Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) High Blood Pressure ?
    ### Response:
    Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls.
    