Temperature homeostasis

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A GUIDE

Homeostasis refers to the
maintenance of a constant internal
environment

Internal environment:
 This refers to the conditions within the body of the
organism.
 In humans, this includes the bloo...

 By ensuring a relatively stable internal environment,
homeostasis allows organisms to be independent from
changes in the...

Homeostasis also involves a
process called negative feedback:
 In homeostasis control, your body reacts to bring
about ch...

 In a negative feedback control loop, there must
be:
 A normal condition or set-point to be maintained
 A stimulus; whi...

Temperature homeostasis (Thermoregulation)
basically refers to the regulation of body
temperature, which in turn means the...

 The body regulates temperature by balancing the
amount of heat lost and heat produced from and by
the body.
 Animals th...

 Endotherms: Normally maintains their body
temperature at 35-40 degrees, and hence known as
warm-blooded creatures (e.g. ...

 In Humans,
 Heat is produced in the body when processes such as
cellular respiration (when cells respire) occurs.
 Hig...

 The body can gain extra heat through:
 Vigorous muscular exercise
 The consumption of hot food
 Being in warm environ...

The body can lose heat through:
 The skin by radiation –the transfer of heat in the form
of waves without the use of a me...

How does you body regulate
temperature?
 The hypothalamus (a portion of your brain that
contains a small number of nuclei...

What happens when human body
temperature begins to rise?
 When one performs rigorous exercise, a large amount
of heat is ...

What happens when human body
temperature begins to fall?
 On a cold day, the rate of heat loss increases, especially
at t...

Blood Glucose concentration

 It is the balance of the hormones insulin & glucagon to
maintain the concentration of glucose in the blood at a
constant...

 Insulin is a hormone which plays a key role in the
regulation of blood glucose levels. It is secreted by the
beta cells ...

 Insulin is released from pancreatic beta cells in the
Islets of Langerhans.
 The uptake of glucose is stimulated, the c...

 The hormone glucagon is secreted by the alpha cells in
the Islets of Langerhans in the pancreas.
 During starvation or ...

What is blood Pressure?
 the pressure of the blood against the inner walls of the blood vessels,
varying in different par...

Regulation of blood pressure
 The circulatory system plays a major role in the
regulation of temperature, body fluids, gl...

What’s the purpose of regulating
blood pressure ?
 Changes in blood pressure are routinely made in order
to direct approp...

How is Blood Pressure Controlled
by Homeostasis?
Blood Pressure is controlled by homeostasis through
the use of sensory re...

A diagram on Blood Pressure
Homeostasis
 It shows the contribution of vasopressin and vasopressin
receptor type V1a and V...

A HOMEOSTATIC IMBALANCE IS THE
DISTURBANCE OF THE HOMEOSTASIS IN
THE HUMAN BODY. THIS RESULTS IN AN
UNSTABLE INTERNAL ENVI...

DIABETES MELLITUS
• Insulin is a hormone responsible for regulating
carbohydrates and fats in the body. It causes the cell...

DEHYDRATION
 Dehydration is the excessive loss of body water.
• Fluid balance is maintained through a process called ‘wat...

HYPOGLYCaEMIA / HYPERGLYCAEMIA
 Hypoglycaemia is the condition in which a person has low
blood glucose level.
 Hyperglyc...

GOUT
 Gout is caused by the high levels of uric acid in the
blood.
 * Uric acid is a metabolic product that causes a per...

Medical conditions:
 An inability to maintain homeostasis may lead to death or
a disease condition known as homeostatic i...

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