A rheostat is a device which is used to vary the resistance in an electrical circuit without interrupting the circuit.heostats are a kind of potentiometer. These devices can be used in a variety of settings, and are usually designed to be sealed so that environmental factors cannot interfere with the function of the circuit.
This chemical can cause allergic rhinitis and its symptoms, including a runny nose, sneezing, and itchy eyes. In addition to tree pollen, other common allergens include: grass pollen
Bronchiolitis (RSV and wheezing in infants) Bronchiolitis is a viral infection of the lungs, which affects primarily infants and toddlers. Some or all of the following symptoms are present with bronchiolitis. 1  Wheezing: a high-pitched whistling noise when your child breathes out. You may actually hear this yourself, or a physician may hear wheezing when she listens to your child. 2  Rapid breathing: at a rate of 40 breaths per minute or faster.