PhysioEx 9.0 Exercise 10 ANSWERS
PhysioEx – Exercise 9
Activity 1:
1. excretion and regulation
2. glomerular capillaries (glomerulus) & Bowman’s capsule
3. The filtrate flows from the Bowman's capsule into the renal tubule called the proximal convoluted tubule then into the loop of Henle, and finally into the distal convoluted tubule:
a. Proximal Convoluted Tubule
b. Loop of Henle
c. Distal Convoluted Tubule
4. When the radius of the afferent arteriole was decreased, the pressure and the filtration rate both decreased.
5. When the radius of the afferent arteriole was increased, the pressure and the filtration rate both increased.
6. When the radius of the efferent arteriole was decreased, the pressure and the filtration rate both increased.
7. When the radius of the efferent arteriole was increased, the pressure and the filtration rate both decreased.
Activity 2:
1. When you increase the blood pressure, the glomerular capillary pressure and the glomerular filtration rate will also increase.
2. As the pressure increased, the urine volume increased proportionally.
3. Increased blood pressure can be a result of increased blood volume. For this reason, an increase in urine volume would stabilize blood volume.
4. If you close the one way valve, pressure will increase in the Bowman's capsule and filtration rate will decrease.
5. With increased pressure and the valve closed, the filtration rate decreased but the glomerular pressure stayed the same. Urine output was zero.
Activity 3:
1. Both increasing the afferent arteriole radius and decreasing the efferent arteriole resulted in an increase in glomerular filtration rate.
2. When both arteriole radii changes were implemented, glomerular filtration rate and pressure rose above baseline values.
3. Increasing the afferent radius or decreasing the efferent radius would compensate for lowered blood pressure.
4. Increasing the afferent radius had a greater effect than decreasing the efferent radius because there was a greater
Activity 1:
1. excretion and regulation
2. glomerular capillaries (glomerulus) & Bowman’s capsule
3. The filtrate flows from the Bowman's capsule into the renal tubule called the proximal convoluted tubule then into the loop of Henle, and finally into the distal convoluted tubule:
a. Proximal Convoluted Tubule
b. Loop of Henle
c. Distal Convoluted Tubule
4. When the radius of the afferent arteriole was decreased, the pressure and the filtration rate both decreased.
5. When the radius of the afferent arteriole was increased, the pressure and the filtration rate both increased.
6. When the radius of the efferent arteriole was decreased, the pressure and the filtration rate both increased.
7. When the radius of the efferent arteriole was increased, the pressure and the filtration rate both decreased.
Activity 2:
1. When you increase the blood pressure, the glomerular capillary pressure and the glomerular filtration rate will also increase.
2. As the pressure increased, the urine volume increased proportionally.
3. Increased blood pressure can be a result of increased blood volume. For this reason, an increase in urine volume would stabilize blood volume.
4. If you close the one way valve, pressure will increase in the Bowman's capsule and filtration rate will decrease.
5. With increased pressure and the valve closed, the filtration rate decreased but the glomerular pressure stayed the same. Urine output was zero.
Activity 3:
1. Both increasing the afferent arteriole radius and decreasing the efferent arteriole resulted in an increase in glomerular filtration rate.
2. When both arteriole radii changes were implemented, glomerular filtration rate and pressure rose above baseline values.
3. Increasing the afferent radius or decreasing the efferent radius would compensate for lowered blood pressure.
4. Increasing the afferent radius had a greater effect than decreasing the efferent radius because there was a greater