level of energy necessary for its function?
A) simple diffusion: no energy required
B) facilitated diffusion channel: no energy required
C) facilitated diffusion carrier: energy required
D) active transport: energy required
E) facilitated diffusion carrier: no energy required
C) facilitated diffusion carrier: energy required
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Hexokinase is an enzyme that binds specifically to glucose and converts it into glucose 6-phosphate. The activity of hexokinase is suppressed by glucose 6-phosphate, which binds to hexokinase at a location that is distinct from the active site. This is an example of
A. feedback inhibition. B. competitive inhibition. C. cofactor binding. D. allosteric activation.
The act of nursing stimulates the contraction of smooth muscle cells in the breast. If a newborn infant is unable to nurse, then
A. progesterone secretion is not inhibited. B. milk is not produced. C. oxytocin is not secreted. D. prolactin is not secreted. E. prostaglandins are not secreted.
How do barrier methods of birth control prevent conception?
What will be an ideal response?
What type of immune response is always disadvantageous to a person?
A) inflammatory B) humoral C) autoimmune D) complement-mediated