Digitalis purpurea pharmacological forms, extracts of this plant did not frequently cause intoxication because they induced nausea and vomiting within minutes of ingestion, preventing the patient from consuming more. The main toxins in "Digitalis" spp. are the two chemically similar cardiac glycosides: digitoxin and digoxin. Like other cardiac glycosides, these toxins exert their effects by inhibiting the ATPase activity of a complex of transmembrane proteins that form the sodium potassium ATPase pump, (Na/K-ATPase). Inhibition of the Na/K-ATPase in turn causes a rise not only in intracellular Na, but also in calcium, which in turn results in increased force of myocardial muscle contractions.
Where Do We Go from Here: Chaos or Community? Where Do We Go from Here: Chaos or Community? Where Do We Go from Here: Chaos or Community? is a 1967 book by African-American minister, Nobel Peace Prize laureate, and social justice campaigner Martin Luther King, Jr. Advocating for human rights and a sense of hope, it was King's fourth and last book before his assassination. He spent a long period in isolation, living in a rented residence in Jamaica with no telephone, composing the book. It later lapsed out of print until Beacon Press published an expanded edition in 2010, which featured a new introduction passage by King's long-time