Cardiovascular System
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| What materials are transported by the cardiovascular system? | show 🗑
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| Materials entering the body. | show 🗑
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| Materials moved from cell to cell. | show 🗑
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| show | Metabolic wastes go from all cells to kidneys.Heat goes from all cells to skin.Carbon dioxide goes from all cells to lungs.
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| Describe the general route of blood flow through the heart and body. | show 🗑
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| show | The blood vessels that go from the right ventricle to teh lungs and back to the left atrium.
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| Systemic Circulation | show 🗑
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| show | The right side of the heart receives blood from the tissues and sends it to the lungs for oxygenation.
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| show | The left side of teh heart receives newly oxygenated blood from the lungs and pumps ito to tissues throughout the body.
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| What are intercalated discs in cardiac muscle tissue? | show 🗑
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| How do they aid cardiac muscle contraction? | show 🗑
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| show | Autorhythmic and contractile.
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| What are Autorhythmic cells? | show 🗑
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| What are "If channels? | show 🗑
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| show | If chnl open @ - MP Na+ inflx exceeds K+ eflx.Net inflx of + chrg slowly depol.the A-cell. MP = + the If chnl close & Ca2+ open. Ca2+ inflx cont to depol. & the MP move to TH, then more Ca2+ chnl open. Ca2+ rush in cell = the steep depol. phase of the AP
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| show | When the Ca2+ channels close at the peak of the Action Potential, K+ channels slowly have opened. The Reolarization phase of the Autorhythmic Action Potential is due to the resultant efflux of K+
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| show | When there is a lenthening to the AP caused by Ca2+ entry.
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| Describe how a Contractile cell is depolarized. | show 🗑
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| show | Voltage gated Ca2+ chnl open & enter cell, @ same K+ chnl close.The combo of Ca2+ infx & decreased K+ eflx causes the AP to fltn into a plateau. The Plateau ends when Ca2+ chnl close & K+ perm ^ again. When K+ chnl open K+ exit fast,& returns cell to RP.
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| show | The HR is influenced by antagonistic control. The Para. actions slow HR & Sym. actions speed HR. Tomic control of HR is dominated by the Para. brance when all Para & Sym. input is blocked the spontaneous Depolarization rate of the SA node is 90-100 bpm
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| How is the heart rate influenced by the Parasympathetic Nervous system? | show 🗑
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| How is the heart rate influenced by the Sympathetic Nervous System? | show 🗑
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| show | Medulla Oblongata.
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| How is Cardiovascular control influenced by the sympathetic nervous system? | show 🗑
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| show | An efferent pathway through parasympathetic neurons, Effector cells Muscarinic receptors of Autorhythmic cells, and Tissue response of ^ K+ efflux and decreased Ca2+ influx, a decrease hyperpolarized cell and rate of depolarization, & decreased heart rate
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lavy1318
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