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* Hypovolemic shock. The single most common cause of shock is blood volume loss, resulting from a serious wound or a severe burn leading to hypovolemic shock. * Cardiogenic shock is caused by the failure of the heart to pump effectively. This can be due to damage to the heart muscle, most often from a large myocardial infarction. Other causes of cardiogenic shock include arrhythmias, or cardiac valve problems. * Distributive shock. As in hypovolemic shock there is an insufficient volume of blood. This form of relative hypovolaemia is the result of dilation of bloodvessels. Examples of this form of shock are: * Septic shock is caused by overwhelming infection leading to vasodilation. It is treated by antibiotics, fluid replacement, and vasoconstrictors. * Acute adrenal insufficiency is not infrequently the result of discontinuing corticosteroid treatment without tapering the dosage. * Less commonly severe anaphylactic reactions may cause anaphylactic shock as allergens trigger widespread vasodilation and movement of fluid out of the blood into the tissues. * The rarest cause of shock is acute spinal cord injury leading to neurogenic shock. Neurogenic shock is caused by the sudden loss of the sympathetic nervous system signals to the smooth muscle in vessel walls. Without this constant stimulation the vessels relax resulting in a sudden decrease in peripheral vascular resistance and decreased blood pressure. * Obstructive shock. Hereby the flow of blood is obstructed. Several conditions result in this form of shock. * Cardiac tamponade, in which blood in the pericardium prevents inflow of blood into the heart (venous return). Or constrictive pericarditis which has the same effect. * Pneumothorax. Through increased intrathoracic pressure bloodflow to the heart is prevented (venous return). * Pulmonary embolism is the result of a thromboembolic incident in bloodvessels of the lungs and hinders the return of blood to the heart.
What else can I help you with?
What two processes can affect the path of seismic waves?
Seismic wave reflection and refraction are the two processes that can affect the path of seismic waves. Reflection occurs when seismic waves bounce off a boundary between different materials, while refraction occurs when seismic waves change direction as they pass from one material to another with different properties.
Which earthquake waves are the first to be recorded on a seismometer and are the fastest?
P-waves which are a compression or pressure wave are the fastest seismic waves. As they are the fastest they will reach the seismic station before any of the other seismic waves and be recorded first. Seismologists can use the difference between the arrival times of different seismic waves to calculate the distance and ultimately the location of the earthquakes epicentre. For information on this, please see the related question.
What does the time-distance graph of seismic waves show?
The time-distance graph of seismic waves shows the relationship between the time it takes for seismic waves to travel and the distance they travel. It helps in determining the speed at which seismic waves propagate through the Earth's interior and provides information about the structure and composition of the Earth's layers.
Type of wave generated by an earthquake?
Seismic waves are the type of waves generated by an earthquake. These waves travel through the Earth and are responsible for the shaking and ground motion associated with earthquakes. There are different types of seismic waves, including P-waves, S-waves, and surface waves.
In which direction do seismic waves travel from their point of origin?
Seismic waves travel outward in all directions from their point of origin, which is the focus of an earthquake. The waves propagate through the Earth's interior in various patterns and speeds, with different types of waves exhibiting different behaviors.
Which is The most damaging of the three kinds of seismic waves?
The surface waves
When seismic waves interact with boundaries between different kinds of rock within earth they can be refracted?
Yes. You are true.
What is different about the seismic waves?
The way seismic waves are different are that they're slower than the p waves who move a lot faster to reach the earthquake.
Why do seismic waves change speed?
"True, the Seismic Waves change speed and direction when they encounter different materials."
What are the three different seismic waves?
Seismic Waves:Surface WavesPrimary WavesSecondary Waves-Hope this helps :D-Dinaly Is Cool.
What are two kinds of seismic wave?
Body Waves and surface waves. I know that because it says it in my science book.:D
What are the different types of seismic waves?
idk bitvh
What two processes can affect the path of seismic waves?
Seismic wave reflection and refraction are the two processes that can affect the path of seismic waves. Reflection occurs when seismic waves bounce off a boundary between different materials, while refraction occurs when seismic waves change direction as they pass from one material to another with different properties.
Explain how scientists use seismic waves to map the earth's interior?
scientists use seismic waves to map earths interior by seismographs that measure the times at witch seismic waves arrive at different distances from an earth quake.
Is seismic waves and earthquake waves the same?
Seismic waves are any waves that travel through the Earth. As such all earthquake waves are seismic waves, however not all seismic waves are caused by earthquakes.
What does seismic?
(not seismic, seismic wave)Seismic waves are waves of energy that travel through the earth.
What is another name for earthquake waves?
Seismic waves.
