Muscle tone is ________.
A) the ability of a muscle to efficiently cause skeletal movements
B) the feeling of well-being following exercise
C) a state of sustained partial contraction
D) the condition of athletes after intensive training
C) a state of sustained partial contraction
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________ does not occur upon exposure to cold
a. Skin vasoconstriction b. Decreased muscle tone c. Nonshivering thermogenesis d. Behavioral adaptations e. Stimulation of thermoreceptors
Nowadays we consider lungfishes to be more closely related to tetrapods than the coelacanths are, but in earlier times coelacanths were thought to be the more closely related forms
How have changes in our way of thinking about phylogenetic relationships changed our opinion in this case?
All of the following are true of the thymus gland except that it
A) activates B cells. B) reaches its greatest relative size before puberty. C) involutes after puberty. D) produces T cells. E) lies in the anterior mediastinum.
A(n) __________ is a condition where viscera protrude through a weak point in the abdominopelvic cavity.
Fill in the blank(s) with the appropriate word(s).