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Homeostasis - Coggle Diagram
Homeostasis
Explain how we pick up sensory information from our environment and respond to it
Sensory receptors
An organism and its cells receive many different types of information and this means receptors come in all shapes and sizes and are categorized by the type of stimulus they detect. Signals may come from the external environment or other parts of the organism or within the cell. Stimuli may be physical, light,heat,pressure, or chemical hormones, neurotransmitters.
Receptors are grouped into five main categories; chemoreceptors, mechanoreceptors, photoreceptors, thermoreceptors and nociceptors.
Chemoreceptor
A detector that detects a chemical stimulus such as oxygen concentration and pH
Mechanoreceptor
A detector that detects a physical stimulus such as touch and sound
Photoreceptor
A detector that detects light
Thermoreceptor
A detector that detects changes in temperature
Nociceptor
A detector that detects only intense (painful), chemical mechanical or thermal stimulation
Exteroceptor
A receptor that specifically receives signals from outside the body, such as air or temperature painful pressure or smells.
Describe the different types of feedback systems in the body
The stimulus response model
→Processing center- Assesses conditions relative to optimal levels→Effector initiates appropriate response→Receptor detects environmental conditions (Stimulus)
Feedback mechanism
A process that monitors environmental conditions usually but not necessarily in reference to biological systems
Stimulus response model
A model thats shows how organisms respond to stimuli
Stimulus
A signal that causes a response
Receptor
A structure that causes a response
Processing center
The organ or organ system, usually the central nervous system that receives signals from receptors and sends appropriate responses to effectors.
Response
The action resulting from a stimulus
Effector
An organ cell or protein that acts in response to a stimulus
Negative feedback
A cyclic process where responses counteraract disturbances to keep concentrations of substances within narrow limits for optimal cellular functioning
Positive feedback
A cyclic process where responses reinforce and strengthen disturbances to normal cellular function