Biology: The Human Nervous

Homeostasis is the [blank_start]regulation[blank_end] of the [blank_start]internal[blank_end] conditions of a cell or organism to maintain [blank_start]optimum[blank_end] conditions for function, in [blank_start]response[blank_end] to internal or [blank_start]external[blank_end] changes.

What controls all the functions in a cell?

What internal conditions are controlled by homeostasis?

Stimulus —> [blank_start]Receptor[blank_end] —> [blank_start]CNS[blank_end] —> [blank_start]Effector[blank_end]

[blank_start]Receptor[blank_end] —> [blank_start]Sensory[blank_end] neurone —> [blank_start]CNS[blank_end] —> [blank_start]Motor[blank_end] neurone —> [blank_start]Effectors[blank_end]

How can you test responses in people?

Reflexes [blank_start]don’t[blank_end] involve the conscious part of the brain.

[blank_start]Stimulus[blank_end] —> [blank_start]Receptor[blank_end] —> [blank_start]Sensory[blank_end] neurone —> [blank_start]Relay[blank_end] neurone —> [blank_start]Motor[blank_end] neurone —> [blank_start]Effector[blank_end] —> [blank_start]Response [blank_end]

Synapses- [blank_start]junctions[blank_end] between neurones - electric impulses [blank_start]travel[blank_end] along them - the [blank_start]diffusion[blank_end] often chemical across the synapse is [blank_start]slower[blank_end] than the electric impulse in neurones