Pop Quiz - Nervous System

These are the questions for the pop quiz I have on Friday. They are on Nervous system.

10 cards   |   Total Attempts: 183
  

Cards In This Set

Front Back
What is a stimulus?
Stimulus - any change or signal in the environment that can make the organism react
What is the function of an axon?
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.
What are three functions of the nervous system?
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.
Giva an example of a stimulus and describe how the nervous system produces a responce.
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.
Your heart rate is controlled by involuntary actions of the nervous system. What would life be like if your heartbeat were under voluntary control?
Then you would get really tired because you would have to control your heart.
Identify the three kind of neurons that are found in te nervous system.
Sensory neuron, interneuron, motor neuron.
How do the three kinds of neurons interact to carry nerve impulses?
· 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.
How do sensory neurons and motor neurons differ?
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.
What is a synapse?
Synapse -the junction where one neuron can transfer an impulse to another structure
Outline the steps by which a nerve impulse reaches and then crosses the gap at a synapse.
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.