Neurons

Question 1

Diagram of a neuron starting at the dendrites

Answer 1

Dendrites
Cell body
Nucleus
Axon
Schwan’s cells
Nodes of Ranvier
Axon terminals
Synaptic cleft

Question 2

How nerve impulses are transmitted

Answer 2

When the dentrite(takes in signal) or cell body is stimulated, it changes the permeability of the cell membrane. Cause NA+ to be permeable to the cell membrane. This rush of NA+ causes voltage gated channels to allow even more NA+ to go into the inside of the neuron. This makes the interior positive and extior negative. This rise in voltage cause more channels to open until the action potential reaches the synaptic cleft.

Question 3

Myelin shealth

Answer 3

An insulating layer that forms around nerves. Allows electrical impulses to jump along nodes of the Axon. To move quicker

Question 4

3 types of neurons

Answer 4

Sensory-transmit impulse from sensory cells to CNS or motor neurons

Motor- Transmit impulse from CNS or sensory neurons to affect cells or organs

Internerouns- Connect sensory neurons to motor neurons

Question 5

Synapse

Answer 5

Neurons are connected to century/affector/and each other by synapse.

Junction between dendrites.

a space Containing a salt/ion solution which allows the impulse to cross.