BIOL 142 Study Guide - Final Guide: Konstantin Mereschkowski, Lynn Margulis, Cardiac Muscle Cell
4 Jul 2018
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Lynn Margulis
endosymbiotic theory, is an evolutionary theory of the origin of eukaryotic cells from
prokaryotic organisms, first articulated in 1905 and 1910 by the Russian botanist
Konstantin Mereschkowski, and advanced and substantiated with microbiological
evidence by Lynn Margulis in 1967.
Wallace
wrote On the Tendency of Species to form Varieties; and on the Perpetuation of
Varieties and Species by Natural Means of Selection
Dobzhansky and Mayr
one of the top researchers in the world in the field of Evo-Devo (evolutionary
development)
Autorhythmic cells
cells found in the heart that are capable of spontaneously producing action potentials at
regular intervals
Functional syncytium
heart as a whole is often described as this because all cells that compose the heart are
working together to perform one function, pumping blood.
cardiac myocytes
heart muscle cells
intercalated disks
connect the cardiac myocytes to one another
Gap junctions
open spaces in the intercalated disks where the cytoplasm of one cardiac myocyte
connects to and is continuous with the cytoplasm of an adjacent cardiac myocyte
Contractile myocytes
cells that actually contract, become shorter, and function to force blood through the
chambers of the heart and arteries
Cardiac conduction system
the two types of cardiac myocytes make up this system
Sinoatrial node (SA)
cluster of cells on the right atrium near superior and inferior vena cava
known as the "pacemaker of the heart"
Atrioventricular node (AV node)
is a cluster of cells between the atria and the ventricles that transmit action potentials
from the atria to the ventricles
Atrioventricular bundle (AV bundle)
located in the interventricular septum toward the apex of the heart
action potentials travel through this after leaving the AV node
right and left bundle branches
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Document Summary
Lynn margulis endosymbiotic theory, is an evolutionary theory of the origin of eukaryotic cells from prokaryotic organisms, first articulated in 1905 and 1910 by the russian botanist. Konstantin mereschkowski, and advanced and substantiated with microbiological evidence by lynn margulis in 1967. Wallace wrote on the tendency of species to form varieties; and on the perpetuation of. Varieties and species by natural means of selection. Dobzhansky and mayr one of the top researchers in the world in the field of evo-devo (evolutionary development) Autorhythmic cells cells found in the heart that are capable of spontaneously producing action potentials at regular intervals. Gap junctions open spaces in the intercalated disks where the cytoplasm of one cardiac myocyte connects to and is continuous with the cytoplasm of an adjacent cardiac myocyte. Contractile myocytes cells that actually contract, become shorter, and function to force blood through the chambers of the heart and arteries.
