Chemoreceptors located in the aortic and carotid bodies stimulate the respiratory control center in the brain when the blood __________ decreases.
A. PCO2
B. hemoglobin concentration
C. pH
D. PO2
E. HCO3- concentration
C. pH
Biology & Microbiology
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What is the key concept addressed by the question?
What will be an ideal response?
Biology & Microbiology
Early seed plants were pollinated by _______, as are present-day conifers.
A. beetles B. bees C. trilobites D. wind E. water
Biology & Microbiology
Mitochondria are responsible for generating _______ for the cell in the form of _______.
a. cytoplasm; ATP b. energy; glucose c. energy; ATP d. cytoplasm; glucose
Biology & Microbiology
When DNA sequences are compared, the closet living relative of humans is found to be the gorilla
__________________ Indicate whether the statement is true or false.
Biology & Microbiology