Naive T cells can synthesize antibodies
Indicate whether the statement is true or false
FALSE
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Which of the following statements best describes the structure of the blood-brain barrier that provides its functional characteristics?
a) Processes of astrocytes wrap tightly around capillaries in the brain. b) Tight junctions tightly seal endothelial cells of capillaries in the brain. c) Gap junctions tightly seal endothelial cells of capillaries in the brain. d) Spot desmosomes tightly link capillary endothelial cells together. e) The basement membrane of capillaries in the brain contains extremely small pores.
Which of the following is incorrect pertaining to lymph drainage of the liver?
A) There are both superficial and deep lymphatic vessels. B) Some drainage is via vessels passing directly to phrenic nodes. C) Some drainage is to vessels within the falciform ligament. D) Hepatic nodes are located in the greater omentum. E) Metastases spread via the lymph system will eventually reach the celiac nodes.
Which of the following mechanisms help to maintain body temperature on hot days?
a. Decreased muscle tone b. Skin vasodilation c. Sweating d. Only two of these e. a, b, and c
A portal system
A. is one in which multiple arteries converge on one organ or body region. B. is a simple circulatory system with an arteriovenous anastomosis. C. includes a functional end artery that makes an arterial anastomosis. D. is one in which blood flows through two capillary beds before being sent back to the heart. E. is one in which circulation to a large organ involves only one artery and one main (portal) vein.