ANS: problems related to arterial insufficiency. Night leg pain is common in aging adults; it may indicate the ischemic rest of peripheral vascular disease. Alterations in arterial circulation cause pain that becomes worse with leg elevation and is eased when the extremity is dangeled <span />
The primary function of the auxin hormones is to elongate plant cells in the stem. For instance, auxins are the hormones responsible for phototropism, the growth of a plant toward the light.
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D is cnidarian. They have some cnidocytes.
Receptors on the plasma membrane either recognize a particle as acceptable or foreign.
