The answer is viruses change their form when the immune system knows how to kill it and thats how they trick the immune system and viruses are much smaller than bacterias
Micturition
Micturition, part of the urinary process, is where the urine flows from the ureter to the urethra for excretion. This process is done because of the smooth muscles that are present in the vessels of the urethra from the bladder.
Answer:
The correct answer is - Changing PRF.
Explanation:
Pulsed wave Doppler uses the principle of Doppler effect that objects that move changes the characteristic of sound waves. It is creates images by sending the short and quick pulses of the sound, it helps in the determining the velocity of blood in a exact time and location.
PRF or pulse repetition frequencies, is a Doppler sampling frequency that can affect the acoustic exposure of the scanning. PRF is measured in KHz.
Thus, the correct answer is - changing PRF.
<span>Hypertension or high blood
pressure is the force of the blood against the artery walls is high. There are
people in which the symptoms of hypertension is not present even though their
blood pressure is high. Although some may have symptoms or possible results of
hypertension such as headaches, shortness of breath or nosebleeds. When a
person observes that his or her blood pressure is high, he or she must make an
appointment with the doctor. So the answer for this is letter B.</span>
