Q:

What is the primary stimulus for breathing?

A:

Quick Answer

The primary stimulus for breathing is the bronchioles in the lungs reacting to a build-up of carbon dioxide. When carbon dioxide levels are too high, the body reacts by taking in oxygen and expelling carbon dioxide.

Continue Reading

Full Answer

Breathing can be manually controlled by the body to a point. When carbon dioxide levels rise too high and reach the medulla oblongata, the body involuntarily takes a breath. Cellular respiration produces carbon dioxide at a faster rate than oxygen production. This causes the lungs to respond through increased ventilation, providing an additional oxygen supply.

Carotid bodies in the carotid artery respond to changes in environmental oxygen loss when the carbon dioxide levels remain unchanged. They help regulate breathing to provide the necessary amount of oxygen to survive in oxygen-sparse environments.

Learn more about Zoology
Sources:

Related Questions

  • Q:

    What is the major function of hemoglobin?

    A:

    The major function of hemoglobin is to transport oxygen from the lungs to the body's tissues and then transport carbon dioxide out of the tissue back to the lungs. Each red blood cell contains approximately 280 million hemoglobin molecules.

    Full Answer >
    Filed Under:
  • Q:

    What happens in the alveoli?

    A:

    The exchange of carbon dioxide and oxygen occurs in the alveoli of the lungs. Oxygen is taken into the body through the process of inhalation while carbon dioxide is eliminated through exhalation.

    Full Answer >
    Filed Under:
  • Q:

    What is the main function of the alveoli?

    A:

    The main function of the alveoli is the exchange of carbon dioxide for oxygen in the lungs. Alveoli are small air sacs of the respiratory system. For this gas exchange to occur, air must travel through different parts of the respiratory system.

    Full Answer >
    Filed Under:
  • Q:

    How do fish gills work?

    A:

    Fish gills act as the equivalent of a mammal's lungs by taking in oxygen and releasing carbon dioxide. Oxygen and carbon dioxide travel across small, thin-walled blood vessels in both lungs and gills. In terms of evolution, gills are significantly older than lungs.

    Full Answer >
    Filed Under:

Explore