Which of the following is the muscular ?partition between the thoracic and abdominal cavities, serves as the base of the thoracic cavity, and is the primary respiratory muscle?

What laboratory test may be the best clinical measure for protein deficiency and response to protein supplementation?

A. Creatinine B. Albumin C. Prealbumin D. BUN

_____ changes usually indicate myocardial ischemia or infarction

a. SA node b. AV node c. ST segment d. PR interval