Quiz 5 Flashcards
(20 cards)
Responsible for establishing the resting membrane potential in neurons through movement of ions down the concentration or electrochemical gradients.
Leak or passive channels
Responsible for permitting propagation of action potentials during conduction along the length of the axon.
Voltage gated channels
Responsible for stimulating graded receptor potentials through movement of the cell or change in the shape of the cell, as in the hair cells found in the cochlea of the ear.
Mechanically gated channels
Responsible for changing the amount of ions inside the cell after chemicals such as GABA or Acetylcholine bind to their receptor on the membrane.
Chemically or ligand gated channels
Schwann Cells produce myelin which covers the axons in the central nervous system. T/F?
False
The part of neuron that is responsible for synthesis of the neurotransmitters.
nerve cell body
The part of the neuron that is responsible for receiving information from the previous neuron.
Dendrites
The part of the neuron that is responsible for transmitting the axon potential along the length of the neuron.
Axon
Protein cations in the intracellular fluid are a contributing factor in the establishment of the resting membrane potential. T/F?
False
A reduction in the number of erythrocytes and/or concentration of hemoglobin is called ____; the increased concentration of erythrocytes above normal is called ____.
anemia; polycythemia
After healing of the damaged area, clot retraction and breakup of the fibrin occurs which is called:
Fibrinolysis
Damage to a blood vessel can lead to separated/lost endothelial cells, which exposes collagen causing platelets to adhere and initiation of the coagulation cascade to form a clot.T/F?
True
Platelets attach to the exposed collagen when endothelial cells are damaged/lost, but to continue to adhere, platelets release ____ and they strongly attach to the exposed collagen to continue with the clotting cascade.
von Willebrand factor
The Vitamin K dependent clotting factors are
Factors VII, IX, X, and prothrombin
Hemoglobin is composed of 4 heme groups that each contain 1 iron atom that binds with oxygen. T/F?
True
Immature red blood cells contain ribosomes and when seen in the circulation (in a blood sample), they are
Reticulocytes
The production of erythrocytes is called _____ and is stimulated by _____ released from the kidney.
erythropoiesis; erythropoetin
The breakdown of erythrocytes leads to heme being converted into ____, which is a yellow pigment that is found in the plasma. This substance becomes conjugated in the liver to make it more water soluble to increase secretion.
Bilirubin
Iron deficiency can lead to anemia, because iron is required for the production of erythrocytes. T/F?
True
Because there is a greater concentration of Na+ in the extracellular fluid, the excitable cells, like neurons are more permeable to Na+ ions than K+ ions.T/F?
False.
