Because of different origin and insertion sites, the flexor carpi radialis muscle flexes and abducts the wrist, while the flexor carpi ulnaris flexes and ________ the same joint.
Fill in the blank(s) with the appropriate word(s).
opposition
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Which is NOT true about AIDS?
A. The HIV virus preferentially enters and disables B cells. B. It is caused by a virus that contains RNA. C. It is caused by a retrovirus. D. It is transmitted by intimate contact with infected blood, sexual intercourse with an infected partner, or by an infected mother to her breast-fed infant. E. Certain unusual cancers such as Kaposi's sarcoma co-occur with relatively high frequency.
Positive feedback mechanisms usually produce
A) long-term changes. B) unstable conditions. C) changes returning values toward a set point. D) stable conditions around a set point.
Hormones can be classified according to their chemical structure, i.e., ____
a. amino acids, amines and thyroid hormones b. peptides, amines and steroids c. peptides, catecholamines and indoleamines d. catecholamines, amines and cholesterol e. steroids, amino acids and thyroid hormones
As the luteal phase ends, menstruation occurs.
a. true b. false