NEET BIOLOGY

Detailed explanation-1: -Because gases are exchanged in the lungs, you would expect more carbon dioxide in your breath when exercising, and less when resting.

Detailed explanation-2: -When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide.

Detailed explanation-3: -During exercise, carbon dioxide levels (the metabolic waste) rise in arterial blood. Carbon dioxide induces vasodilation in the arteries while the heart rate increases, which leads to better blood flow and tissue perfusion, and better oxygen delivery to the tissues.

Detailed explanation-4: -Endorphins are chemicals (hormones) your body releases when it feels pain or stress. They’re released during pleasurable activities such as exercise, massage, eating and sex too.

Detailed explanation-5: -It pumps up your endorphins. Physical activity may help bump up the production of your brain’s feel-good neurotransmitters, called endorphins. Although this function is often referred to as a runner’s high, any aerobic activity, such as a rousing game of tennis or a nature hike, can contribute to this same feeling.