What is the pathway of blood into, through, and out of the hepatic portal system?
What will be an ideal response?
The hepatic portal vein forms through the fusion of the superior mesenteric and splenic veins. Most of the nutrients
and the greater volume of blood comes from the superior mesenteric artery. The hepatic portal vein also receives
blood from the gastric veins, the gastroepiploic veins, and the cystic vein from the gallbladder and delivers the
blood to the liver. In the portal triads at the periphery of liver lobules, the branches of the hepatic portal vein empty
into liver sinusoids. As the blood flows through the sinusoids, nutrients are absorbed by hepatic cells before the
blood reaches the central vein. Blood is eventually drained from the liver through hepatic veins into the inferior
vena cava.
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The enzyme initially released in response to a reduction in blood flow detected by the kidney is
A. renin. B. angiotensin. C. angiotensin I. D. angiotensin converting enzyme. E. aldosterone.
During appositional growth,
A) bones grow longer. B) bones grow wider. C) bone is replaced by cartilage. D) the epiphysis fuses with the diaphysis. E) osteoblasts are overwhelmed by osteocytes.
An adult has approximately ________ taste buds
A) 100 B) 10,000 C) 4,000,000 D) 500 E) 50,000
Which pressure is created by the presence of large proteins in the blood, such as albumin?
A) hydrostatic pressure B) interstitial fluid osmotic pressure C) colloid osmotic pressure D) interstitial fluid hydrostatic pressure