Explain the interactions of parathyroid hormone and calcitonin.
What will be an ideal response?
Parathyroid hormone and calcitonin are antagonistic hormones, which are released in response to blood calcium levels. In other words, PTH acts on the same target organs as calcitonin, but produces the opposite effects. Parathyroid hormone is released from the parathyroid glands, and calcitonin is released from the thyroid gland. If blood calcium concentration is high, calcitonin is released. Calcitonin activates osteoblasts and causes calcium to be deposited in bone and thus removed from the blood, restoring normal concentration levels. Parathyroid hormone is released when blood calcium concentration is too low. PTH activates osteoclasts in bone. This causes reabsorption of calcium from the bone and release into the blood, restoring normal blood levels of calcium.
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a. Nikasil b. aluminum c. cast-iron d. chrome
Technician A says that when an engine OEM uses a Bosch fuel injection system, Bosch service information software must be used to access engine data. Technician B says that when an engine OEM uses a Bosch fuel injection system, Bosch diagnostic software must be used to troubleshoot engine problems. Who is right?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Find i and V? in the circuit of Fig. 2.100.
 FIGURE 1.png)
Which of these is true regarding the work schedule of a typical automotive service technician?
A) Two days off every five days B) The shop is usually closed on weekends C) It is generally a 45 hour work week D) Evening work may be required