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.
Answer: B
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Blood is a connective tissue comprised of cellular elements and an extracellular matrix comprised primarily of water. What is the name of the blood's extracellular matrix?
a. hematocrit. b. fibrinogen. c. buffy coat. d. plasma. e. none of these answers.
The parasympathetic part of autonomic division ________.
A. carries action potentials to the visceral organs to prepare the body for resting and digesting B. carries action potentials to the visceral organs to prepare the body for fight or flight C. controls the skeletal muscles D. carries sensory information from skeletal muscles to the CNS E. carries sensory information from visceral organs to the CNS
How does the beta rhythm react when the eyes are open?
A) Cycles per second decrease, but the peaks (amplitude) get higher. B) Cycles per second increase and become more variable, and the peaks (amplitude) decrease. C) Cycles per second and the peaks (amplitude) both decrease. D) Cycles per second increase and become predictable, and the peaks (amplitude) also increase.
The adrenal medulla secretes mostly ________.
A. endorphins B. norepinephrine (noradrenaline) C. dopamine D. acetylcholine (ACh) E. epinephrine (adrenaline)