Throat clearing, like coughs, is often a hangover from a viral respiratory infection such as a cold, and can persist after an infection for more than eight weeks. However, you donât mention having been ill, so the next thing to consider is your history of asthma.
And, vice versa. When the triceps contracts, pulling the lower arm back down to its starting position, the biceps relaxes. Most, but not all, of the skeletal muscles in your body work in these agonist-antagonist pairs. If the agonist flexes a muscle, then its antagonist extends the muscle.
HOW MUSCLES WORK. A voluntary muscles usually works across a joint. It is attached to both the bones by strong cords called tendons. When the muscles contracts, usually just one bone moves. For example when the biceps in the arm contracts, the radius moves but the scapula does not.