Question

1. practice: understanding the nervous system

self assessment

1. practice: understanding the nervous system

respond to the following based on your reading.
question 1
describe how a nerve impulse affects a neuron, travels the length of a neuron, and how the neuron recovers to be ready for the next nerve impulse it receives.
check my answer
question 2
explain what happens in the nervous system when you touch a hot pan in the kitchen. your explanation should begin with the perception of temperature and end with pulling away your hand.

Explanation:

For Question 1: A nerve impulse causes a change in the neuron's membrane potential, triggering an action - potential that travels along the axon. After the impulse passes, the neuron repolarizes through the action of ion channels to return to its resting state.
For Question 2: When you touch a hot pan, temperature - sensitive receptors in the skin detect the heat and generate nerve impulses. These impulses travel through sensory neurons to the spinal cord. In the spinal cord, the impulses are processed and sent via motor neurons to the muscles in the hand, causing the hand to pull away.

Answer:

Question 1: A nerve impulse depolarizes the neuron's membrane, generating an action - potential that travels along the axon. After the action - potential, the neuron repolarizes using ion channels to return to its resting state for the next impulse.
Question 2: Temperature - sensitive receptors in the skin detect heat and send nerve impulses through sensory neurons to the spinal cord. The spinal cord processes the impulses and sends signals via motor neurons to the hand muscles, causing the hand to pull away.