A patient's blood pressure rises significantly when a medication constricts efferent arterioles in the kidneys. Which mechanism explains this hypertensive effect?

💡 Explanation

The blood pressure rises because vasoconstriction of efferent arterioles increases pressure within the glomerulus. The increased glomerular filtration raises systemic blood pressure due to the renin-angiotensin system; therefore, increased glomerular pressure explains the hypertension, rather than reduced sodium reabsorption or altered hormone levels.

• In Alzheimer's disease, which mechanism explains why neurodegenerative pathology propagates across spatially distinct brain regions?
• Which mechanism initiates muscle contraction following neuron depolarization?
• Which mechanism causes increased brain ammonia concentration in cirrhosis?
• If a patient exhibits prolonged bleeding times despite normal platelet count after taking a new medication, which mechanism of platelet aggregation is most likely inhibited?
• If a patient with a known bee sting allergy is stung, and epinephrine is unavailable, why does administering an H1 receptor antagonist (antihistamine) provide only limited relief?
• If a patient's arterioles experience widespread vasoconstriction, which consequence follows regarding overall hemodynamics?