Answer:
Sinoatrial Node
Explanation:
The sinoatrial node is like the natural pacemaker of the heart because it controls the heart beat or in other words, the cardiac rhythm. The sinoatrial node is found on the right atrium and it sends signals to both atria and then they contract. The signal is then carried to the atrioventricular node which spreads the signal to the ventricles and then the ventricles contract. The contractionof the ventricle is the pumping action of the heart.
Answer:
Preservatives are the chemical substances which are added to the products like pharmaceuticals, paints, biological samples, foods and many other products to prevent the disintegration or rotting mainly caused by the growth of microbes or due to undesirable chemical changes.Preservations are of 2 types i.e. chemical & physical. Chemical preservation means addition of chemical compounds to the products. Physical preservation means process such as refrigeration & drying. Preservatives aims at decreasing the risk of foodborne infections, reduce microbial spoilage & to improve nutritional quality. Some physical methods used for food preservation include dehydration, freeze drying, refrigeration & UV-C radiation. Chemical And physical preservation are sometimes used in the combination.
The advantages of using the food preservatives are:
- Decrease the moisture content
- Increase the acidity
- Preventing the ripening process( naturally)
- Acts as an antioxidant
- Lowering the food waste
Main properties of ideal preservatives :
- It should not be poisonous
- It should not be irritant
- It should have physical as well as chemical stability
- Preservative must maintain the good compatibility with other ingredients used in the process of developing food
- It should acts as preservative in small concentration
- It should retains activity through food manufacturing, shelf life & usage
<h2> HELLO</h2><h2>_______________________________</h2><h2>THIS INFO BELOW WILL HELP YOU</h2><h2>_______________________________</h2><h2>Environmental policy is aimed at balancing environmental protection and the conservation of natural resources with other policy goals, such as affordable energy as well as economic growth and employment. Federal and state environmental rules cover air quality, water quality, waste management, land conservation, chemical and oil spills, drinking water quality. Some environmental policies regulate the actions of private individuals, organizations, or businesses. For example, a factory that must discharge wastewater as part of its daily operations may need to hold and maintain a federal permit. The factory would be required to follow a set of rules and requirements within its permit to comply with environmental laws.
</h2><h2 /><h2>Environmental rules and regulations vary in their requirements depending on issue involved. Environmental policy and energy policy are also interconnected. For example, energy production and consumption can produce environmental effects. As a result, environmental policy can involve restrictions or regulations on energy production such as oil and natural gas operations or solar energy development.</h2><h2>____________________________________</h2><h2>so that means the answer is reduce the use of natural resources</h2><h2>____________________________________</h2><h2>hope this helps have a good day :):):):):):):):):):)</h2><h2> Goodbye</h2>
a term you can use could be <u>Variety</u> or a <u>Variant</u>
