0
What else can I help you with?
What causes filtrate to flow?
Filtrate flows due to a pressure difference between the blood in the glomerulus and the Bowman's capsule in the kidney. This pressure difference is created by the blood being under higher pressure than the Bowman's capsule, allowing fluid and small molecules to be filtered through the filtration membrane.
What releases when the sympathetic nervous system responds to a decrease in glomerular filtration rate?
Increased sympathetic activity causes the afferent arterioles of the renal glomerulus to constrict, thereby reducing blood flow into the glomerulus. Because a decrease in blood flow reduces blood pressure in the glomerulus, which is the driving force for filtration, GFR decreases.
An obstruction in the glomerulus would affect the flow of blood into the?
Efferent arteriole
An obstruction in the glomerulus would affect the flow of blood into what?
efferent arteriole
What is the structure that drains blood from the glomerulus in the kidney?
The structure that drains blood from the glomerulus in the kidney is the efferent arteriole. This arteriole carries blood away from the glomerulus and plays a crucial role in regulating blood flow and pressure within the kidney.
What is the role of glomerulus in excretion?
The glomerulus is a cluster of blood capillaries in the kidney that filters blood to form urine. It helps in the initial stage of urine formation by filtering out waste products, toxins, and excess substances from the blood while retaining necessary molecules like water and electrolytes. The filtered fluid, known as glomerular filtrate, is then processed further in the nephron to form urine for excretion.
What makes up the renal portal system?
It is made up of the afferent arteriole which supplies blood to the kidneys. The glomerulus, which is the first capillary bed produces filtrate. The efferent arteriole takes blood from the kidneys. The peritubular capillary system, which is the second capillary bed reclaims most of the filtrate. Filtrate is what eventually becomes urine.
Where does the transition from an afferent arteriole to an efferent arteriole occur?
glomerulus. The afferent arteriole leads to a ball of capillaries called a glomerulus which is enclosed in a nephron structure called the glomerular capsule. Blood leaves the glomerulus by way of the efferent arteriole.
An example of a countercurrent is what?
In the human body, the countercurrent exchange system in the nephrons of the kidney allows for efficient reabsorption of water and ions. Blood flow and filtrate flow travel in opposite directions, enhancing the exchange of solutes between the blood and the filtrate for optimal water conservation.
How high blood pressure built up in the glomerulus?
It builds up because the calibre of the efferent arteriole is less than that of the afferent arteriole. The cappilary pressure is opposed by the lower osmotic pressure or the blood and the lower filtrate hydrostatic pressure in the glomerular capsule.
An obstruction in the afferent arteriole would reduce the flow of blood into the?
glomerulus, leading to a decrease in blood pressure within the glomerulus. This reduction in pressure may impair the filtration process in the kidney, potentially leading to decreased urine production and retention of waste products in the body.
Explain how the blood vessels associated with the renal corpuscle help to maintain a relatively high blood pressure within the glomerulus?
The cluster of capillaries that forms a glomerulus arises from an afferent arteriole. After passing through the glomerular capillaries, blood (minus any filtered fluid) enters an efferent arteriole whose diameter is smaller than that of the afferent vessel. This is instead of entering a venule, the usual circulatory route. The efferent arteriole resists blood flow to some extent, which backs up blood into the glomerulus, increasing pressure in the glomerular capillary.
