Certain Changes Stimulate Chemoreceptors in the Aorta and Carotid Bodies

question 21

Multiple Choice

Certain changes stimulate chemoreceptors in the aorta and carotid bodies to prepare the fetus for initiating respirations immediately after birth.Which change in fetal physiologic activity is not part of this process?

• A) Fetal lung fluid is cleared from the air passages during labor and vaginal birth.
• B) Fetal partial pressure of oxygen (PO₂)decreases.
• C) Fetal partial pressure of carbon dioxide in arterial blood (PaCO₂)increases.
• D) Fetal respiratory movements increase during labor.

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Definitions:

Organisms

Living beings that carry out essential life processes such as growth, reproduction, and metabolism.

Stimulus

An external or internal event or occurrence that elicits a response from a cognitive system or organism.

Concurrent Interference Theory

A theory suggesting that the ability to learn or recall information can be hindered by simultaneous processing of competing information.

Nausea Inducing Substance

refers to a material or compound that causes a feeling of sickness or urge to vomit upon ingestion or exposure.