Which result from activation of the renin-angiotensin system?
What are results from activation of the renin-angiotensin system? Vasoconstriction, increased water retention, stimulated thirst, increased secretion of aldosterone, increased release of ADH, and increased blood pressure.
How do the kidneys regulate the osmolarity of the blood and blood pressure?
The kidneys work with the adrenal cortex, lungs, and liver in the renin–angiotensin–aldosterone system to regulate blood pressure. They regulate osmolarity of the blood by regulating both solutes and water.
Which result from activation of the renin-angiotensin system quizlet?
Which result from activation of the renin-angiotensin system? Increased release of ADH.
Which structure is composed of a fenestrated capillary endothelium?
The glomerular capillaries are lined by a fenestrated endothelium that sits on the glomerular basement membrane, which in turn is covered by glomerular epithelium, or podocytes, which envelops the capillaries with cellular extensions called foot processes. In between the foot processes are the filtration slits.
How does renin angiotensin mechanism works?
Renin catalyzes the conversion of a plasma protein called angiotensinogen into a decapeptide (consisting of 10 amino acids) called angiotensin I. An enzyme in the serum called angiotensin-converting enzyme (ACE) then converts angiotensin I into an octapeptide (consisting of eight amino acids) called angiotensin II.
What happens when renin secretion increases?
Renin’s primary function is therefore to eventually cause an increase in blood pressure, leading to restoration of perfusion pressure in the kidneys. Renin is secreted from juxtaglomerular kidney cells, which sense changes in renal perfusion pressure, via stretch receptors in the vascular walls.
What happens when blood osmolarity increases?
When osmolality increases, it triggers your body to make antidiuretic hormone (ADH). This hormone tells your kidneys to keep more water inside your blood vessels and your urine becomes more concentrated. When osmolality decreases, your body doesn’t make as much ADH. Your blood and urine become more diluted.
How does the kidney regulate blood ionic composition?
1.1. The basic unit of the kidney is the nephron, and its function is to balance the ionic composition of the blood by filtering the blood, retrieving the necessary ions, secreting excess ions, and conserving water to concentrate the urine.
What will be the effect on the kidneys if the renin angiotensin system is activated?
An activated renin-angiotensin-aldosterone system promotes both systemic and glomerular capillary hypertension, which can induce hemodynamic injury to the vascular endothelium and glomerulus. In addition, direct profibrotic and proinflammatory actions of angiotensin II and aldosterone may also promote kidney damage.
Which of the following hormones is secreted in response to angiotensin II?
Angiotensin II causes secretion of prolactin and adrenocorticotropic hormone (ACTH) when added to pituitary cells in vitro.
What is fenestrated endothelium?
Fenestrations are round or ovoid transcellular holes through the most attenuated part of the EnC cytoplasm. They are found in the endothelium of organs where a higher rate of exchange between intra- and extravascular compartments is required.
What can pass through fenestrated capillaries?
Fenestrated capillaries work with the rest of your circulatory system to move nutrients, waste and oxygen through your body. These little blood vessels play an essential role in helping your kidneys filter waste and create urine. They allow your small intestines to absorb vitamins and minerals from foods you eat.