Question

the following questions refer to homeostasis.

a) you have just completed your first ironman (a very, VERY strenuous event). you are very hot since this is a very intense race. DESCRIBE ALL THE CHANGES that would occur in your body to restore homeostasis. is this a negative or positive feedback loop? explain. no diagrams please explain thoroughly.

b) describe thoroughly how exactly the endocrine system works and helps to keep the body at homeostasis. no diagrams please explain thoroughly.

Answer 1

a) Homeostasis is the tendency to resist change so as to keep up a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of assorted properties from their target values, known as set points.

First, warm temperature are going to be detected by sensors—primarily nerve cells with endings in your skin and brain—and relayed to a temperature-regulatory control center in your brain. The center will process the data and activate effectors—such because the sweat glands—whose job is to oppose the stimulus by bringing temperature down. When vital sign rises, receptors within the skin and therefore the hypothalamus sense the natural action. The natural process (stimulus) triggers a command from the brain. This command, causes a response (the skin makes sweat and blood vessels near the skin surface dilate), which helps decrease vital sign. Mechanisms that cool you down are Blood flow to your skin increases to hurry up heat loss into your surroundings, and you may also start sweating that the evaporation of sweat from your skin can facilitate your cool off. Heavy breathing can even increase heat loss.

b) Homeostasis is maintained at many levels, not just the amount of the entire body because it is for temperature. as an example, the stomach maintains a pH that's different from that of surrounding organs, and every individual cell maintains ion concentrations different from those of the encircling fluid. Maintaining homeostasis at each level is essential to maintaining the body's overall function. The system plays a vital role in homeostasis because hormones regulate the activity of body cells. the discharge of hormones into the blood is controlled by a stimulus. The system is regulated by negative feedback mechanisms that job to take care of homeostasis. The concentration of hormones, and the way they effect other body systems, are controlled during this manner. For example, blood sugar regulation is controlled by insulin and glucagon, hormones produced by the pancreas. When glucose increases, the pancreas releases insulin, which stimulates the uptake of glucose from the blood. This prevents blood sugar from getting too high. When glucose concentration drops, the pancreas releases glucagon, which stimulates the breakdown of glycogen and releases glucose into the blood. This raises glucose back to normal levels.

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