Which of the following is not a function of melatonin?
a. induces natural sleep
b. suppresses reproductive hormones
c. plays a role in breeding behavior
d. enhances immunity
e. all of the above are functions
E
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Answer the following statements true (T) or false (F)
1. An organ is one level of organization higher than a tissue. 2. One important function of the skin is the synthesis of chemicals. 3. A hormone in the endocrine system has a function similar to that of a nerve impulse in the nervous system. 4. The primary organs of the digestive system are found only in the gastrointestinal tract.
Which of the following reduces the angle of a joint?
a. flexion b. rotation c. abduction d. extension e. adduction f. circumduction
The olfactory mucosa contains enzymes that remove odoriferous molecules so that the sensation of smell doesn't linger after the source of the odor is removed
Indicate whether the statement is true or false
The long absolute refractory period of cardiocytes ________
A) ensures a short twitch B) prevents tetanus C) causes the pacemaker potential D) makes the heart prone to arrhythmias E) prevents the occurrence of ectopic focuses