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. The nonliving portion of a plant's vascular system that provides support and conveys water from the roots to the rest of the plant. It is made up of vessel elements and/or tracheids, water-conducting cells.