How it Works
Try Naxlex NCLEX-RN (Free-Trial)

Where are sensory signals from the stomach and small intestine sent to trigger a vomiting reflex?

A.

Cerebrum

B.

Esophagus

C.

Pharynx

D.

Medulla oblongata

Answer and Explanation

The Correct Answer is D

A. Cerebrum:  the cerebrum is involved in conscious processing; vomiting reflex is coordinated by brainstem centers.
B. Esophagus:  the esophagus is a peripheral organ and a route for vomitus, not the control center for the reflex.
C. Pharynx:  the pharynx is an anatomical structure involved in expulsion but not the central integrative center for vomiting.
D. Medulla oblongata:  the medulla oblongata (brainstem vomiting center and chemoreceptor trigger zone nearby) integrates visceral sensory input and coordinates the vomiting reflex.


Get 100+ Naxlex Exit Exams for $79 Try Naxlex NCLEX-RN (14 Day Free-Trial)

Naxlex Comprehensive Predictor Exams

Free Nursing Study Resources

Related Questions

Correct Answer is A

Explanation

A. QRS complex: The QRS represents the rapid depolarization of the right and left ventricles (electrical activity that triggers ventricular contraction).
B. T wave: The T wave represents ventricular repolarization (the ventricles recovering electrically), not depolarization.
C. P wave: The P wave represents atrial depolarization, the electrical activation of the atria.
D. PQ segment: The PQ (PR) segment is the brief isoelectric period while the impulse travels through the AV node/AV bundle (a conduction delay), not ventricular depolarization.

Correct Answer is D

Explanation

A. It carries oxygen-poor blood to the tissues: That’s the systemic circuit's function (to deliver oxygen to tissues via arterial blood), so incorrect.
B. It carries oxygen-poor blood to the heart: Venous return from tissues brings oxygen-poor blood back to the heart, but the pulmonary circuit specifically moves blood from the heart to the lungs -so this is misleading/incorrect.
C. It carries oxygen-poor blood from the tissues: The systemic veins do that; the pulmonary circuit carries blood from the heart to the lungs, not directly from tissues.
D. It carries oxygen-poor blood to the lungs: Pulmonary circuit transports deoxygenated blood from the right ventricle to the lungs for oxygenation.

Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.

Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today

Register