The type of fibers specialized to continue contracting for extended periods of time, as would be required in running a marathon, for example, are ________ fibers.
A. intermediate
B. fast and intermediate
C. fast
D. slow
E. slow and intermediate
Answer: D
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In a patient receiving a bone marrow transplant which of the following cell types will be genetically dissimilar than the patient's own cells?A) NeutrophilsB) BasophilsC) MonocytesD) Endothelial cellsE) Thymus tissue cells
What will be an ideal response?
You have spent 24 hours traveling from the U.S to New Zealand, on quite a few airplanes with many stops. Because of the stress, changes in time zones, and short blocks of time between planes, you find yourself tired with a headache when you arrive. You are severely dehydrated. A hematocrit value of your blood would be ________ than normal because ________
A) lower; more red blood cells are being made by the bone marrow B) higher; you have less blood plasma volume C) lower; the bone marrow is making fewer red blood cells due to the latitude of the airplanes D) higher; more plasma proteins are made by the liver E) lower; you have less blood plasma volume
Which of the following is not true of the pineal gland?
A) It produces melatonin. B) It is located in the brain. C) It helps regulate the body's "biological clock." D) All of the above are true of the pineal gland.
At an excitatory synapse, an action potential in the presynaptic neuron increases
a. the membrane potential of the postsynaptic cell membrane b. the permeability of the postsynaptic cell to Na+ c. the permeability of the postsynaptic cell to Cl- d. the presynaptic neuron's membrane potential e. all of the above