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.
The physical symptoms of a panic attack are caused by your body going into fight or flight mode. As your body tries to take in more oxygen, your breathing quickens. Your body also releases hormones, such as adrenaline, causing your heart to beat faster and your muscles to tense up.