Lab 7: Latest Update

BIOD152 / BIOD 152 Module 7 &

Lab 7: (Latest Update 2025 / 2026)

Essential Human Anatomy & Physiology II with Lab | Questions & Answers | Grade A 100% Correct - Portage Learning

Question:

What causes the extremely high blood pressure in the glomerular capillaries?

Answer:

The afferent arteriole, which is fed by the interlobular artery, is much larger in diameter than the efferent arteriole. The difference in diameter causes an extremely high blood pressure in the glomerular capillaries.

Question:

Micturition can be controlled consciously because of:

Answer:

Voluntary control over the external sphincter

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Question:

This is the pressure that depends upon a person's blood pressure from the

heart and vessels:

Answer:

Hydrostatic pressure

Question:

Calculate the net filtration pressure for your patient given the following values. Show your work. (Not all values listed may be used).

• Colloid osmotic pressure = 25
• Capsular pressure= 15
• Hydrostatic pressure = 50

- GFR= 120

Answer:

(Outgoing forces - incoming forces) HP- (COP + Capsular pressure) 50mmHg - (25mmHg +15mmHg)) = 10mmHg (net outward pressure)

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Question:

Describe in detail what happens during an emergency to control the rate of blood to the kidney

Answer:

the renal autoregulatory system is superseded by higher level nervous system controls. When the nervous system takes over regulation, the afferent arterioles diameter is narrowed by sympathetic nerve fibers. The release of the hormone epinephrine by the adrenal medulla causes a decrease in renal blood flow and decreases the GFR.

Question:

Which of the following statements is false concerning the RAA system?

Answer:

It responds when blood pressure becomes too high.

Question:

The greatest amount of _______ occurs in the cells of the PCT.

Answer:

Reabsorption

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Question:

True or False: Na+ can leave the ascending limb but not the descending limb.

Answer:

true

Question:

Which of the following is true concerning ADH?

Answer:

It retains up to 99% of water in the filtrate.

Question:

What is countercurrent flow? How does the nephron use this to maintain homeostasis?

Answer:

Countercurrent flow is the movement of fluids in opposite directions through adjacent channels. In the nephron, filtrate flows in one direction through the renal tubules while blood in the adjacent blood vessels flows in the opposite direction

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