The partial pressure gradient for oxygen (in the body) is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues
What will be an ideal response
Equal amounts of O2 and CO2 can be exchanged in the lungs and at the tissues because CO2 solubility in plasma and alveolar fluid is 20 times greater than that of O2.
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The dural sinuses are found between the dura mater and arachnoid.
Answer the following statement true (T) or false (F)
The higher the concentration of H+ is, the lower the pH is.
Indicate whether this statement is true or false.
Which cells form myelin in the spinal cord?
A. Schwann cells B. Astrocytes C. Satellite cells D. Oligodendrocytes E. Microglia
Which of the following is not involved in the relaxation of muscle?
a. when acetylcholine is destroyed by acetylcholinesterase. b. when there is no longer a local action potential. c. when the T tubules actively take up the Ca2+ that had been released. d. when the actin and myosin molecules are no longer bound together. e. when the troponin-tropomyosin complex slips back into its blocking position.