The pericardial cavity contains ________, which acts as a lubricant, reducing friction between the opposing surfaces.
Fill in the blank(s) with the appropriate word(s).
pericardial fluid or serous fluid
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A ________ plane cuts perpendicularly along the long axis of the body or organ.
A. oblique B. transverse C. coronal D. sagittal E. frontal
Low levels of calcium within cells are maintained by
A. a high number of voltage-gated and leakage channels for calcium in cell membranes. B. frequent exocytosis and endocytosis of calcium-containing vesicles. C. pumps that move calcium out of cells or into the sarcoplasmic reticulum. D. osmosis of large amounts of water into cells that have any calcium within them.
The bladder wall is composed of three layers of ____ muscle called the detrusor muscle
a. smooth b. skeletal c. striated d. cardiac
The QRS complex is associated with ________
A) depolarization of the ventricular septum B) depolarization of the ventricles C) depolarization of the atria D) repolarization of the ventricles