The step of the cross-bridge cycle that immediately follows the attachment of ATP to the myosin head is referred to as the "powerstroke."
Indicate whether the statement is true or false.
FALSE
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The thymus is located posterior to the
A. manubrium of the sternum. B. body of the sternum. C. xiphoid process of the sternum. D. None of the above; the thymus is anterior to the thyroid gland.
Which of the following chemicals effects blood pressure for both the short and long term?
A) atrial natriuretic peptide B) angiotensin II C) nitric acid D) aldosterone
Which of the following expresses the correct average characteristics and composition of semen?
a. volume, 4 mL; sperm count; 20-100 million/mL b. volume, 0.5 L; sperm count, 10-100 million/mL c. volume, 1 mL; sperm count, 200-600 million/mL d. volume, 4.5 mL; sperm count, 5-10 million/mL
The "hypothyroid" condition also known as "myxedema," may be characterized by the formation of a "goiter," or enlargement of the thyroid gland.
a. true b. false