Topic 3- Regulation of blood flow Flashcards
Cardiac Output:
The amount of blood that is pumped by the heart.
- The heart rate and stroke volume influence the cardiac output.
Heart Beat:
Stroke Volume:
- Your heart beat/minute.
- The amount of blood pumped out of your body per minute.
What is the healthy rate for cardiac output:
Having a low heart beat and a high stroke volume indicates less energy is used for the heart to beat, but causes blood to flow through the body.
Arteriolar Resistance:
The decrease in the diameter of the arteries causing increased pressure for blood to move through.
Blood Pressure:
The force that the blood exerts on the arterial walls.
Sphygmomanometer:
A tool used to measure the blood pressure of an individual.
Diastolic Pressure and systolic pressure:
Diastolic pressure: The minimum blood pressure.
Systolic pressure: The maximum blood pressure.
Homeostasis:
Maintaining bodies equilibrium.
Low blood pressure:
Reduces the bodies ability to transport blood.
High blood pressure:
Causes the blood vessels to weaken or rupture because of the increased pressure on the arterioles.
- Build up of tissues causing the arteries to harden.
Another word for high blood pressure:
Hypertension
Path to high blood pressure:
stress- release in adrenaline- increased heart rate- high blood pressure Increased blood pressure causes high pressure of blood through the arterioles.
Increased Body Temperature:
Rise in temperature causes a message to the brain.
- Brain sends signal to the sweat glands.
- Blood vessels cause more blood to flow causing the skin to cool down.
- Salts are lost through the sweat.
Decreased Body temperature:
- Sends a message to the brain.
- The blood vessels thin and cause less blood to move through the body.
- Shivering then causes an increase in cellular respiration releasing heat.
- Goosebumps realeses heat.
