Chapter 10: Neutral Homeostasis control pathways Flashcards
What is a neuron?
A nerve cell that transmits electrical impulses
What is a sensory neutron?
A cell that transmits nerve impulses from the receptor to the central nervous system
What is CRS?
Central nervous system
What is the path for nerve impulses to travel along?
From the source of stimulation, along sensory neuron, to the CNS, to the interconnecting neurons to the appropriate motor neuron to the effector.
Sensory neurons
Add picture, have multiple receptors on the dendrite that can send individually for fine tuned detection. These neurons are responsible for feeding every piece of information the to brain
Motor Neurons
add picture, axon is different for depending of the effector linked
interneurons
add picture
What is a dendrite?
Extension of the neuron which convers external signals into never impulses
What is a soma?
The main cell body of the neuron
What is an axon?
tubular extension of a neuron that conducts the nerve impulse
What is resting potiential?
The state of a neural cell at rest, outside is more positive then inside. The pump is pumping 3 sodium for every 2 potassium which results in the inside being more positive
What is action potential?
The state of a neural cell in active state, the inside is more positive then the outside. The membrane becomes permeable to sodium so if diffuses resulting in a less positive inside
What is depolarisation?
A change is cell’s membrane potential so the inside is less negative
What is an electrical impulse?
Sodium ions change in external and internal environments.
What is a sodium-potassium pump?
A pump, which depending on the membrane, pumps 3 sodium for every 2 potassium
What is synapse?
The tiny space between axon terminal and its target
What is presynaptic neuron?
The neuron sending its signal across the synpase
What is postsynaptic neuron?
The neuron being received signal from across the synaptic
What is a neurotranmitter?
a hormone used by neurons to carry a signal across the synaptic and stored in vesicles
How do impulses travel across the synpatic?
The impulse arrives, causing the calcium ion channels to ion, resulting in calcium ion influx, which stimulates exocytosis, the vesicle fuses to the presynaptic membrane and the release of the transmitter hormone and diffuses to bind with specific receptors.
