Which of the following does NOT contain a mucosa-associated lymphatic tissue?
A) appendix
B) tonsil
C) Peyer's patch
D) thymus
D
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The arachnoid villi lack the tunica intima found in blood vessels.
Answer the following statement true (T) or false (F)
What is the advantage of the small diameter of capillaries?
A) It dampens the rise in pressure during ventricular systole. B) It slows blood flow, allowing sufficient time for capillary exchange to occur. C) It absorbs the pressure changes that occur during the cardiac cycle. D) It allows the vessels to overcome the force of gravity without a need for valves. E) It prevents the backflow of blood, improving venous return.
The abdominal aorta splits into which vessels?
The face, head, and cheeks are located in a dermatome supplied by nerves from what spinal cord region?
A) sacral B) thoracic C) cervical D) lumbar E) No spinal nerves innervate the dermatome containing the face.