Answer the following statements true (T) or false (F)
1. Only nonmyelinated axons can have a neurilemma.
2. White matter in the central nervous system has only axons, not dendrites of cell bodies.
3. Gray matter can be made up of axons, dendrites, or cell bodies.
4. The knee-jerk reflex uses one more neuron than does the withdrawal reflex.
5. Fissures in the central nervous system are the same as gyri, except they are deeper.
1. FALSE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
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What is the function of the ductus venosus?
A. It is a shunt between the right and left atria that bypasses the fetal lungs. B. It is a shunt that flows between the umbilical vein and inferior vena cava and bypasses the liver. C. It is a shunt between the umbilical vein and aorta that rapidly passes maternal blood to the fetus. D. It is a shunt between the pulmonary trunk and the aorta that bypasses the fetal lungs. E. It is a shunt between the superior vena cava and aorta that rapidly passes maternal blood to the fetus.
Which of the following would slow down gas exchange between the blood and alveolar air?
A. An increase in membrane thickness B. An increase in alveolar surface area C. An increase in respiratory rate D. A decrease in membrane thickness E. A decrease in nitrogen solubility
In response to severe injuries or burns, the body may repair itself by producing scar tissue to fill the damaged area. This process is called ________.
Fill in the blank(s) with the appropriate word(s).
To meet the definition of polyuria, the minimum daily output of urine is ________
A) 1.5 L B) 1.0 L C) 3.0 L D) 0.5 L E) 2.0 L