Nerve cells generate electrical signals in response to changes in the environment. This is an example of ________.
A. movement
B. digestion
C. respiration
D. responsiveness
E. filtration
Answer: D
Anatomy & Physiology
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What hormone promotes an increase in the activity of osteoclasts?
A) estrogen B) calcitonin C) testosterone D) parathyroid hormone (PTH)
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The pulmonary trunk receives blood from the right ventricle and conducts it toward the lung. The pulmonary trunk is a(n)
A. capillary. B. artery. C. vein.
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Most nonelectrolytes are covalently bonded organic molecules
Indicate whether this statement is true or false.
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Proteins called ________ are channel proteins that allow the passage of metabolites between neighboring cells.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology