Pop Quiz - Nervous System

Stimulus - any change or signal in the environment that can make the organism react

Axon – carries impulses away from the cell body. It can have more than one tip, so the impulse can go to more than one other cell.

Receives information about what is happening both inside and outside your body. Directs the way in which your body responds to this information. In addition, your nervous system helps maintain homeostasis.

One of the examples of a stimulus would be a buzzing fly. After your nervous system analyzes the stimulus, it causes a responce - you swat at the fly.

Then you would get really tired because you would have to control your heart.

Sensory neuron, interneuron, motor neuron.

· Sensory neuron picks up stimuli from the internal or external environment and convents each stimulus into a nerve impulse. The impulse travels along the sensory neuron until it reaches an interneuron, usually in the brain or spinal cord. · Interneuron carries nerve impulses from one neuron to another. Some interneurons pass impulses from sensory neurons to motor neurons. · Motor neuro sends an impulse to a muscle or gland, and the muscle or gland reacts in response.

Sensory neuron picks up stimuli from the internal or external environment and convents each stimulus into a nerve sends an impulse to a muscle or gland, and the muscle or gland reacts in response.

Synapse -the junction where one neuron can transfer an impulse to another structure

For a nerve impulse to be carried along at a synapse, it must cross the gap between the axon and the next structure. The axon tips release chemicals that carry the impulse acoss the gap.