Light alerts the biological clock to cease secreting ________, a hormone that promotes sleep.
Fill in the blank(s) with the appropriate word(s).
melatonin
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Which of the following best describes spit tobacco?
A. It usually causes changes in the gums and lips after 6-12 months of use. B. In 5 minutes, it can deliver the same amount of nicotine as two or three cigarettes. C. It causes leukoplakia and gingivitis. D. It does not contain chemicals known to cause cancer.
The 400-meter swim is an aerobic exercise
Indicate whether this statement is true or false.
All of the following are treatments for a spinal cord injury EXCEPT ________
A) the use of a spinal board and cervical collar in the ambulance B) surgery to fuse damaged vertebrae C) a ventriculoperitoneal shunt D) a corticosteroid drug to decrease inflammation
Deep abdominal breathing is frequently a signal that the fight-or-flight response is activated.
Answer the following statement true (T) or false (F)