3.2 Stimulus response and negative feedback Flashcards
What are sensory receptors?
Sensory receptors translate the physical and chemical properties of stimuli into patterns of nerve impulses that are transmitted to the brain.
What is the process of negative feedback?
A mechanism of homeostasis which helps return a variable back to tolerance range by reducing original stimulus.
What are 5 common sensory receptors?
- Mechanoreceptors
- Chemoreceptors
- Electromagnetic receptors
- Nociceptors
- Thermoreceptors
What are the 4 types of effectors?
- Thermoregulation
- Osmoregulation
- Glucoregulation
- Chemoregulation
What is an effector?
Effectors facilitate a response and are the result of stimulating the sensory receptor.
What is a stimulus response model?
A mechanism of homeostasis which is the process of detecting an internal condition and then responding to it.
What does an effector facilitate?
facilitates the response required to maintain homeostasis.
What is often present in a negative feedback system?
Hormones
What receptor can sense physical deformation caused by pressure, touch, stretch motion or sound?
Mechanoreceptors.
What does thermoregulation cause?
The skeletal muscles to shiver in order to increase body temp.
What is a nociceptor?
A receptor that detects painful stimuli that may damage body tissues, triggering defense reaction.
What receptor senses changes in temperature in both internal and external environment?
Thermoreceptor.
What effector stimulates the pituitary gland to secrete ADH to increase water absorption?
Osmoregulation.
What receptor can detect electromagnetic energy such as light, electricity and magnetism?
Electromagnetic receptors.
What effector activates the pancreas to secrete insulin to lower blood sugar level?
Glucoregulation.
