Question

Uestion 1 (2 points) Question 1 Saved

Which part of a neuron receives and transmits stimuli towards the cell body?

Question 1 options:

Axon


Myelin sheath


Olfactory


Dendrite

Question 2 (2 points) Question 2 Saved
What does not move across axons?

Question 2 options:

electrons


ions


electrons and ions


neither electrons nor axons

4.10 Quiz: Nervous System Pool 2
Question 3 (2 points) Question 3 Saved

A nerve signal is like a wave. How does this work?

Question 3 options:


A wave of movement passes down the axon, in which the whole axon moves sideways in one place and then the next.


The density of the cytoplasm inside the axon changes from one place to the next as the signal moves along the axon.


A wave of reversal of the negative electrical potential inside the cell passes along the axon with ions moving in and out of the axon.


An electrical wave moves down the axon by electrons moving from the place the signal started to the place it ends up.

Question 4 (2 points) Question 4 Unsaved
Jackie slept on her side and had her arm under her pillow. When Jackie woke up, her arm was numb and she could not feel her fingers. Based on your understanding of the nervous system, which of the following best explains the sensation Jackie is feeling in her arm?

Question 4 options:

Her brain has not sent any electrical signals to her arm to wake up yet.


branch of nervous tissue was compressed, so electrical signals could no longer travel through her arm.


The electrical signals carried by the neurons were not active while she was sleeping.


Electrical signals can only travel vertically due to gravity.

4.10 Quiz: Nervous System Pool 3
Question 5 (2 points) Question 5 Unsaved
Tavi was running at a fast pace in a marathon. Which of the following describes how the Tavi’s nervous system worked with his circulatory system to help him to maintain homeostasis?

Question 5 options:

The brain sends signals to the veins to decrease the blood pressure to the legs so that muscles have less mass.


The heart sends signals to the brain, which then releases a hormone that causes the blood flow to decrease to the stomach.


The brain sends signals to the blood vessels in the legs to dilate, so that there is increased blood flow.


The brain informs the heart to decrease it’s rate of pumping, in order to slow the flow of blood during exercise.

Answer 1

1. Axon

2. Electrons

3. A wave of reversal of the negative electrical potential inside the cell passes along the axon with ions moving in and out of the axon.

4. branch of nervous tissue was compressed, so electrical signals could no longer travel through her arm.

5. The brain sends signals to the blood vessels in the legs to dilate, so that there is increased blood flow. (This one seems the most accurate)

Answer 2

1. Dendrite

2. Electrons

3. A wave of reversal of the negative electrical potential inside the cell passes along the axon with ions moving in and out of the axon.

4. branch of nervous tissue was compressed, so electrical signals could no longer travel through her arm.

5. The brain informs the heart to decrease it’s rate of pumping, in order to slow the flow of blood during exercise

Dendrite is a short, branched protoplasmic projection of a nerve cell which receives, process, and transmits information (signals) from other neurons towards the body of the cell or soma. The transmission of signals from one neuron to another is accomplished through chemical signals and electric impulses.

An electron is a subatomic particle that has a negative charge. Electrons are found in all atoms and functions as the main carrier of electric current in solids. Electrons do not move across axons.