Homeostasis refers to the concept of maintaining stable internal conditions in living organisms. The document provides examples of how homeostasis regulates important internal factors like body temperature, water levels, glucose levels, and blood pressure. It explains that receptors detect changes in these conditions and negative feedback mechanisms kick in to return the levels back to normal. For instance, if body temperature rises, the hypothalamus triggers sweating and increased blood flow to the skin to cool down. Overall, homeostasis is how the body automatically counteracts disturbances to keep its internal environment in a stable state.

1. HOMEOSTASIS
for dummies :D
Done by:
Ivan Yap (27)
Kelvin (40)
Iman (25)
Irfan (31)

2. What is Homeostasis?
● The concept of homeostasis is the description for when the
internal conditions of living organisms remain stable. These
internal conditions include your body temperature, pH level,
and glucose level.
● Homeostasis maintains your system in a normal range; if
toxins accumulate in your system, homeostasis would be
disrupted, and you would become very sick.

3. Homeostasis
1. If the water level in your blood increases above the optimal level (norm), it
will be sensed by a receptor (which is a detector) in your body.
2. The body will then respond by returning the water level back to normal.
OPPOSITE
3. Also, if the water level decreases below normal,
4. the body will again respond and cause the water level to rise back to the
optimal level.

4. ● In homeostatic control, your body reacts to bring about an opposite effect to the changes
detected. If the system is disturbedm the dfisturbance sets in motion a sequence of event that
tends to restore the system to its original state. This is the negative feedback proess.
Negative feedback of Homeostasis

5. Temperature Homeostasis
● One of the most important examples of homeostasis is the regulation of body temperature.
● Heat is produced within your body as a result of metabolic activities such as cellular respiration.
High levels of cellular respiration takes place in the muscles and liver. Thus, a large amount of
heat is released in these organs. The heat is distributed to the rest of your body via the
bloodstream.
● The body can also gain extra heat through:
- vigorous muscular exercise”
- the consumption of hot food; and
- being in warm environments ( e.g. being outdoors on a very hot day ).
● Excess heat needs to be removed from the body. If not, one could die of overheating.
● Heat is lost:
- through your skin by radiation, convection and, to a limited extent, by conduction;
- by evaporation of water in sweat from the surface of your skin;
- in the shit and urine; and
- in the air that is exhaled.
● Certain parts of your skin contain shunt vessels. These vessels connect the skin arterioles with
the skin venules. They control the amount of blood flowing through your skin capillaries, which in
turn affect heat loss through your skin surface,

6. ● The hypothalamus in your brain monitors and regulates your body temperature. The
hypothalamus receives information about temperature changes from two sources -
thermoreceptors in your skin which detects temperature from the environment and
thermoreceptors in the hypothalamus which detect temperature of the blood.
● What happens when human body temperature begins to rise?
● When you perform vigorous muscular activities, a large amount of heat is produced. On a warm
day, the rate of heat loss is reduced. The heat produced accumulates in your body and causes a
rise in your blood temperature. This change is detected by the hypothalamus, causing it to send
out the nerve impulses to the relevant body parts to bring about the changes listed in the table
below.
Regulating body temperature

7. ● If the glucose level is above normal, the pancreas will sense this and
excrete more insulin into the liver, which converts glucose to glycogen.
Hence this brings the glucose level back to normal.
● Similarly, if the glucose level is below normal, the pancreas will secrete
more glucagon which converts glycogen to glucose, therefore bring the
glucose up to the original level.
Blood Glucose Concentration Homeostasis

8. ● Another important part of homeostasis is maintaining Blood Pressure.
● The maintenance of healthy blood pressure is an example of
homeostasis. The heart can sense changes in the blood pressure,
causing it to send signals to the brain, which then sends back signals
telling the heart how to respond.
● If blood pressure is too high, naturally the heart should slow down; while
if it is too low, the heart wants to speed up.
Blood Pressure Homeostasis

9. Homeostasis is the state of internal balance of the body. This results in an
unstable internal environment that increases the risk of illness. It is responsible
for many diseases and physical changes in old age.
-Many diseases involve a disturbance of homeostasis.
- -high core temperature (fever)
- -a high concentration of salt in the blood (hypertension)
--low concentration of oxygen (LOC-limiting oxygen concentration)
--diabetes, (high concentration of sugar)
--dehydration, (low concentration of water)
--hypoglycemia,(abnormally diminished content of glucose in the blood)
--hyperglycemia,(excessive amount of glucose circulates in the blood plasma)
--gout(acute inflammatory arthritis)
Medical conditions associated
with Homeostatic Imbalanced

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