NURS 6501: MIDTERM EXAM: Please contact Assignment Samurai for help with NURS 6501: Midterm Exam or any other assignment. Email: assignmentsamurai@gmail.com     n: ADH is produced by the hypothalamus and released from the posterior pituitary gland.   In pulmonary hypertension, which of the following alterations in the pulmonary arteries is NOT typically anticipated? Group of answer choices

• Fibrosis of the intima
• Arteriosclerosis
• Dilatation of the arteries
• Medial hypertrophy

The correct answer is Dilatation of the arteries. Explanation: In pulmonary hypertension, the typical changes that occur in the pulmonary arteries are associated with increased vascular resistance and increased pressure. These changes are primarily due to vascular remodeling rather than artery dilation. Here’s a breakdown of the changes:

1. Fibrosis of the intima: This occurs as a part of the vascular remodeling process, where the inner lining (intima) of the arteries becomes thickened and fibrotic, contributing to increased resistance.
2. Arteriosclerosis: This is a term for the hardening or stiffening of the arteries. In pulmonary hypertension, arteriosclerosis can develop in the pulmonary arteries due to the chronic increased pressure, leading to a decrease in the elasticity of the vessels.
3. Medial hypertrophy: This refers to the thickening of the smooth muscle layer (media) of the pulmonary arteries. In pulmonary hypertension, the medial layer thickens as the body attempts to counteract the increased pressure, leading to further narrowing of the vessels and increased resistance.

Why dilatation of the arteries is NOT typical:

• In pulmonary hypertension, the pulmonary arteries tend to become narrowed due to thickening of the intima, medial hypertrophy, and fibrosis, rather than dilated.
• Dilatation of the arteries is more commonly seen in conditions like chronic pulmonary embolism (where the arteries are obstructed) or left heart failure, but in primary pulmonary hypertension, the vessels constrict and remodel in response to the increased pressure, leading to narrowing rather than dilation.

Conclusion: In pulmonary hypertension, typical alterations in the pulmonary arteries include fibrosis of the intima, arteriosclerosis, and medial hypertrophy, but dilatation of the arteries is not typically