While you are riding the ski lift up to the top of the mountain on a very cold day you start to shiver involuntarily. You know that the shivering is your body?s attempt to help regulate your body temperature and is an example of what type of mechanism?
A. sensitivity
B. evolutionary adaptation
C. homeostasis
D. energy utilization
C. homeostasis
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The difference between benign and malignant tumors is that
A) benign tumors have not lost growth control. B) benign tumors do not stimulate angiogenesis. C) benign tumors have not spread to other sites. D) malignant tumors are adherent. E) benign tumors are cancers, while malignant tumors are not.
The root-shoot axis of plants
A. is determined by the orientation of the first zygotic cell division. B. is determined by sunlight, as roots grow away from the sun and shoot grow towards the sun. C. is determined by three axes. D. develops in segments. E. None of these are correct.
The minimum level of depolarization required to initiate an action potential in an excitable cell is called the ____
potential.
a. electrical b. refractory c. membrane d. resting e. threshold
What is the main reason testing for cold agglutinins is no longer recommended to diagnose infection with Mycoplasma pneumonia?
A. It is difficult to perform. B. False positives may be caused by certain viruses. C. Very few people develop anti-I antibodies. D. It requires expensive instrumentation.