I think the answer is a and 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.
This statement conservationist is working in Northern Pakistan to help farmers whose livestock has been attacked by what vulnerable species of cat is known to be a C N N news headlines as at March, 25, 2022.
<h3>What was the news clip about?</h3>
The news clip talks about some animals that are not endangered species such as Snow leopard, slender snouted crocodile, etc.
It stated that the International Union for the Conservation of Nature classifies that the animals above are endangered, except for snow leopard. They stated that conservationist are taking action to protect their source of food as well and also protecting the snow leopards.
The study was said to have involved 25 villages in the area of Baltistan and it was found that about Ninety-five percent of people here rear livestock along with small agricultural fields but their livestock are said to be attacked by predators which result in huge economic loss. Due to the above, the farmers do fight back by attacking and killing these wild cats.
Learn more about conservationist from
brainly.com/question/24928640
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