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Ch. 25 The Urinary System
Marieb - Human Anatomy & Physiology 11th Edition
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Marieb, Hoehn 11th EditionCh. 25 The Urinary System문제 1
25장, 문제 1

The lowest blood concentration of nitrogenous waste occurs in the
a. Hepatic vein
b. Inferior vena cava
c. Renal artery
d. Renal vein

검증된 단계별 안내
1
Step 1: Understand the role of nitrogenous waste in the body. Nitrogenous wastes, such as urea, are produced by the breakdown of proteins and are primarily removed from the blood by the kidneys.
Step 2: Identify the blood vessels involved in the circulation of blood through the liver and kidneys. The hepatic vein carries blood away from the liver, the inferior vena cava carries blood back to the heart, the renal artery brings blood to the kidneys, and the renal vein carries blood away from the kidneys.
Step 3: Consider where nitrogenous waste concentration would be highest and lowest. Since the kidneys filter blood to remove nitrogenous wastes, the blood leaving the kidneys (through the renal vein) should have the lowest concentration of these wastes.
Step 4: Compare the options based on their function. The renal artery carries blood to the kidneys (higher waste concentration), and the renal vein carries filtered blood away (lower waste concentration). The hepatic vein and inferior vena cava carry blood from other regions and are not primarily involved in nitrogenous waste removal.
Step 5: Conclude that the lowest blood concentration of nitrogenous waste occurs in the renal vein, as it carries blood that has been filtered by the kidneys.

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주요 개념

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Nitrogenous Waste in Blood

Nitrogenous wastes, such as urea, are byproducts of protein metabolism that circulate in the blood. Their concentration varies depending on the organ's role in filtering or processing these wastes, with the kidneys playing a key role in their removal.
추천 영상:
가이드 코스
07:16
Osmoregulation and Nitrogenous Waste

Kidney Function and Blood Filtration

The kidneys filter blood to remove nitrogenous wastes and excess substances, producing urine. Blood entering the kidneys via the renal artery contains higher waste levels, while blood leaving through the renal vein has lower concentrations after filtration.
추천 영상:
6:37
Blood Supply to the Kidneys

Blood Vessels Involved in Waste Transport

The renal artery carries blood rich in nitrogenous wastes to the kidneys, while the renal vein carries filtered blood with reduced waste levels away. The hepatic vein and inferior vena cava transport blood from other regions and do not primarily reflect nitrogenous waste clearance.
추천 영상:
가이드 코스
4:59
Blood Vessels
관련 실천
교과서 질문

The glomerular capillaries differ from other capillary networks in the body because they

a. Have a larger area of anastomosis

b. Are derived from and drain into arterioles

c. Are not made of endothelium

d. Are sites of filtrate formation

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교과서 질문

Damage to the renal medulla would interfere first with the functioning of the

a. Glomerular capsules

b. Distal convoluted tubules

c. Collecting ducts

d. Proximal convoluted tubules

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교과서 질문

Which is reabsorbed by the proximal convoluted tubule cells?

a. Na⁺

b. K⁺

c. Amino acids

d. All of the above

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