Term
| The resting potential of a cell is? |
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Definition
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Term
| If the millivolt becomes more positive, it is said to be ______________? |
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Definition
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Term
| Durring depolarization the cell becomes more permiable to? |
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Definition
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Term
| The charge on the outside the cell is _________________ compared to the inside of the cell. |
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Definition
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Term
| The difference in charge at resting potential is mostly due to _______________ located ___________________ the cell. |
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Definition
| Negative Protiens, inside |
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Term
| The absolute refractory period begins at -55 mv and ends at +30 mv. (true or False). |
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Definition
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Term
| List three differences between the action potential and the local potential? |
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Definition
| Durration of the event, The part of the membrane effected, Action potential is -55mv or higher and local potential is -56 or lower, Action potential-the cell membrane is more permeability to Na+ then local potential |
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Term
| The potassium channels open at _____mv and close at _____mv? |
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Definition
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Term
| Some _____ is always leaking out of the cell at resting potential and some ____ is always leaking in. |
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Definition
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Term
| At the end of hyperpolarization, what brings the cell back to the resting potential? |
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Definition
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Term
| A fasicle is held together or wrapped by the _____________. |
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Definition
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Term
| Many fasicles are held together by the _________________. |
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Definition
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Term
| To form whole muscle, inside a fascicle are many? |
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Definition
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Term
| The bounderies of sarcomeres are from the ________ to _______. |
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Definition
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Term
| What are the components of the actin myofiliment? |
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Definition
| Troponin complex, tropomyosin, Two strings of G-Actin called F-Actin |
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Term
| Which component of the Actin myofiliment has an affinity for calcium? |
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Definition
| One of the molecules of the troponin |
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Term
| What are the 2 special components of the myosin head? |
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Definition
| ATPase, An part with an affinity for the active site of G-Actin |
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Term
| The T-Tubules are connect the ____________ to the __________________. |
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Definition
| Sarcolemma, Sarcoplasmic Reticulum |
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Term
| Where is calcium stored within the muscle cell? |
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Definition
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Term
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Definition
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Term
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Definition
| A stimulus that produces an action potential (greater than -55mv) |
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Term
| Define Relative refractory period: |
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Definition
| When the cell is in hyperpolarization and a stronger stimulus can cause an action potential |
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Term
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Definition
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Term
| List the parts of the neuromuscular junction: |
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Definition
| Axon Terminal, pre synaptic terminal, post synaptic terminal, synaptic cleft, sarcolema |
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Term
| What is the neurotransmitter used in skeletal muscle neuromuscular junctions? |
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Definition
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Term
| In which step of muscle contraction is the energy of ATP or ADP used? |
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Definition
| When the myosin pulls the actin filament toward the center of the sarcomere. |
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Term
| In which step of muscle contraction is the presence of ATP required but not used? |
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Definition
| When the myosin head dettaches from the actin |
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Term
| The reaction of the terminal cisterna to an action potential is to? |
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Definition
| they release Ca+(calcium) |
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Term
| Muscle relaxation begins by doing what? |
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Definition
| When Ca+ (calcium)is sucked up by the sarcoplasmic reticulum and the tropomyosin blocks the active sites of the actin again. |
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Term
| The ion with the largest concentration inside the cell is? |
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Definition
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Term
| The ion with the largest concentration outside the cell is? |
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Definition
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Term
| True or False: Whe the cell is at resting membrane potential potassium does not leak out of the cell. |
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Definition
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Term
| Sodium and potssium are actively pumped in and out of the cell by what method? |
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Definition
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Term
| doing something that makes the charge MORE negative than the resting potential is called? |
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Definition
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Term
| Weak stimuli will cause depolarization only to _____ mv. |
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Definition
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Term
| -55mv depolarization is called the ___________________ and is a "magical millivolgate at which action potential begins. |
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Definition
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Term
Which represents a cell at the end of hyperpolarization? [image] |
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Definition
The one with Na+ inside and K+ outside |
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Term
| What is the functional unit of muscle contraction? |
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Definition
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Term
| Where is the protien staple that holds down the myosin? |
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Definition
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Term
| What covers the active sites on the G-Actin? |
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Definition
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Term
| What do the three glovular molecules of Troponin have an affinity for? |
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Definition
| G-Actin, tropomyacin, and Calcium |
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Term
| What is needed for a myosin head to detach from the g-Actin? |
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Definition
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Term
| What zone is gone at full contraction? |
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Definition
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Term
Identify #1 - #4 and the two types of bands [image] |
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Definition
1 - Z line, 2 - A Band, 3 - H Zone, 4 I band thick filament - Myosin thin filament Actin |
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