Answer the following statements true (T) or false (F)
1. When blood plasma enters a lymph node, it is called lymph.
2. It is easier for substances to move into a lymph node than into a blood capillary.
3. Lymph does not circulate through the lymph system the same way blood circulates through the circulatory system.
4. Thymosins are hormones released by the thymus gland, which influence the development of B lymphocytes.
5. The spleen can hold about 100 mL of blood.
Ans:
!. False
2. True
3. True
4. False
5. False
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Smooth muscle has ________ and not troponin.
A. norepinephrine B. fibronectin C. calmodulin D. titin
Cyanocobalamin is found exclusively in plants.
Answer the following statement true (T) or false (F)
Bones are constantly undergoing resorption for various reasons. Which of the following cells accomplishes this process?
A) osteoclast B) osteocyte C) osteoblast D) stem cell
Which of the following is not true of cardiomyocytes?
A. They usually have one nucleus. B. Mitochondria make up about 2% of the cell volume. C. They are joined by intercalated discs. D. They have T tubules that admit extracellular calcium. E. They are striated.