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

Anatomy & Physiology

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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

Anatomy & Physiology

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

Anatomy & Physiology

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

Anatomy & Physiology

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.

Anatomy & Physiology