Schwann cells differ from oligodendrocytes in which of the following ways?
A. Schwann cells form myelin; oligodendrocytes do not.
B. Oligodendrocytes are only found in the PNS; Schwann cells are only found in the CNS.
C. Schwann cells form sheaths around several axons, while oligodendrocytes form sheaths around only one axon.
D. Schwann cells form a myelin sheath around a portion of only one axon, while oligodendrocytes can surround portions of several axons.
E. None of these choices are true differences.
D
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When the left ventricle contracts, it pushes blood through a valve to the:
a. aorta b. pulmonary artery c. pulmonary vein d. inferior vena cava
What are the more than one million functional units found in each kidney called?
A. Collecting ducts B. Nephrons C. Major calyces D. Renal pyramids E. Minor calyces
Which of the following is a descending pathway in the spinal cord?
A. Corticospinal tract B. Spinoreticular tract C. Fasciculus gracilis D. Trigeminothalamic tract E. Spinothalamic tract
Answer the following statements true (T) or false (F)
1. Running barefoot results in higher joint torque at the knee than using running shoes. 2. A motionless body is in a state of static equilibrium. 3. The center of gravity of an object is always located within the object. 4. When other factors remain constant, an increase in the mass of an object will subsequently increase the object's stability. 5. If force is applied directly to the axis of rotation, torque will equal zero.