Interval training
a. will get you into shape in about five days.
b. involves long periods of low-intensity activity and builds stamina.
c. involves short periods of intense activity and is used to build strength, speed, and power.
d. can guarantee an athlete an injury-free season.

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

The is a thin membrane that transmits sound waves into the middle ear.

Explain the difference between the james-lange and the cannon-bard theories of emotion. answer - the cannon-bard theory proposes that emotions and arousal occur at the same time. the james-lange theory proposes the emotion is the result of arousal. schachter and singer's two-factor model proposes that arousal and cognition combine to create emotion.