Beta-Blockers. Beta blockers can be helpful in the treatment of the physical symptoms of anxiety, especially social anxiety. Physicians prescribe them to control rapid heartbeat, shaking, trembling, and blushing in anxious situations for several hours.Possible Benefits.Very safe for most patients. Few side effects.sed for short-term relief of social anxiety. May reduce some peripheral symptoms of anxiety, such as tachycardia and sweating, and general tension, can help control symptoms of stage fright and public-speaking fears, has few side effects. Possible Disadvantages. See disadvantages-Beta-Blockers, above.
xylem. the woody vascular tissue of a plant, characterized by the presence of vessels or tracheids or both, fibers, and parenchyma, that conducts water and mineral salts in the stems, roots, and leaves and gives support to the softer tissues. German; from Classical Greek xylon, wood. Origin of xylem.
Xylem (pronounced zye'-lum) is a pipeline that carries water and nutrients from the roots of a plant to the leaves. The term comes from the Greek, xylos or wood. Itâs part of a plantâs vascular system that also includes phloem. Unlike most plant cells, the cells that form the xylem have no end walls.ylem sap moves from roots to the leaves. It actually flows through the xylem system. In addition to carrying water and nutrients from the roots into the leaves and stems of a plant, it also repolaces water lost through transpiration and photosynthesis. The flow system is caused by three things: