B10 - Biological Responce Flashcards
What is homeostasis
It is the regulation of the conditions inside the body to maintain a stable intermal enviroment
How do the 3 main components maintain steady condition inside the body?
Receptors, detect a stimulus level to high/low. Coordination sentres, receives and processes the information, then organises a responce. Effectors, produces a responces which counteracts the change and respored body go optimum level.
How does negative feedback work?
When the level or something gets too high or too low your body uses negative feedback to bring it back to normal
What are the factors that effect reaction time
Age, gender and drugs
How does caffiene effect someones reaction time
It speeds up their reaction time
How do reflexes work?
electrical impulse passes from receptor along sensory neurone to CNS. Goes to relay neurone and back along motor neuron.
Called reflex ark
What are synapses
Synapses are the junctions between neurons in which chemicals are transmited to carry on the electrical impulse.
How does the reflex arc work
Sensory receptor detects stimulus. Electrical impulse sent across sensory neurone, to the relay neurone. It moves across the motor neurone and to the motor end plate making muslce contracts and withdraws
