Cardiac muscle fibers are joined by special gap junctions called intercalated discs; these discs allow heart activity to be closely coordinated
Indicate whether the statement is true or false
TRUE
You might also like to view...
Matching
A) C B) E C) D D) A E) B 1) Produces ATP aerobically. 2) Site of enzymatic breakdown of phagocytized material. 3) Packages proteins for insertion in the cell membrane or for exocytosis. 4) Site of synthesis of lipid and steroid molecules. 5) Forms the mitotic spindle. 6) Replicate for cell division. 7) When ruptured it releases the enzymes responsible for autolysis.
Which of the following statements concerning sutures is false?
A. The opposing bones in the joint interdigitate for stability. B. They may become completely immovable in adults. C. The tissue between the bones is hyaline cartilage. D. Membranes, called fontanels, are present in some sutures at birth. E. The periosteum of adjacent bones is continuous over the joint.
To induce full cellular effects, thyroid hormones also require the actions of ________.
A. somatomedins B. 9-cis-retinoic acid C. melatonin D. adrenocorticotropin
The appendix contains lymphatic nodules.
Answer the following statement true (T) or false (F)