It is produced through the breakdown of foods that we eat. It is then stored in our muscles, the only problem being it stores a small amount of ATP energy. For our bodies to keep producing the energy needed for an activity then ATP must be continually resythesised. To do this our body breaks down ATP using an enzyme so it becomes
In order to get more oxygen into your body and into your blood to flow to those muscles, you have to take in more oxygen through breathing. The same process occurs when you sweat. When you exercise, your body’s temperature increases, and in attempt to cool you off, your sweat glands the effectors are activated. Consequently the body temperature increases with exercise, the actual time spent 'producing heat' is actually quite short. when the body is too hot ie the blood vessels leading to the skin capillaries dilate, known as vasodilation.
Non-striated- There is non striated muscle in the stomach, it helps the digestive system in the process of digestion of food by causing mechanical digestion due to churning action as muscles contract. It causes voluntary movement particularly during hunger or even when vomiting etc. Columnar Epithelium- Epithelium are protection cells, in the stomach and digestive tract it provides an impermeable barrier against any bacteria that could be ingested but is permeable to any necessary ions. Its especially important in the colon. The pH of the stomach is 1-2 this is strongly acid.
Negative feedback is where various receptors and effectors cause a reaction to ensure certain conditions remain the same. It is an automatic, corrective mechanism within the body. An example of negative feedback is temperature control. If the blood temperature rises, a ‘heat gain’ centre in the brain sends nerve impulses to the skin, which causes vasodilation and sweating, which will cool down the blood. If the blood temperature falls, it stimulates a ‘heat loss’ centre in the brain which sends impulse to the skin, causing vasoconstriction and the cessation of sweating.
The first major muscle movement occurs when food or liquid is swallowed. Although you are able to start swallowing by choice, once the swallow begins, it becomes involuntary and proceeds under the control of the nerves. Swallowed food is pushed into the oesophagus, which connects the throat above with the stomach below. At the junction of the oesophagus and stomach, there is a ring like muscle, called the lower oesophageal sphincter, closing the passage between the two organs. As food
Mobility exercises such as arm circles and knee bends keep our joints supple by ensuring a steady supply of synovial fluid. Ben Adams Long Term Increased Bone Density Weight-bearing exercise such as strength training and running put stress through your bones. In response to this stress our bodies produce cells called osteoblasts (a cell that secretes the matrix for bone formation) which build new bone and makes our bones stronger and denser. Increased bone density can prevent a condition called osteoporosis ( a medical condition in which the bones become brittle and fragile from loss of tissue) which is the weakening of bone and an increased probability of suffering fractures. Osteoporosis is more common in older females but can affect either
SCI/241 THE SCIENCE OF NUTRITION January13,2012 Human Digestion How the does the digestive system works to absorbs nutrients? Digestion starts with the smell of food, it activates the salivary glands. The gland secret saliva that moistens food, it also contains a digestive enzyme called amylase that breaks down some carbohydrates before it leaves the mouth. Then the food is swallowed and goes into the lumen through the esophagus. The esophagus muscles contractions called peristalsis forces the food through the sphincter valve and into the stomach.
Unit 5, Task 2- Gross structure of all main systems P3 Cardiovascular system- The main functions of this system are to transport nutrients, gases and waste products around the body, to protect the body from infection and blood loss, to help the body maintain a constant body temperature and to help maintain fluid balance within the body. The cardiovascular system works in conjunction with the respiratory system to deliver oxygen to the tissues of the body and remove carbon dioxide. Nutrients like glucose from digested carbohydrate are being delivered from the digestive tract to the muscles and organs that require them for energy. Hormones from endocrine glands are transported by the cardiovascular system to their target organs, and waste
A person can dye their hair, undergo plastic surgery, or tan their skin. Our bone structure is predetermined but we are able to modify our body composition by developing proper eating habits and daily physical activity. There are a number of physiological factors that occur during our bodies ultradian rhythms that influence our eating behavior. Early studies believed that the feeling of hunger was brought on by a sudden drop in blood glucose levels, but we have since learned that the fluctuation of glucose levels is very minimal and will actually return to normal with or without consuming food. New studies revealed the discovery of the hormone ghrelin.
An article on blood sugar and the effects of a carb heavy meals on blood sugar, completely explains how a few drinks cause a sensation of false hunger referred to as the Munchies. “When we eat, our body converts digestible carbohydrates into glucose; our main source of energy. Our blood sugar level can affect how hungry and how energetic we feel. Our pancreas creates a hormone called insulin that transports blood sugar into our body's cells where it is used for energy. Eating carbohydrate rich foods or drinks such as alcohol that are quickly processed into blood sugar causes the pancreas to go into overtime to produce the insulin necessary for all this blood sugar to be used for energy.