Which of the following was an adaptation that evolved in connection with human upright walking?
A. Hair
B. Stereoscopic vision
C. Spinal and pelvic anatomy
D. Fully opposable thumbs
E. Color vision
Answer: C
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The primary purpose of the vascular changes in an invaded or injured area is to
a. produce swelling, redness, heat, and pain b. bring to the affected area phagocytes and plasma proteins that defend against the offending agent c. produce pus d. exert an anti-inflammatory effect to protect against damage by potentially over-reactive defense mechanisms e. trigger specific immune responses
Smoking diminishes ciliary action and eventually destroys the cilia
Indicate whether the statement is true or false
In an ECG, the QRS complex represents
A. depolarization of the atria. B. depolarization of the ventricles. C. repolarization of the atria. D. repolarization of the ventricles.
The human brain is the consistency of tofu and typically weighs about eleven pounds
a. True b. False Indicate whether the statement is true or false