• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Analyse how the nervous system and the endocrine system work together to produce a response to a dangerous situation. Evalute the importance of Homeostasis.

Extracts from this document...

Introduction

D1 ? Analyse how the nervous system and the endocrine system work together to produce a response to a dangerous situation. Introduction When we encounter a stimulus as an aggressive dog, sensory neurones carry messages to the central nervous system, and the brain processes the information and decides whether the dog is a threat. If they go is perceived as dangerous, the hypothalamus is stimulated, and this in turn stimulates the sympathetic nervous system. The sympathetic nervous system prepares the body for action by initiating the ?fight or flight response.? This response is produced by the nervous system and the endocrine (hormonal) system working together. Nerve impulses (called action potentials) are sent to the glands and muscles. Nerve impulses are also sent to the adrenal medulla (the inner parts of the adrenal glands, which are located on top of the kidneys). The adrenal medulla releases the hormones, adrenaline and noradrenaline into the bloodstream. The hypothalamus also releases corticotropin-releasing factor (a hormone) into the pituitary gland, which then causes the pituitary gland to release adreno-corticotrophic hormone (ACTH). This hormone stimulates the adrenal cortex (the outer part of the adrenal glands) ...read more.

Middle

An example of this could be if you touched a hot sauce pan, the Sensory Receptors would register the pain almost instantaneously. This information will travel through the nerves to reach the Brain. The Brain understands that your hand is in danger of being hurt or injured in the current position that it is in and then the Brain sends more information down to the other nerves which in turn will tell the muscle in the body to jerk or pull the hand away from the hot pan. D2 ? Evaluate the importance of homeostasis in maintaining the healthy functioning of the body. i) Evaluate the importance of homeostasis in maintaining the healthy functioning of the body. Homeostasis is essential for the body to function correctly. We have looked at how the heart rate, breathing rate, temperature and blood glucose levels are controlled. It is essential to control sodium levels within the body. 1) What is sodium used for in the body? Sodium is an electrolyte and used in balancing water in the body, in generating electrical messages necessary for muscle contraction and nerve transmission, and to control heart rhythms. ...read more.

Conclusion

3) How does the body control sodium levels? Sodium helps to maintain fluid balance; regulates your blood pressure; aids muscle contractions and also nerve transmissions. The body continually regulates its handling of Sodium. When a person eats too much or too little sodium, the intestines and kidneys respond to adjust concentrations to normal. During the course of a day, the intestines absorb dietary sodium while the kidneys excrete a nearly equal amount of Sodium into the Urine. The concentration of Sodium in the blood depends on the total amount of Sodium and water in The Circulatory System - Arteries, Veins and Capillaries. The body regulates Sodium and water in different ways, but uses both to help correct Blood Pressure when it is too high or too low. 4) What are the symptoms of too much or too little sodium in the body? If the body has too little Sodium (Hyponatremia), the body can either increase Sodium levels or decrease water in the body. Too high a concentration of Sodium (Hypermatremia), can be corrected either by decreasing Sodium levels or by increasing body water. If you don?t have enough Sodium in the body you may begin to feel some different effects. For example: dizziness, confusion, tiredness and also muscle cramps. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Healthcare section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Healthcare essays

  1. Explain the importance of homeostasis in maintaining the healthy functioning of the body. examples ...

    capable to deal with heat well making the body temperature go uncontrollable. Hyperthermia needs medical attention which needs treatment. Hyperthermia is a state where the body produces or takes in more heat than it needs. The heat regulation mechanisms of the body usually become overwhelmed and not capable to deal with heat well making the body temperature go uncontrollable.

  2. I will discuss the structure and functions of the nervous system including the structure ...

    fatty deposits build up on the blood vessels, stopping or slowing the flow of blood this is called atherosclerosis. A person that has dementia will usually receive care from many different people across the NHS and social care. Another dysfunction is Multiple sclerosis (MS)

  1. P2 - Physiology of fluid balance

    A colloid is made up of larger particles but they are not visible under the naked eye, only with the aid of an electron microscope. Colloids are dispersed through a type of matter which I have previously discussed; solid, liquid or gas.

  2. Female hormones

    The pharmaceutical industry resurrected estrogen replacement therapy with the new 'safe' hormone replacement therapy - a combination of synthetic progesterone and estrogen which would supposedly protect menopausal women not only from cardiovascular disease but also from the ravages of osteoporosis.

  1. How does dystonia work in the brain?

    The heart muscle is not affected by dystonia. Is it possible to have focal dystonia of the back, abdomen, bladder or diaphragm? Dystonia can involve muscles in almost all parts of the body. Although pure back dystonia is uncommon, it certainly does occur.

  2. What is homeostasis?

    The Lungs: the lungs are a big part of the elimination of carbon dioxide in the body. The Pancreas: the pancreas in included by keeping a constant amount of sugar in the body.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work