Organisms, like the arctic fox, that live in cold environments have evolved counter-current heat exchangers in their limbs to help maintain their body temperature at a level well above the ambient temperature. This explanation could be considered
a. mechanistic.
b. evolutionary.
c. teleological.
d. all of these.
e. none of these.
c
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Sympathetic axons innervate the afferent and efferent arterioles of the kidneys
Indicate whether this statement is true or false.
The endocrine system secretes ____ into the blood to be transported to their target cells.
Fill in the blank(s) with the appropriate word(s).
What is tubular secretion?
a) the movement of water and solutes from the tubular fluid into the blood b) the movement of water and solutes from the glomerular capillaries into the glomerular capsule c) the movement of water and solutes from the blood into the tubular fluid
What part of the brain sets the basic respiratory rhythm?
A. Limbic system B. Pons C. Hypothalamus D. Medulla oblongata E. Cerebral cortex