Final answer:
Diluting blood increases blood volume, which in turn can affect blood pressure but does not directly decrease blood pressure, heart rate, blood volume, or oxygen levels.
Step-by-step explanation:
When you dilute blood, it typically means you are adding fluid to the bloodstream, thus increasing the blood volume. This does not directly make numbers such as blood pressure, heart rate, blood volume, or oxygen levels go down. In fact, as blood volume increases, pressure and flow typically increase as well. However, a decrease in blood volume can result in a decrease in blood pressure and blood flow. The body has mechanisms, such as cardiac output modification and baroreceptor response, to counteract the changes in blood volume and maintain homeostasis.
Your pulse is caused by the heartbeats, and blood pressure is the force of the blood against the walls of arteries, recorded as two numbers: the systolic pressure (when the heart beats) over the diastolic pressure (when the heart is at rest). The first sound heard when measuring blood pressure refers to the onset of systolic pressure. If blood volume decreases significantly, for example due to dehydration, this could lead to setting off baroreceptor mechanisms that could cause an increase in heart rate as the body tries to maintain adequate blood flow and pressure.
Regarding the options given, dilution of blood primarily affects blood volume and potentially blood pressure as a secondary effect, but not directly causing a reduction in blood pressure, heart rate, blood volume, or oxygen levels.