How will your body respond to a significant decrease in red blood cells as occurs after a blood donation?
What will be an ideal response?
Answer: The decrease in oxygen delivery causes the kidney to secrete the hormone erythropoietin, which stimulates the bone marrow to produce erythrocytes, increasing blood hemoglobin levels and oxygen carrying capacity back to normal.
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The large surface area in the gut directly facilitates _____
A) secretion B) absorption C) elimination D) filtration E) temperature regulation
Which of the following statements does not describe a function of the lateral meristem?
A. Lateral meristems produce new cells. B. Lateral meristems allow plants to grow in diameter. C. New cells produced by lateral meristems grow in diameter and length. D. Lateral meristems produce the substance we commonly call wood. E. Lateral meristems are responsible for secondary growth.
In the figure above, the viral DNA in the
lysogenic pathway
a. has been destroyed by host bacterial enzymes. b. is integrated into the bacterial chromosome. c. has been copied and changed into bacterial DNA. d. is no longer present. e. has been transcribed into RNA
Photoperiodism is the
a. duration of flowering in a plant. b. amount of light needed by a plant to exhibit normal growth. c. response of a plant to the duration of light and darkness. d. light phase of photosynthesis during which photolysis of water occurs. e. opposite of photorespiration