The action potential of cardiac pacemaker cells is caused by ________.
A. inward diffusion of K+
B. inward diffusion of Na+
C. outward diffusion of K+
D. inward diffusion of Ca2+
Answer: D
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A system where a portion of the sale price of every pig goes to the National Pork Board to promote and improve the pork industry is ________________
Fill in the blank(s) with correct word
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How can DEXA scans be used to diagnose endocrine disorders?
A. DEXA scans can determine inappropriate levels of chemicals in the blood. B. DEXA scans can determine changes in bone growth. C. DEXA scans can determine inappropriate levels of chemicals in the urine. D. DEXA scans can determine changes in bone density as they age.