A normal blood pressure for a man in his late forties is 130/82 mm Hg. Explain the two numbers and what they mean.
What will be an ideal response?
Systolic (130) indicates ventricular contraction and Diastolic (82) indicates the “resting” phase of heart contraction.
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Migration is a key evolution mechanism by which microevolution occurs
Indicate whether the statement is true or false
An important message from the work of Thomas Malthus that influenced Charles Darwin was
A. animals tended toward "human perfection." B. only a fraction of any population will survive and reproduce. C. population size of humans can only increase linearly. D. inheritance of acquired characteristics. E. none of these. Charles Darwin was influenced by John Ray not Thomas Malthus.
Gastric bypass surgery is effective in part
because it
a. increases ghrelin levels. b. decreases ghrelin levels. c. increases leptin levels. d. decreases leptin levels. e. increases ghrelin levels and decreases leptin levels.
Spread of a tumor via the blood or lymphatics is known as.
A) metastasis. B) invasion. C) seeding. D) carcinogenesis.