When a jogger starts to run, the rate at which his muscles produce CO2 rises sharply. The CO2 in his blood rises only slightly before he starts to breathe faster and his heart starts beating stronger. Soon his increased rate of CO2 production is balanced by an increased rate of CO2 removal. This would be an example of feedback because the jogger's circulatory and respiratory systems are .

When a jogger starts to run, the rate at which his muscles produce CO2 rises sharply. The CO2 in his blood rises only slightly before he starts to breathe faster and his heart starts beating stronger. Soon his increased rate of CO2 production is balanced by an increased rate of CO2 removal. This would be an example of negative feedback because the jogger's circulatory and respiratory systems are systems regulator.

Explanation:

When an organism increases its partial pressure of carbon dioxide in the blood, it generates a decrease in the physiological blood pH that triggers the activation of a large number of enzymes and, as a gas, it increases its internal partial pressure in the body and thanks to this it spreads to the outside (environment by means of the lung exchanging it for oxygen) thanks to the fact that all gases ALWAYS diffuse to areas of higher partial pressure towards areas of lower partial pressure. That is why homeostasis, and gas exchange, occurs.

Negative

interacting to reduce the elevated CO2 to the a set point.

Explanation:

As the concentration of C02 ( the stimulus) begins to rise by muscular contraction,  chemo-receptors in the breathing center of the hypothalamus detected this stimuli as blood circulate through, and send  sensory inputs to the brain and spinal cord.

Motor output from the brain and spinal cord through  the breathing control center, stimulated the respiratory muscles  to contract,.Therefore the rate of breathing increases . Thus  as  the concentration of CO2(stimulus)rises, rate of breathing increases, to reduce it ,therefore acidosis of the blood is prevented.

Thus  a rise in the level of input stimulus(elevated blood CO2 Conc,) leads to corresponding increases in the output signals(breathing) to reduce the blood CO2 concentration back to the set point. This is negative feedback mechanism.

Thus both the respiratory and circulatory system performs homeostatic interaction to maintain stable blood pH from fluctuating CO2 concentration.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.