In the steps of the scientific method, what is the process where a scientist writes down tentative explanations or statements about what he/she expects might happen under certain conditions?

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Where substance is produced during cellular respiration

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.