0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What can occur when the effects of one graded potential are added onto the effects produced by another graded potential which can lead to an action potential?
More sodium ions pile up (accumulate) at the axon hillock from the combination of the two (or more) graded potentials, which may be then be sufficient to initiate the action potential.
What substances plays a mojor role in generating the membrane potential of a neuron?
Well, for starters, membrane potential is a separation of charges across the membrane. So i think what you mean is "generating the action potential in a neuron". So in that case The substance that plays a major role in generating an action potential is Sodium (Na+). However, if you really mean membrane potential, there is only two substances associated with that and those are sodium (Na+) and potassium (K+).However, in truth, the generation of an action potential depends on the ligand and its receptor.
What two structures are closely associated at the neuromuscular junction?
I think it might be Nerve Stimulus and Action Potential
Describe the path of an action potential through the conduction system?
Generally, cardiac excitation begins in the sinoatrial (SA) node. An action potential spontaneously arises in the SA node and then conducts throughout both atria via gap junctions in the intercalated discs of atrial fibers. Following the action potential, the two atria finish contracting at the same time. The action potential also reaches the atrioventricular (AV) node, located in the interatrial septum, just anterior to the opening of the coronary sinus, where the action potential slows whereby providing time for the atria to empty their blood into the ventricles. Then the action potential enters the atrioventricular (AV) bundle because it is the only site where action potentials can conduct from the atria to the ventricles. After conducting along the AV bundle, the action potential then enters both the right and left bundle branches that course through the interventricular septum toward the apex of the heart. Large-diameter Purkinje fibers rapidly conduct the action potential, first to the apex of the ventricles and then upward to the remainder of the ventricular myocardium. Then, a fraction of a second after the atria contract, the ventricles contact.
What is it called when two identical molecules react to form two charged molecules?
autoionization
What can occur when the effects of one graded potential are added onto the effects produced by another graded potential which can lead to an action potential.?
More sodium ions pile up (accumulate) at the axon hillock from the combination of the two (or more) graded potentials, which may be then be sufficient to initiate the action potential.
What can occur when the effects of one graded potential are added onto the effects produced by another graded potential which can lead to an action potential?
More sodium ions pile up (accumulate) at the axon hillock from the combination of the two (or more) graded potentials, which may be then be sufficient to initiate the action potential.
What two important requirements are necessary before generator action is possible?
Conductor in a magnetic field with relative motion between the two.
Why is a chemical energy a form of potential energy?
Chemical energy is a form of potential energy because they both are forms of stored energy.Because of this, atoms and molecules can have chemical potential energy. Anytime two atoms form a strong covalent or ionic bond or two molecules form a weak van der Waals bond, chemical energy is converted into other forms of energy, usually in the form of heat and light.
What substances plays a mojor role in generating the membrane potential of a neuron?
Well, for starters, membrane potential is a separation of charges across the membrane. So i think what you mean is "generating the action potential in a neuron". So in that case The substance that plays a major role in generating an action potential is Sodium (Na+). However, if you really mean membrane potential, there is only two substances associated with that and those are sodium (Na+) and potassium (K+).However, in truth, the generation of an action potential depends on the ligand and its receptor.
What two structures are closely associated at the neuromuscular junction?
I think it might be Nerve Stimulus and Action Potential
What are the two energy carrier molecules used to transfer energy from the citric acid cycle to the electron transport chain?
the kenitic energy and the potential energy
Describe the path of an action potential through the conduction system?
Generally, cardiac excitation begins in the sinoatrial (SA) node. An action potential spontaneously arises in the SA node and then conducts throughout both atria via gap junctions in the intercalated discs of atrial fibers. Following the action potential, the two atria finish contracting at the same time. The action potential also reaches the atrioventricular (AV) node, located in the interatrial septum, just anterior to the opening of the coronary sinus, where the action potential slows whereby providing time for the atria to empty their blood into the ventricles. Then the action potential enters the atrioventricular (AV) bundle because it is the only site where action potentials can conduct from the atria to the ventricles. After conducting along the AV bundle, the action potential then enters both the right and left bundle branches that course through the interventricular septum toward the apex of the heart. Large-diameter Purkinje fibers rapidly conduct the action potential, first to the apex of the ventricles and then upward to the remainder of the ventricular myocardium. Then, a fraction of a second after the atria contract, the ventricles contact.
How does the myelin sheath affect the speed of action potential?
Myelin sheath does several things that affect the speed of an action potential.It acts as an insulator around a neuron axon, thereby focusing the propagation of the action potential along the axis of the axon.The action potential "leaps" from one node of Ranvier (the node in between two myelinated segments) to the next, and to the next, and to the next, and so on, faster than the action potential can propagate as a wave along an unmyelinated axon of the same diameter.The regions along a myelinated axon depolarize locally and successively, thus allowing an action potential to travel along an axon using less energy, which in turn allows the neuron to repolarize more quickly, and thus be ready to conduct the next action potential sooner, thereby increasing the overall speed of information transmission.
What is necessary for charges to flow between two points?
Either potential difference (apply voltage) or energy input (drag the charged particle)
What are examples of forms of energy?
Potential energy and kinetic energy are two forms of energy. Potential energy is stored energy and is the energy of position; gravitational energy is an example of potential energy. Kinetic energy is the motion of waves, molecules, objects, and substances.
Why is the term action potential used to describe a nerve impulse?
It is a difference in charge supplied by ion position. In resting potential the tendency is for the inside of the cell membrane to have a negative ionic charge, while the outside of the membrane has a positive charge. The change, back and forth in these two charge potentials is the conduction of charge down the neuron and is called the action potential.
