Describe the physical protection afforded by the cerebrospinal fluid.
What will be an ideal response?
Because the brain floats on CSF there is less weight and, therefore, less pressure on the blood vessels and nerves attached to the CNS. The fluid also pads the brain so it is less likely to hit the cranium and risk bruising when there is a blow to the head.
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The three types of cones are designated:
A) red, green, and yellow. B) red, yellow, and blue. C) red, green, and blue. D) yellow, red, and blue.
Which of the following statements regarding myosin in skeletal muscle is TRUE?
A. Myosin cross-bridge heads contain two binding sites, one for actin and one for tropomyosin. B. Myosin is an ATPase. C. The rate of ATP hydrolysis by myosin is the same in all types of skeletal muscle. D. All of the myosin cross-bridge heads in a thick filament are oriented and rotate in the same direction. E. Troponin covers the binding site on myosin molecules until Ca2+ binds to troponin to remove it from its blocking position.
List the different types of adrenergic receptors, the responses they produce, and by what mechanisms
Which is accurate regarding ketoacidosis?
A) Blood pH may drop below 7.05. B) Blood pH may rise to 9.05. C) Blood pH is not affected. D) Increased alkalinity of body tissues occurs. E) Conditions do not ever become so severe that coma results.