Question

multiple select question
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select all that apply
choose all of the following in which portal systems occur.
□ heart
□ between the hypothalamus and anterior pituitary
□ between the lungs and the heart
□ between the intestines and liver
□ kidneys

Explanation:

1. Portal systems are vascular systems where blood passes through two capillary beds before returning to the heart.
2. The hypothalamo - hypophyseal portal system exists between the hypothalamus and anterior pituitary, allowing direct transport of hormones.
3. The hepatic portal system is between the intestines and liver, carrying nutrient - rich blood from the gut to the liver.
4. The heart has a normal circulatory pathway, not a portal system. The lungs - heart pathway is part of the pulmonary circulation (single capillary bed in lungs, then to heart), not a portal system. Kidneys have a renal circulation with single capillary bed (glomerulus), not a portal system.

Answer:

B. Between the hypothalamus and anterior pituitary, D. Between the intestines and liver