Which of the following is NOT typically true about G proteins?
A. They can be inhibitory for second-messenger production.
B. They can be stimulatory for second-messenger production.
C. They act as second messengers.
D. They can act as transducers for activated receptors by opening or closing ion channels.
Answer: C
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The primary function of the cardiovascular system is:
a. body temperature regulation b. transportation of materials c. regulation of the immune system d. none of the above
Which of the following is an abnormal lateral curvature of the vertebral column often seen in the thoracic region?
A) kyphosis B) scoliosis C) swayback D) lordosis
Which portion of the nephron establishes a medullary osmotic gradient?
a. Proximal convoluted tubule b. Distal convoluted tubule c. Loop of Henle d. Collecting tubule
Which of the following statements concerning the anatomical position is correct?
A. Body is erect with eyes looking forward B. Arms are at sides with palms directed backward C. Arms are behind the head with toes directed forward D. Body is supine with eyes closed