Predict what would happen to the tidal volume and inspiratory reserve volume if the phrenic nerves were severed. Which muscles would contract to try to compensate for this?

Video transcript

Hey, everyone. Let's take a look at this question together. What is the contribution of the frantic nerve to the process of respiration? Is it answer choice, a relaxation of the intercostal muscles? Answer choice B, contraction of the diaphragm. Answer choice, D, relaxation of the accessory muscles or answer choice D, all of the above. Let's work this problem out together to try to figure out which of the following answer choices best explains how the frantic nerve contributes to the process of respiration. So in order to solve this question, we have to recall what we know about the functions of the Frenn nerve and the process of respiration. And we know that the Fren nerve plays a critical role in the respiratory system to aid breathing. And the Fren nerve aids breathing by providing motor function to the diaphragm. As the Fren nerve sends signals that cause the diaphragm to expand and contract, allowing the lungs to inhale and exhale air, which is how the Fren nerve contributes to the process of respiration. So looking at our answer choices, we can identify answer choice B contraction of the diaphragm as the correct answer and all other answer choices are incorrect as they do not explain how the fren nerve contributes to the process of respiration, which is the contraction of the diaphragm. I hope you found this video to be helpful. Thank you and goodbye.