________ are produced at the end of the meiotic divisions in the seminiferous tubules.
A) Spermatogonia
B) Primary spermatocytes
C) Spermatids
D) Secondary spermatocytes
E) Spermatozoa
C) Spermatids
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Imagine the following scenario: Platelets adhere to a damaged blood vessel ? Platelets secrete various substances ? Platelets adhere to a damaged blood vesselThis is an example of ________ feedback.
A. negative B. positive
Which of the following is NOT part of the alimentary canal?
A. Rectum B. Pancreas C. Duodenum D. Esophagus
What can help prevent clots from forming in undamaged blood vessels?
A. Smooth endothelium of blood vessel walls B. Prothrombin activator C. Heparin from basophils and mast cells D. Both heparin and a smooth endothelium are correct.
Blood functions to ________.
A. store energy for the heart B. transport nutrients to the tissues C. provide support to the heart D. allow for heart contraction and relaxation E. line the heart chambers