What type of bond is responsible for the surface tension of water?
A) hydrogen bond B) polar covalent bond
C) ionic bond D) nonpolar covalent bond
Answer: A
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The flap-like structure that prevents food from entering the larynx is called the
A) uvula. B) soft palate. C) epiglottis. D) thyroid cartilage. E) cricoid cartilage.
Which of the following describes a central canal?
A) contains a nerve B) runs parallel to osteons C) contains a vein D) contains an artery E) All of the answers are correct.
Where are the giant multipolar neurons called Purkinje fibers found?
A. The reticular formation B. The cerebral cortex C. The dorsal horn of the spinal cord D. The ventral horn of the spinal cord E. The cerebellum
The half-life of a hormone is
A. half the time until the hormone molecule dissolves. B. one-half of the time it takes to synthesize the chemical messenger molecule. C. half of the duration of the hormone's effects on its target cells throughout the body. D. the time necessary to reduce the hormone concentration in the blood to half of what had been secreted.