Nervous system

Specialized cells that help you gather information about your environment and react to it

• neurons

• Muscle cells

• Cartilage cells

which of the following are the parts of neurons?

• brain –spinal cord and vertebrae column

• Dendrite –axon and cell body

• sympathetic and parasympathetic

Receive signals called impulses from other neurons and conduct the impulse to the cell body

• Dendrite

• cell body

• -axon

The nucleus of the neuron and many of the cell organelles are found in the

• Dendrite

• cell body

• Axon

neurons Send impulse from receptors in the skin and sense

organs to the brain and spinal cord

• Sensory neurons

• inter neurons

• motor neurons

Nerve pathway that consist of a sensory neuron, an inter neuron, and a motor neuron is called…

• Reflex arc

• Nerve

• Neurons

when the neuron at rest,……………

• more sodium ions (Na) outside the cells than inside the cell

• it is conducting an impulse

• more potassium ions outside the cell

Sodium -potassium pump (pump ) ......Na ions outside the cell

• 3

• 2

• 5

when neuron at rest the outer membrane is………..

• Positive

• Negative

The sodium potassium pump ,pumps

• sodium ions out and potassium ions inside

• sodium ions in and potassium ions out

• sodium and potassium ions in