Cardiac output is determined by multiplying stroke volume and heart rate.
a. true
b. false

True

Explanation:

The amount of blood that the heart pumps per minute through the circulatory system is called the cardiac output.

Stroke volume is the amount of blood that pushed out of the ventricle in one contraction or one beat.

The cardiac output is calculated by multiplying the number of heartbeats per minute (heart rate) and the stroke volume.

Thus, cardiac output = Heart rate × Stroke volume. The value of cardiac output is expressed as litre/minute.

not meh

explanation:

answer: the answer is d.

explanation: this is because when you exercise you make your muscle produce a certain liquid, that does not evaporate it.   also when you exercise you do not reduce muscle fiber.   and it does not really control your twitch that much.