Questions: Temporary, widespread vasodilation and syncope caused by a sudden nervous system reaction MOST accurately describes: Select one: A. vasovagal shock. B. neurologic shock. C. psychogenic shock. D. neurogenic shock. To protect vital organs, the body compensates by directing blood flow away from organs that are more tolerant of low flow, such as: Select one: A. the brain. B. the lungs.

The answer to the first question is C: psychogenic shock.

Explanation for each option: A. Vasovagal shock: This is not a standard term used in medical terminology. The correct term is vasovagal syncope, which refers to a sudden drop in heart rate and blood pressure leading to fainting, often in reaction to a stressful trigger. However, it does not describe widespread vasodilation and syncope caused by a sudden nervous system reaction. B. Neurologic shock: This term is not commonly used in medical practice. It might be confused with neurogenic shock, but it is not the correct term for the condition described. C. Psychogenic shock: This term accurately describes a sudden nervous system reaction leading to temporary, widespread vasodilation and syncope. It is often triggered by emotional stress or trauma. D. Neurogenic shock: This type of shock is caused by a disruption in the autonomic pathways within the spinal cord, leading to a loss of vascular tone and subsequent hypotension. It does not typically describe a sudden nervous system reaction leading to syncope.

The answer to the second question is B: the lungs.

Explanation for each option: A. The brain: The brain is highly sensitive to low blood flow and is one of the last organs to be deprived of blood during compensatory mechanisms. B. The lungs: The lungs are more tolerant of low blood flow compared to other vital organs like the brain and heart. Therefore, the body can afford to direct blood flow away from the lungs to protect more critical organs. C. The heart: The heart is crucial for maintaining circulation and is not typically deprived of blood flow during compensatory mechanisms. D. The kidneys: While the kidneys are important, they are more tolerant of low blood flow compared to the brain and heart, but less so than the lungs.

Summary:

1. Temporary, widespread vasodilation and syncope caused by a sudden nervous system reaction most accurately describes psychogenic shock.
2. To protect vital organs, the body compensates by directing blood flow away from organs that are more tolerant of low flow, such as the lungs.