Nervous System Thinking Questions. Explain how the sense of smell relates to the sense of taste in identifying a food such as chocolate.

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Presentation transcript:

Nervous System Thinking Questions

Explain how the sense of smell relates to the sense of taste in identifying a food such as chocolate.

When saliva in your mouth mixes with the chocolate, odors travel up through the nose to the throat, and the olfactory cells are stimulated.

What is the main function of the peripheral nervous system?

To connect the central nervous system, or brain and spinal cord, with all parts of the body

Identify the following sensory receptors listed as part of the ear, eye, tongue, or nose: retina, cochlea, eardrum, olfactory cells, cones, rods, taste buds.

ear: cochlea, eardrum eye: retina, rods, cones tongue: taste buds nose: olfactory cells

If neurons don't touch each other, how do they transmit impulses to each other?

When an impulse reaches the end of an axon in one neuron, the axon releases a chemical that flows across a space between two neurons called a synapse. The chemical relays the impulse to the dendrite of the next neuron.

Explain how the eardrum aids hearing.

Sound waves cause the eardrum to vibrate. These vibrations then move through the hammer, anvil, and stirrup, and then on to the cochlea, where impulses are sent to the brain. The sounds vary according to the vibration.

You go to a doctor for a checkup. He or she uses a rubber hammer to hit your knee. Your leg jumps when the doctor hits it. Trace the path the sensory information followed when the doctor hit your knee.

The sensory neurons in your knee sent impulses to the interneurons in the spinal cord. The interneurons relayed an impulse to the motor neurons. The motor neurons transmitted a message to the muscles in your leg, and your leg moved.

Why is it an advantage to you to have reflexes?

Reflexes allow you to respond without having to think about it. They protect you from harm.

Use numbers to order the steps that occur when you run an iron over your hand accidentally. ______You aren't paying attention when you run the iron over your hand. ______Muscles of your hand contract, responding to the impulses. ______Interneurons relay impulses to motor neurons. ______Motor neurons relay impulses to muscles of your hand. ______Sensory neurons in your hand send messages to interneurons. ______You pull your hand away from the iron and scream.

1, 5, 3, 4, 2, 6