The trigger zone of a neuron
a. is at the axon terminal
b. is located in the hillock
c. contains voltage gated channels
d. both (b) and (c) above
e. all of these answers.
D
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A group of rats are bred in a laboratory to study muscle function. This group possesses a genetic defect that causes the myosin heads to bind ADP irreversibly. The rats are entirely paralyzed. Which of the following correctly explains the impact of the defect on the muscle?
A. Because ADP is permanently bound, the myosin heads can never bind to the actin binding sites of the thin filament. B. ATP won't bind to the myosin heads, preventing the actin binding site of the thick filament from being revealed. C. ATP won't bind to the myosin heads, causing the thin filament to be constantly pulled in the power stroke of contraction. D. Because ADP is permanently bound, the myosin heads will be irreversibly cross-bridged with the actin binding sites of the thin filament.
As the number of rows of detectors increases in a CT gantry, the number of slices obtained with each revolution of the tube decreases.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. The respiratory membrane lines most of the air distribution tubes in the respiratory system. 2. The respiratory membrane separates the air in the alveoli from the blood in the vessels. 3. The mucous blanket helps to purify the air as it enters the lung. 4. The cilia lining the air distribution tubes beat downward to help move air into the lung. 5. The cilia lining the air distribution tubes beat upward to help move the trapped debris to the pharynx.
The coronoid fossa is seen on coronal sectional images of the elbow medial to the lateral epicondyle and proximal to the capitulum of the distal humerus.
Answer the following statement true (T) or false (F)