What would you find in the marrow cavity of the diaphysis of an adult humerus (arm bone)?
A. Hematopoietic tissue
B. Red bone marrow
C. Compact bone
D. Yellow bone marrow
E. Periosteum
Answer: D
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The vascular pressure that declines from roughly 35 mm Hg to about 18 mm Hg is the
A) venous pressure. B) capillary hydrostatic pressure. C) diastolic pressure. D) peripheral pressure. E) pulse pressure.
Identify the structural characteristics of smooth muscle fibers
A) long fibers with T tubules, myofibrils, and sarcomeres B) short fibers with T tubules, myofibrils, and intercalated discs C) thick fibers with myofibrils and desmosomes D) spindle shaped fibers that lack T tubules, myofibrils, and sarcomeres E) round fibers that lack thin filaments and dense bodies
Which of the following statements about synaptic potentials is FALSE?
a. they vary with size of stimulus b. they decay with distance c. they may be depolarizing or hyperpolarizing d. the # of ligand-gated ion channels at synapse has no effect on their size
Which of the following is NOT a function of the lymphatic system?
A. Defending from infection caused by microorganisms and other foreign substances B. Aiding in erythropoiesis of red blood cells C. Absorbing and transporting lipids from the digestive tract D. Maintaining fluid balance by returning excess interstitial fluid to the blood