The crista galli:
A) is the anatomic point of attachment of the meninges.
B) is divided into the anterior, middle, and posterior fossae.
C) is a horizontal bone perforated with numerous foramina.
D) allows the passage of the olfactory nerves from the nasal cavity.
Answer: A) is the anatomic point of attachment of the meninges.
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Lymph returns to the blood by way of the:
a. aorta b. thoracic duct c. superior vena cava d. inferior vena cava
An electrocardiogram is usually abbreviated as ECG, but sometimes also as:
a. EC b. EG c. ECM d. EKG e. ELC
Potassium secretion is regulated by
A) aldosterone. B) angiotensin I. C) renin. D) atrial natriuretic peptide (ANP). E) parathyroid hormone (PTH).
Which of the following statements about blood is false?
A) It contains buffers that control pH. B) Normal pH is 6.8 to 7.0. C) It is more viscous than water. D) It is about 55 percent plasma. E) None of the statements are false; all are true.