Cardiac output (known as âQâ) is a measure of the amount of blood that is pumped out of the heart in one minute. âQâ specifically refers to the amount of blood pumped out of the left ventricle as this is the ventricle that supplies blood to the muscles and organs of the body.
Preload is defined as the actual stretch or tension on the ventricular myocardium prior to contraction (Totora & Gabowski 2002). The greater the preload on the myocardium (the larger the amount of blood that has filled the heart during diastole), the greater the contraction will be.
Pre-cum is the pre-ejaculate fluid that can be released from the penis during sexual activity. It is usually released before the male reaches orgasm, which results in the ejaculation of semen.Pre-cum prepares the urethra for the semen and helps in lubrication during sexual intercourse.ince the pre-ejaculate can contain sperm, a pregnancy can occur if the man's pre-cum comes in contact with the woman's vaginal canal. However, there is inconclusive evidence as to where the sperm in the pre-ejaculate comes from.