Weegy: What happens when the lungs recoil? A. Ribs and diaphragm muscles contract. B. Expiration occurs. C. Inspiration occurs. D. Internal respiration occurs.
D. Internal respiration occurs.
User: Which one of the following events occurs first in a nerve impulse?
A. Sodium ions move to the inside of a neuron.
B. Potassium ions move to the outside of a neuron.
C. Sodium ions move to the outside of a neuron.
D. Potassium ions ... (More)