B10 Flashcards
What part of the brain monitors the fall in core body temperature
Thermoregulatory centre
What is homeostasis
This is the regulation of internal conditions of a cell or organism to maintain optimum conditions for functions, in response to internal and external conditions.
What does homeostasis do for the human body
Control of blood glucose concentration
Body temperatures
Water levels
What does all control systems have
Receptors
Coordination centres
Effectors
What corse does homeostasis take
Stimulus-receptor-CNS-effector-response
Why are reflexes important
They produce a rapid response that’s automatic and don’t involve the conscious part of your brain.
Reflex’s take a different path way what is it?
Receptor-sensory neurone-(synapse)-relay neurone-(synapse)-motor neurone-effector
An electrical impulse passes from a receptor through the sensory neurone. At the end of the sensory neurone there is a junction called a synapse where a chemical is realised and is diffused to the relay neurone in the CNS. It then passes along the relay neurone (spinal cord) and then there is another synapses where a chemicals released and diffused to the motor neurone. The impulses arrives to the effector which is a reflex arc and this causes the muscles to contract.
How do synapses work
Your neurones aren’t joined directly to each other. Synapses are gaps between the neurones so it’s important for electrical impulses to pass from 2 neurones.
What route does the nervous system take
Once the sensory receptors detect the stimulus the information is sent an electrical impulse that passes along the neurones. The impulses travels along the neutron till it meets the CNS which is made of brain and spinal cords. Motor neurones carry information from the CNS to the rest of the body the impulses are carried to the body and the effectors respond. Effectors are muscles or glands muscles respond by contracting whereas glands secrete chemical substances.
