?The liver converts toxic ammonia to a harmless substance called

true or false? Preparation for cell division occurs in the G2 phase.

a. true b. false

Which of the following accounts for the heart sounds "lubb-dubb"?

A) closing of the semilunar and atrioventricular valves, respectively B) opening of the semilunar and atrioventricular valves, respectively C) closing of the atrioventricular and semilunar valves, respectively D) opening of the atrioventricular and semilunar valves, respectively

The lumbar regions are located lateral to the umbilical region.

Indicate whether this statement is true or false.

Neuropeptides are mainly neuromodulators that function as second messengers in cells that respond to hydrophilic hormones

Indicate whether the statement is true or false