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What type of cell initiates the ventricular contraction signal?
Wiki User
∙ 8y ago
The pacemaker cells found within the atrioventricular node. These are actually cardiac muscles cells that beat on their own. They beat together when they touch.
Wiki User
∙ 8y ago
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What role do transcription factors play in cell?
By binding to a plasma membrane receptor it initiates a cascade in a signal transduction pathway. They can activate yet more genes.
What electrical impulse travels outward from the cell body along what?
Typically, the electrical signal that travels from the dendrites across the cell body travels by cable conduction properties (like cable TV). Once the signal reaches the axon hillock, which is the spot where the axon branches off the cell body, the electrical signal starts traveling by action potentials (and maybe some cable conduction). The signal travels to the terminal end of the axon where it initiates a calcium influx, which in turn initiates a release of neurotransmitter to act on the next, post-synaptic neuron. The axon is the long process (arm) that extends from the first cell body to the next neuron.
What part of nerve cell is adjacent to neuromuscular junction?
The axon terminal of a nerve cell is adjacent to the neuromuscular junction. The axon terminal releases neurotransmitters that transmit signals across the synapse to the muscle fiber. This signal triggers muscle contraction.
What does stretching a myocardial cell cause the cell to do?
Stretching a myocardial cell allows more Ca+2 into the cell and increases the force of contraction (the longer the muscle fiber when it begins to contract, the greater the force of contraction).
What signal might be considered a growth stimulating signal for a yeast cell?
Ras2 might be considered a growth stimulating signal for a yeast cell. It stimulated PKA and MAPK activity in the cell.
What specific event initiates the contraction?
The specific event that initiates a muscle contraction is the release of calcium ions within the muscle cell. This triggers a series of chemical reactions that ultimately lead to the sliding of actin and myosin filaments, resulting in muscle contraction.
What role do transcription factors play in cell?
By binding to a plasma membrane receptor it initiates a cascade in a signal transduction pathway. They can activate yet more genes.
What electrical impulse travels outward from the cell body along what?
Typically, the electrical signal that travels from the dendrites across the cell body travels by cable conduction properties (like cable TV). Once the signal reaches the axon hillock, which is the spot where the axon branches off the cell body, the electrical signal starts traveling by action potentials (and maybe some cable conduction). The signal travels to the terminal end of the axon where it initiates a calcium influx, which in turn initiates a release of neurotransmitter to act on the next, post-synaptic neuron. The axon is the long process (arm) that extends from the first cell body to the next neuron.
What role do nerves play in skeletal contraction?
When you think about moving your arm, your brain sends a signal down a nerve cell telling that muscle to contract. -
What protein that initiates cell division?
Growth Factors.
What process is not involved in moving water from roots to leaves in a plant?
Cell contraction
Describe the events of muscle cell contraction?
6 steps in a muscle contraction
What part of nerve cell is adjacent to neuromuscular junction?
The axon terminal of a nerve cell is adjacent to the neuromuscular junction. The axon terminal releases neurotransmitters that transmit signals across the synapse to the muscle fiber. This signal triggers muscle contraction.
What does stretching a myocardial cell cause the cell to do?
Stretching a myocardial cell allows more Ca+2 into the cell and increases the force of contraction (the longer the muscle fiber when it begins to contract, the greater the force of contraction).
What signal might be considered a growth stimulating signal for a yeast cell?
Ras2 might be considered a growth stimulating signal for a yeast cell. It stimulated PKA and MAPK activity in the cell.
What is the term for the cell that receives a signal at a synapse?
The cell receiving the signal at the synapse is called the postsynaptic neuron.
Why does blood pressure vary sinusoidally in the aorta?
The Sinoatrial node is the heart's natural pacemaker. An electrical impulse generated in the SA node travels from cell to cell until it reaches the AV node. The AV node is a gate that slows the signal to allowing for contraction and oxygen replenishment.
