Biology 21-Human Physiology Cardac Name Lab Day 1. Wnite the number (1-18) for e
ID: 3478178 • Letter: B
Question
Biology 21-Human Physiology Cardac Name Lab Day 1. Wnite the number (1-18) for each of the following characteristics in the proper columns below Keep in mind, some of these are used in more tan ono column, 1. Cels communicate through gap junctions 2 Cells do not communicate through gap 10. Repolarization in action potential resuts from junctions 3. Contractile proteins 4 No contractile proteins 5. Depolarization in action potential resuits 11. Self-stimulated (autorhythrnic) 12. Stimulated by nodal cels 13. Stimulated by the nervous system onily 14. Threshold stimulus occurs via a pacemaker ential from increased calcium permeability 6. in action potential resuts 15. Threshold stimulus occurs via chemically gated from increased sodium permeability 7. Extended refractory period 6. Normal refractory penod sodium channels 16. Threshold stimulus occurs via ion currents through gap junctions 17 Uses extracellular calcium for contraction 18. Uses stored calcium for contraction 9. Has a Plateau phase Skeletal Myofibers -Contractie My card alCels Nodal My cardialCells- 2. Which characteristics listed above are unique to skeletal myofibers 3. Which characteristics listed above are unique to contractile myocardial cells 4. Which characteristics listed above are unique to nodal myocardial cells 5. Which characteristics listed above do both skeletal muscle and contractile myocardial cells share 6 Which characteristics listed above do both contractile and nodal myocardial cells shareExplanation / Answer
2. Characteristics unique to skeletal myofibrils
Cells do not communicate through gap junctions, Stimulated by the nervous system only, Threshold stimulus occurs via chemically gated ion channels.
3. Characteristics unique to contractile myocardial cells
Extended refractory period, Has a plateau phase, Stimulated by nodal cells, Threshold stimulus occurs via ion current through gap junctions, Uses extracellular calcium for contraction.
4. Characteristics unique to nodal myocardial cells
No contractile protein, Depolarization in action potential results from increased calcium permeability, Self-stimulating (autorhythmic), Threshold stimulus occurs via a pacemaker potential.
5. characteristics do you both skeletal muscle and contractile myocardial cells share
contractile proteins, depolarization in action potential results in increased sodium permeability, repolarization in action potential results from increased potassium permeability, uses stored calcium for contraction.
6. characteristics do you both contractile and nodal myocardial cells share
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