Which embryological cells give rise to muscle fibers?
A. Myoblasts
B. Mesoderms
C. Satellite cells
D. Somites
E. Myotomes
Answer: A
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The number of vertebrae that fuse to form the sacrum is
A. two. B. three. C. four. D. five.
Blockage of the ileocecal valve would prevent
A. lymph from entering the jejunum. B. chyme from entering the ileum. C. bile from entering the duodenum. D. chyme from entering the large intestine. E. pancreatic juice from entering the duodenum.
List the components of the lymphatic system
A) The components of the lymphatic system are the lymph and lymph nodes. B) The components of the lymphatic system are the blood, blood vessels, lymph, and lymphatic vessels. C) The components of the lymphatic system are the red blood cells, lymphocytes, blood plasma, lymph, blood vessels, and lymphatic vessels. D) The components of the lymphatic system are the lymphocytes, lymph, lymphatic vessels, primary lymphoid tissues and organs, and secondary lymphoid tissues and organs. E) The components of the lymphatic system are the lymphocytes, lymph, lymph nodes, and lymphatic vessels.
Analysis of a glandular secretion indicates that it contains some DNA, RNA, and membrane components such as phospholipids. What kind of secretion is this and why?