Answer;
-Atrial contraction;
Explanation:
-The cardiac cycle comprises all of the physiological events associated with a single heartbeat, including electrical events, mechanical events (pressures and volumes), and heart sounds.The atria and ventricles alternately contract in each cardiac cycle. The pressures in the chambers change greatly over the course of the cardiac cycle.
-During atrial contraction, blood flows from atria (high pressure) to ventricles (low pressure). Similarly, this same pressure gradient exists during ventricular filling.
Answer:
Shark is hyperosmotic relative to sea water.
Explanation:
The sharks that live in the marine environment do not need to drink sea water unlike others.
This is because the concentration of the urea and oxide is trimethyl amine gets deposited in the tissues of the shark which is hyper osmotic condition to the outside environment( sea water).
There is an adequate amount of potassium, sodium and chloride in the body of shark.
This is how the shark maintains the osmoregulatory mechanism in marine environment.
C, A, B, B, C, B
Conservation is energy can neither be created nor destroyed.
When something is stationary it has potential energy and when it gets set into motion it has kinetic energy.
Answer:
Food that we eat serves as the source of reactant for the process of cellular respiration.
Cellular respiration can be defined as the biological process which uses glucose as reactant to convert into carbon dioxide and water.
This process also releases energy which is used by the body to perform various functions.
This glucose which is used in this process comes from the food that we eat. The food is rich in carbohydrates, fats and proteins which is used up during the process of cellular respiration.
