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Acetylcholine binds to sarcolemma; sarcolemma then T-tubules depolarize; Ca++ released from terminal cisternae travels along SR, is release into sarcoplasm, then binds to troponin to unblock tropomyosin binding sites allowing cross-bridge formation (i.e., myosin heads bind to actin).
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What is the relationship between energy and phase changes?
During phase changes, energy is either absorbed or released in the form of heat. This energy is used to break or form intermolecular forces between particles. As a result, temperature remains constant during the phase change until all the substance has transitioned to the new phase.
List two changes of state of water that cause latent heat to be released?
When water vapor condenses into liquid water, latent heat is released. Similarly, when liquid water freezes into ice, latent heat is also released.
What happens when a gas reaches a cold surface and it changes into a liquid?
Both a chemical and physical change occurs.
Explain why the temperature of Wax remains constant during solidification?
it's because it releases the latent heat of fusion. Latent heat means energy is given out when a substance changes from liquid to solid without a change in temperature. and the transfer of energy doesnt change the KE of the particles, so the temperature remains unchanged. lanten heat gives rise to the change in PE of the particles during the change of state only
What is the difference between latent heat of fusion and latent heat of vapourization?
the heat which is absorbed by a substance for changing solid into liquid state by keeping temperature constant is called latent heat of fusion while the heat which is evolved during phase change of liquid to vapour state at constant temperature is called latent heat of vapourization
Is a typhoon a chemical change?
No, a typhoon is a physical structure energized by the latent heat of phase changes involving water.
What intracellular activies are occurring in the muscle fiber during the latent phase?
During the latent phase of muscle contraction, there are several intracellular activities occurring within the muscle fiber. Calcium ions are released from the sarcoplasmic reticulum into the cytosol, which triggers the activation of the contractile proteins actin and myosin. Additionally, ATP is hydrolyzed to provide the necessary energy for cross-bridge formation and movement. This phase is crucial for preparing the muscle fibers for the subsequent contraction.
Does heat energy add during condensation?
During condensation, heat energy is released as water vapor changes to liquid water. This is known as the latent heat of condensation.
What is the significance of the negative value of latent heat in a substance?
The negative value of latent heat in a substance indicates that energy is being released when the substance changes its state, such as from a gas to a liquid or from a liquid to a solid. This release of energy is important because it affects the temperature and behavior of the substance during these phase changes.
The energy that gas changes to liquid?
The latent heat of condensation.
Is energy released or absorbed when water changes state from a solid to a liquid to a gas?
Energy is absorbed when water changes state from a solid to a liquid to a gas. This energy is used to break the bonds between water molecules during melting and vaporization. It is known as the latent heat of fusion and latent heat of vaporization, respectively.
What type of energy is absorbed or released when a substance changes phase?
pChanges in bonding arrangements between atoms and molecules result in absorption or release of heat (called latent heat). For example when water freezes, some heat is extracted to the environment, and the temperature does not fall until all is frozen. After that further removal of heat causes the temperature to fall below freezing point.
When a substance changes state latent heat is?
Latent heat is the amount of energy absorbed or released by a substance during a phase change without a change in temperature. For example, when ice melts into water, it absorbs latent heat, and when water freezes into ice, it releases latent heat. This energy is crucial for processes such as melting, freezing, boiling, and condensing, as it facilitates the transition between solid, liquid, and gas states.
Does Jimmy Swaggart suffer from Tourette syndrome?
Probably not. A nervous twitch could be a latent fear of the imminent rapture occurring.
What is latent energy in a fuel?
Latent energy in a fuel refers to the energy released during the combustion process of the fuel. This energy is stored within the chemical bonds of the fuel and is released in the form of heat when the fuel is burned. It is a crucial factor in determining the energy content and efficiency of a fuel.
What are two changes of state for water that cause latent heat to be released?
When water vapor condenses into liquid water, latent heat is released. Similarly, when liquid water freezes into ice, latent heat is also released. These changes of state involve the release of latent heat because energy is being released as the water molecules transition to a lower energy state.
Why doesn't the thermometer measure latent heat?
A thermometer measures temperature by detecting the average kinetic energy of the particles in a substance, rather than the energy involved in phase changes, such as latent heat. Latent heat is the energy absorbed or released during a phase change, like melting or boiling, and does not directly affect the average kinetic energy of the particles that the thermometer detects.
