Question

help me with these question

Which part of a neuron receives and transmits stimuli towards the cell body?
Question 1 options:


Olfactory


Dendrite


Myelin sheath


Axon

What does not move across axons?
Question 2 options:


ions


electrons


neither electrons nor axons


electrons and ions

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 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 veins to decrease the blood pressure to the legs so that muscles have less mass.


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


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

Answer 1

1. The dendrite receives the stimuli and moves it to the cell body.

2. Ions move across the axon, Na+ and K+ in particular. I am confused on the third choice for this question though.

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

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