Sugar is uncountable; therefore, the sentence has a singular verb. Marbles are countable; therefore, the sentence has a plural verb. 3. Compound subjects joined by and are always plural. 4. With compound subjects joined by or/nor, the verb agrees with the subject nearer to it.
Panic disorder causes panic attacks spontaneous feelings of anxiety, terror, or impending doom. Physical symptoms include heart palpitations, chest pain, and shortness of breath. These attacks may be repeated at any time. People with any type of anxiety disorder may have panic attacks.
Short-Term and Long-Term Effects of Panic-Related Anxiety. A typical episode of panic-related anxiety only lasts up to 10 minutes. During the onset, the individual suffers from the physical and emotional short-term effects mentioned in the previous sections. Headaches, discomfort and lightheadedness are also common.