Homeostasis Essay

What is homeostasis?Homeostasis is the mechanism in our physical structure that regulates and master(prenominal)tains a stable and constant environment. This enables our body to respond to changes in the environment nigh us as. The homeostatic mechanisms in our body, observe and monitor conditions and testament thusly make a judgment whether to change the way the body functions is arrange to adapt to the break throughside surroundings better. The main organs involved in homeostasis argon the mastermind, liver, come up and kidneys. The unclothe is involved as its acts as a protective layer and also regulates body temperature. The liver breaks down bruising substances and the kidneys regulate water levels and waste products. In the spirit the hypothalamus controls everything and changing them to lead into the outside surroundings. Negative feedback is also linked in as it is the summons of homeostasis. It is ban because it is in a negative situation and will non kick i t unless theres something wrong.Body temperatureWhen we figure out the body has to expire harder, the body temperature would amplify this is due to organs having to work harder to get oxygen to muscles. The metabolic wander that produces more energy has to increase in fiat for more energy to be wall socketd. The nerve centre has to pump more ocellus around the body in rewrite to deliver oxygen to the operative muscles so they idler carry on working at that capacity. What mechanisms ar there to cool the body down?Sweating-glands atomic number 18 stimulated to release sweatLiquid turn into gasVasodilation-your body carries most of the warmth energy around your body There are capillaries underneath your skin that can be filled with smear if you get similarly thermal This brings the blood closer to the surface of the skin so more warmheartedness can be lost, this is why we look red when were hot. What mechanisms are there to warm the body up?Vasoconstriction-this is t he opposite of vasodilationThe capillaries underneath your skin get constricted (shut off) so less heat is lost Piloerection- this is when the h channels on your skin stand upThe hairs trap a layer of air next to the skin which is then warmed by the body heat. tone rateThe heart rate is controlled by the autonomic nervous trunk. This musical arrangement however, is split into two, the forgiving nervous system and the parasympathetic system. The sympathetic system is in charge of speeding up the heart rate when its desireed and the parasympathetic system is there to slow the heart rate down. There are many an(prenominal) reasons why heart rate could increase the main and obvious reasons are fear, stress and recitation. Exercise is one of the main reasons why heart rate would increase as when we employ we need more oxygen to travel to our working muscles. Oxygen is only carried in the blood and the main organ for the blood pumping around the body is the heart. This is when the sympathetic nervous system comes in the receptors promulgate the brain that we are doing exercise and then the brains airs a message to the heart to pump faster, in order for more oxygen to be transported in the blood to the working muscles. When we are not doing exercise we check a chiliad maker of the heart. This pace maker called the Sino atrial node keeps a regular heart beat. We have tested our Sino atrial node by first of all doing exercise to see our risen heart rate, mine was 13. After 5 proceedings of rest our Sino atrial node should have kicked in and our regular heart beat will be taking place, mine was now 11. The negative feedback systemChange in the bodys external environment, the brain receives a message exercise Change in bodys internal systemReceptors detect change and send messages to the brainThe brain organises internal and external body changes to bring the environment back to saneBreathing rateBreathing rate is determined by the hail of breaths taken du ring a certain period of time. This can increase during exercise or any physical activity or trauma. The way in which the body recognises this is by the chemo-receptors. They send a message to the brain, which then sends a message to the heart to pump more blood by thrashing faster, this is because they have detected a change in the amount of one C dioxide that is circulating the body. When the chemo-receptors detect a high level of carbon dioxide, they send a message to the brain to increase or decrease existent rate in order to get rid of carbon dioxide or to replenish the amount of oxygen in the body. What happens next is very sly in the fact that the body recognises that during exercise we need more oxygen. indeed messages in the form of nerve impulses are sent to the diaphragm cause it to contract. When the diaphragm contracts it lowers itself in order for the ribs to expand and gesture upwards so there is increased space for the lungs to inflate. The muscle that all ows the ribs to move up and out is called the inter costal muscle. This process of breathing rate is called inspiration. When we exhale the drive out happens to what has just been explained. The diaphragm relaxes and returns to its original position. The inter costal muscle that allows the ribs to move up and out also relaxes and returns the ribs to their stationary position. This process is known as expiration.Blood glucoseBlood glucose is simply the control of scrape levels in the body, and determines when the body needs more glucose (sugar) or when it needs less. The part of the body that controls the glucose is the pancreas. The pancreas releases insulin which is make to lower blood sugar levels when it gets too high but can also create glucagon that brings the blood sugar levels up when they are too low. Blood sugar levels mainly are affected and altered by the food for thought we eat. Before a meal our blood sugar levels will be running low but after were eaten our blood su gar levels will be a lot higher, and in many cases will need the help of insulin to bring them down to the normal level, among 4 and 8ml, if we have consumed too much. The process of how we get the sugar is from the food we eat, mainly by the carbohydrates we consume. Carbohydrates are taken into the body by the food, and are then digested and changed into glucose that the body can use for energy. During exercise blood sugar levels will fall below our normal, so our body receptors say level ofglucose in the body is too low and therefore will tell the pancreas to produce glycogen to bring our sugar levels back up.