Download Maintaining Homeostasis

Sheet 07— Temperature Homeostasis
Name: __________________________________
The human body has a natural ability to maintain a balanced internal environment when exposed to changes in its external
environment. This maintenance of balance is called homeostasis. This activity aims to identify how the body maintains homeostasis
when exposed to change.
Task: Cut out and use the labels on the last page, to construct a flow diagram, representing the body’s response to external
temperature change. Arrange the labels in the space below in two loops and use arrows to link them together. Make a mind map
with either Bubble.us or Text2Mindmap and document in you blog.
Sheet 07— Temperature Homeostasis
Name: __________________________________
Maintained
Homeostasis
Sheet 07— Temperature Homeostasis
Name: __________________________________
Hypothalamus
recognises a rise
in internal
temperature,
initiates a bodily
response.
Stimulus:
Lowering of
external
temperature
Stimulus:
Increase of
external
temperature
Circulatory system:
increased heart rate, blood
vessels expand, more
blood sent to the skin.
Circulatory system:
Constricts blood vessels,
limits blood flow to the
skin
Hypothalamus
recognises a lowering
of the internal
temperature back to
acceptable limits.
Stops the response
mechanisms.
Low Temperatures
High Temperatures
Hypothalamus
recognises a rise of the
internal temperature
back to acceptable
limits. Stops the
response mechanisms.
Muscular system:
stimulates the contraction of
muscles to induce shivering,
Nervous system: activates
sweat glands to release
sweat.
Maintained
Homeostasis
Hypothalamus
recognises a
lowering of the
internal temperature,
initiates bodily
response.