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Biology, 26.04.2021 21:50 pnhandley01
Which statement correctly describes an interaction between two body systems that regulate internal conditions in an animal's body?
A: Signals carried by nerve cells cause an increase in the heart rate.
B: Hormones released by neurons enter the bloodstream.
C: Hemoglobin enables red blood cells to carry oxygen molecules.
D: New red blood cells form from division of cells in the bone marrow,β
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