Using Lectures to Identify Student Misconceptions: A Study on the Paradoxical Effects of Hyperkalemia on Vascular Smooth Muscle

Autor/inn/en	Bordes, Stephen, Jr.; Gandhi, Jason; Bauer, Blake; Protas, Matthew; Solomon, Nadia; Bogdan, Lukasz; Brummund, Dieter; Bass, Brittany; Clunes, Mark; Murray, Ian V. J.
Titel	Using Lectures to Identify Student Misconceptions: A Study on the Paradoxical Effects of Hyperkalemia on Vascular Smooth Muscle
Quelle	In: Advances in Physiology Education, 44 (2020) 1, S.15-20 (6 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Bordes, Stephen, Jr.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1043-4046
DOI	10.1152/advan.00030.2019
Schlagwörter	Misconceptions; Medical Students; Human Body; Audience Response Systems; Student Evaluation; Physiology; Scientific Concepts; Foreign Countries; Grenada + Suchen Sie Ihr Suchwort? Missverständnis; Menschlicher Körper; Schulnote; Studentische Bewertung; Physiologie; Ausland
Abstract	Medical students have difficulty understanding the mechanisms underlying hyperkalemia-mediated local control of blood flow. Such control mechanisms are crucial in the brain, kidney, and skeletal muscle vasculature. We aimed to identify medical students' misconceptions via assessment of students' in-class knowledge and, subsequently, improve future teaching of this concept. In-class polling was performed with the TurningPoint clicker response system (n = 860) to gauge students' understanding of three physiological concepts related to hyperkalemia: membrane potential (V[subscript m]), conductance, and smooth muscle response. V[subscript m] includes the concepts of equilibrium potential (V[subscript eq]) for specific ions, as well as driving force (DF = V[subscript m] - V[subscript eq]). Students understood the concept of DF (~70% answered correctly), suggesting their understanding of V[subscript m]. However, students misunderstood that hyperkalemia results in depolarization (~52% answered correctly) and leads to an increase in potassium conductance (~31% answered correctly). Clarification of the type of smooth muscle as vascular increased the percentage of correct responses (~51 to 73%). The data indicate that students lacked knowledge of specific potassium conductance in various muscle types, resulting in divergent responses, such as the canonical depolarization in skeletal muscle versus hyperpolarization in smooth muscle cells during hyperkalemia. Misunderstanding of this crucial concept of conductance is directly related to the students' performance. Furthermore, we connected the paradoxical effect of hyperkalemia to pathological acute and chronic hyperkalemia clinical scenarios. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01