All of the choices from a to c, those are: congestion, cardiovascular disease, respiratory disease may be caused by the continued exposure to the polluted air. When polluted air gets inside our body, the body gets lesser fresher oxygen than the amount it really needs.
20 minutes is the correct answer
Answer:
1st question Answer choice B, either A or B for question 2.
Explanation:
I said either A or B because for some people its hard for there grades to go up so it takes them longer and for answer choice A its hard for people to write so id say either A or B
The cardiac cycle consists of two phases; a period where the heart muscle is relaxed, called <u>diastole</u>, and a period of contraction, called <u>systole</u>.
These are then divided into four stages. These are;
1.<u>Ventricular Filling Period (VPF)</u>
2. <u>Isovolumetric Contraction Period (ICP)</u>
3. <u>Ventricular Ejection Period (VEP)</u>
4.<u> Isovolumetric Relaxation Period (IRP)</u>
At rest, cardiac diastole lasts for approximately 0.5 seconds, and cardiac systole lasts approximately 0.3 seconds to complete. However, during exercise, when the heart rate is increased the time period of <u>diastole</u> , especially, is reduced.
