The Role of Probability. Basic Concepts of Probability. A probability is a number that reflects the chance or likelihood that a particular event will occur. Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%.
Thus, when people hypoventilate (i.e. causing an increase in CO2) this causes the pH in your blood to decrease, making it more acidic. (and when hyperventilation occurs, O2 is increased, which causes an increase in pH - making blood more basic).
Each stroke ratchets the hypostome deeper and deeper. After six of them, itâs completely buried and the tick starts to feed. This is a very different sequence of events to what happens when a mosquito bites you (and you can watch a video of that too). Thatâs because ticks, unlike many other blood-suckers, are adapted for the long haul. A mosquito bites, sucks and quickly leaves. A tick bitesâ¦ and stays there for days.