The short-term controls of blood pressure, mediated by the nervous system and bloodborne chemicals, primarily operate via all but which of the following?
A) reflex arcs involving baroreceptors
B) altering blood volume
C) reflex arcs associated with vasomotor fibers
D) chemoreceptors
B) altering blood volume
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Which of the following hormones is responsible for causing the differentiation of follicular cells and the formation of a mature follicle?
a. LH b. FSH c. GnRH d. Oocyte maturation-inhibition substance
All of the following are true statements EXCEPT:
A) The cells of lymphatic capillaries are tightly joined. B) Lymphatic vessels operate under low-pressure. C) Lymphatic vessels belong to a one-way system that drains lymphatic capillaries. D) Lymph flow is driven in part by contraction of smooth muscle in the walls of lymph-collecting vessels.
Water has hydrogen bonds, which give it its unique properties.
Answer the following statement true (T) or false (F)
What type of cell is activated in lymphatic tissue by macrophages presenting antigens during a viral infection?
A) helper T (TH) cell B) plasma cell C) natural killer (NK) cell D) memory B cell