During saltatory conduction, action potentials jump from
A) one astrocyte to another.
B) an axon to a dendrite.
C) one internode to another.
D) one node of Ranvier to another.
E) one microglia cell to another.
Answer: D) one node of Ranvier to another.
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The renal pyramids of the medulla receive their blood supply from which blood vessel network?
a) afferent arterioles b) cortical radiate arteries c) peritubular capillaries d) vasa recta
Which of the following body cavities contain(s) cerebrospinal fluid?
A. Thoracic and abdominopelvic cavities B. Anterior body cavity C. Thoracic cavity D. Pelvic cavity E. Cranial cavity and vertebral canal
Which type of cartilage is found in the intervertebral discs?
A. Elastic cartilage B. Articular cartilage C. Fibrocartilage D. Hyaline cartilage E. Reticular cartilage
Which of the following statements about epithelial cells or epithelial transport is NOT correct?
A. When substances cross epithelial barriers by going through the cell membranes and cytosol, it is called the transcellular pathway. B. The plasma membrane of epithelial cells that face the inside of a hollow or fluid-filled chamber in the body is called the basolateral membrane. C. Epithelial cells lining the small intestine have Na+-K+-ATPase pumps only in their basolateral membranes. D. Epithelial cell membranes express different transport proteins on different cell surfaces. E. The pathway taken by substances that flow between epithelial cells is called the paracellular pathway.