Acid reflux into the esophagus ("heartburn") is the glomerular filtrate by the__________.

esophageal glands

pharyngeal constrictors

the lower esophageal sphincter (LES)

the upper esophageal sphincter

Answer and Explanation

The Correct Answer is C

A. Esophageal glands secrete mucus to lubricate the esophagus, but they do not cause acid reflux.

B. Pharyngeal constrictors are muscles that help in the swallowing process, not in preventing acid reflux.

C. The lower esophageal sphincter (LES) is a ring of muscle that controls the passage of food from the esophagus to the stomach. If the LES is weakened or relaxes inappropriately, stomach acid can flow back into the esophagus, causing acid reflux or "heartburn."

D. The upper esophageal sphincter controls the passage of food from the pharynx into the esophagus, but it is not involved in preventing acid reflux.

Nursing Test Bank

Quiz #1: RN Exams Pharmacology Exams Quiz #2: RN Exams Medical-Surgical Exams Quiz #3: RN Exams Fundamentals Exams Quiz #4: RN Exams Maternal-Newborn Exams Quiz #5: RN Exams Anatomy and Physiology Exams Quiz #6: RN Exams Obstetrics and Pediatrics Exams Quiz #7: RN Exams Fluid and Electrolytes Exams Quiz #8: RN Exams Community Health Exams Quiz #9: RN Exams Promoting Health across the lifespan Exams Quiz #10: RN Exams Multidimensional care Exams

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

Naxlex Comprehensive Predictor Exams

Quiz #1: Naxlex RN Comprehensive online practice 2019 B with NGN Quiz #2: Naxlex RN Comprehensive Predictor 2023 Quiz #3: Naxlex RN Comprehensive Predictor 2023 Exit Exam A Quiz #4: Naxlex HESI Exit LPN Exam Quiz #5: Naxlex PN Comprehensive Predictor PN 2020 Quiz #6: Naxlex VATI PN Comprehensive Predictor 2020 Quiz #8: Naxlex PN Comprehensive Predictor 2023 - Exam 1 Quiz #10: Naxlex HESI PN Exit exam Quiz #11: Naxlex HESI PN EXIT Exam 2

Free Nursing Study Resources

Correct Answer is False

Explanation

The embryonic stage extends from 16 days through the end of week 8.

A. The placenta is the organ that provides fetal nutrition, gas exchange, and waste removal. It also secretes hormones such as human chorionic gonadotropin (hCG), progesterone, and estrogen, which are essential for maintaining pregnancy and supporting fetal development. B. The blastocyst is the early stage of the embryo that implants into the endometrium, but it does not provide fetal nutrition or secrete pregnancy-regulating hormones. C. The myometrium is the muscular layer of the uterus responsible for contractions during labor, but it does not provide fetal nutrition or secrete hormones.

Correct Answer is D

Explanation

A. Ca2+: prevents the entrance of any more sperm- While calcium ions play a role in the slow block to polyspermy, the fast block involves sodium ions.

B. Na+: prevents the entrance of more Na- The fast block to polyspermy involves sodium ions (Na+), but the depolarization of the egg membrane prevents the entrance of more sperm, not just more Na+.

C. Na+: prevents the entrance of Ca2+. The fast block prevents additional sperm from entering, not calcium ions.

D. Na+: prevents the entrance of any more sperm: The fast block to polyspermy involves the opening of sodium ion channels, leading to depolarization of the egg membrane. This depolarization prevents other sperm from binding to and penetrating the egg.

View Question and Answer

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

Acid reflux into the esophagus ("heartburn") is the glomerular filtrate by the__________.

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The embryonic stage extends from 16 days through the end of week 8.

Correct Answer is False

Explanation

A. The endometrium is the inner lining of the uterus that supports the embryo after implantation, but it does not provide direct fetal nutrition or secrete hormones for fetal development.

Correct Answer is D

Explanation

What is the principal cation of the ECF?

Glycolysis and aerobic respiration collectively produce up to ___________ ATP per glucose, whereas anaerobic fermentation produces __________________.

Which of the following constitutes the so-called bad cholesterol?

In the blastocyst, the trophoblast will become__________ whereas the embryoblast (inner cell mass) will become __________.

What is the infant's only source of nutrition during the first 2-3 days postpartum?

Which of the following is not a function of gastric hydrochloric acid (HCI)?

The ______________is the gonad analogous to ovary?

Women have a tendency to retain water during part of the menstrual cycle because estrogen mimics the action of what?