Concept explainers
To determine: The main actions of renin-angiotensin-aldosterone pathway.
Introduction: The kidney is an important organ of the excretory system, and nephron is the basic structural unit of kidney. The main function of nephron is ultrafiltration. It removes waste products, ions, and excess water from the blood, and returns the required molecules back to the blood. The glomerular filtration rate (GFR) refers to the rate of flow of filtered fluid through the kidney.
To compare: The main actions of this pathway with the actions of atrial natriuretic peptide (ANP).
Introduction: Blood pressure is the force that moves the blood through the circulatory system. Angiotensin, antidiuretic hormone, aldosterone, and atrial natriuretic peptide are hormones that participate in regulating the blood pressure.
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Biology (MindTap Course List)
- Renin is secreted in response to hypovolemia or to an increase in the osmolality of the blood. Provide three possible mechanisms by which these conditions may stimulate rennin secretion. What are the consequences of increased rennin secretion that lead to increased aldosterone secretion? Present this sequence of events. Why are angiotensin converting enzyme inhibitors (ACEIs) used as a common therapy for hypertension? How do they influence blood pressure? Are plasma levels of renin elevated or depressed in a patient with Conn’s disease? Why?arrow_forwardDescribe how ANP is regulated and how it opposes the action of the other three hormones (angiotensin II, ADH, and aldosterone).arrow_forwardDescribe the Angiotensinogen-Angiotensin I-Angiotensin II Mechanism?arrow_forward
- Give the steps in the renin angiotensin pathway from start to finish.arrow_forwardExplain the mechanism how furosemide affects kidney tubules. How does this affect K+ balance? How different is the mechanism of thiazide affect urine production? Describe the process of acid-base regulation in human body.arrow_forwarda. A person ingests an ion-channel inhibitor, such that the ion channels present in the Loop of Henle are only able to pump at half their normal rate? b. What would this person notice about changes to their physiological filtration? (Answer a and b)arrow_forward
- describe the endocrine system of angiotensinogen > angiotensin 1 > angiotensin 2arrow_forwardWrite the summary of the renin-angiotensin system and the stimulation of aldosterone secretion by angiotensin II?arrow_forwardExplain how the capacity (function) of the sodium potassium pumps found in the ascending loop of Henle enable the establishment of the medullary concentration gradient.arrow_forward
- All of the following are true about glucose recovery from the tubule fluid, except (choose the incorrect statement): A. All filtered glucose is released in the PCT unless plasma glucose abnormally high B. It is reabsorbed by coupling with Na+ recovery via a sodium glucose cotransporter C. Glucose recovery is made possible by low intracellular Na+ concentrations created by the NaK pump D. The CD recovers any glucose that is not reabsorbed by the PCT nephron loop and DCT this is not and will not be gradedarrow_forwardthere is a known cause of high blood pressure that occurs because of a reduced fluid flow that triggers RAAS and Na+ reaborption with increased blood volume and pressure. what is it?arrow_forwardHow would a reduction in Angiotensin II in the body affect the hypothalamus, pituitary gland, adrenal gland and blood pressurearrow_forward
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