Temperature Changes And Negative Feedback Flashcards
What is one role of the hyper thalamus
Maintains constant environment
Define receptor
Detects changes around the body
What does feedback loops in biological system allow
Organisms to maintain homeostasis
picks up signals and tells body what to do
What are the three components of feedback loops
Receptors
Control centre
Effector
What is the receptor
Group of cells around the body detect stimuli
Skin detects cold
What is the control centre
Receives and process information from the response
Hypothalamus
What is the effector
Bring about response to restore optimum levels
Shivering
What does the body detect
Changes and then responds to correct them to a set point by mechanism known as negative feedback
What is endotherms
Regulate own constant body temperature
Most mammals
Negative feedback loop
What do each species have
Own body temperature which feedback initiates and must be maintained constant
How does the body maintain temperature
Thermoreceptors detect body temperature
Thermoregulatory centre which is where the hypothalamus receives and process information from receptor
Effector is different mechanisms bring about changes to bring back body temperature
What is the hyperthalamus
Control centre for homeostasis and responsible for thermoregulatory, osmoregulation and release of hormones from pituitary gland
What happens when animals gets to hot
Heat loss centre is activated
What happens when animals gets to cold
Heat gain centre is activated
Fill in blanks
A change in temperature stimulates ….. which trigger action potentials to relate information via sensory neurons to the ……
Here the hypothalamus sends information via motor neurons to the …… (skin, muscles or glands)
Response occurs such as …… and …… of arterioles to allow heat to escape from skin if body is too ……..
Response stops when hypothalamus detects that temperature has returned to set point
Thermoreceptors
Hypothalamus
Effectors
Sweating
Vasodilation
Hot
