Chest pain due to lack of blood nourishment to the heart is called

Which of the following is the correct way to time the frequency of contractions in the pregnant woman?

A) From the beginning of a contraction to the end of the same contraction B) From the end of one contraction to the beginning of the next C) After counting the number of contractions in a 15-minute period, multiply by 4 D) From the beginning of one contraction to the beginning of the next

What portion of the brainstem regulates respiratory rate and depth?

A) Pons B) Medulla C) Midbrain D) Basal nuclei