Chemical messengers produced in one part of the body that control the activity of other parts are called _________
Fill in the blank(s) with the appropriate word(s)
Answer: Hormones
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Which of the following is an example of bulk flow during gas exchange in vertebrates?
A. movement of water past a respiratory surface B. movement of hemolymph throughout the body C. movement of oxygen from the lung into the bloodstream D. movement of carbon dioxide from body cells into the bloodstream E. All of the answer options are correct.
____ are phagocytes that engulf bacteria and cellular debris
a. Eosinophils b. Leucocytes c. Monocytes d. Platelets e. Neutrophils
In G2, there are typically high levels of the mitotic cyclin. Why is cdc2 not active during G2 if the mitotic cyclin is present?
A. Cdc2 requires ubiquitination to be activated. B. Cdc2 does not bind to the mitotic cyclin. C. Cdc2 is also regulated by phosphorylation. D. Cdc2 also has to bind to cohesin to be activated.
The conversion of gaseous nitrogen (N2) to the ammonium ion (NH4+) occurs during
A. denitrification. B. photosynthesis. C. nitrogen fixation. D. ammonification. E. nitrification.