What is a portal vein? Describe the hepatic portal circulation
What will be an ideal response
A vein that carries blood from one capillary network to another is called a portal vein. The hepatic portal circulation carries venous blood from the gastrointestinal organs and spleen to the liver. It receives blood from GI organs and the spleen and delivers it to the liver. After a meal it is very rich in nutrients absorbed from the GI tract.
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Gap junctions contain carrier proteins that transport ions from one cell into another cell
Indicate whether the statement is true or false
A heavyset middle-aged insurance salesman, who doesn't exercise often, accepts his friend's invitation to a pickup basketball game. When attempting a jump shot, he falls to the ground in pain, grasping at the calf of his leg. There is an enormous bulge in his leg immediately below the popliteal fossa, and he is unable to plantar flex that foot. Most likely he has injured his ________ and the bulge is ________.
A. calcaneal tendon; his triceps surae B. hamstrings; a large hematoma (blood clot) C. tibia; a previously undetected bone tumor D. patellar ligament; his fibularis longus E. quadriceps tendon; his rectus femoris
Which of the following events occurs on the postsynaptic membrane?
A. acetylcholine production B. rapid degradation of acetylcholine C. release of neurotransmitter D. neurotransmitter combines with a receptor molecule E. release of calcium ions
Blood spurts back into the _____________ when the right atrium contracts.
a. aorta b. pulmonary trunk c. venae cavae d. pulmonary veins