Which condition is the most common cause of failure of kidney transplants??
A) ?Rejection of the kidney by the recipient
B) ?Infection
C) ?Negative side effects of medications
A
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During organogenesis, which somite-derived structure gives rise to the muscles of the trunk?
A. The myotome B. The sclerotome C. The dermatome D. The pharyngeal pouches E. The coelom
Choose the example that does not demonstrate a negative feedback loop of hormonal control.
A. A hormone is released from the hypothalamus, stimulating the anterior pituitary gland to release another hormone that is involved in metabolism. The flow of that hormone back to the hypothalamus inhibits the production of the first hormone in the pathway, also ceasing the production of the metabolism-influencing hormone. B. Pressure receptors sense the movement of a baby against and through the cervix during labor. They stimulate the hypothalamus to release a hormone that causes uterine contractions. This causes more pressure receptor stimulation, leading to larger releases of the hormone and stronger, more frequent contractions. Hormone release ceases after pressure sensations cease. C. A hormone that increases blood pressure is released. Baroreceptors in the arteries sense the pressure change and stimulate the brainstem to send signals to dilate blood vessels and counter the effect, decreasing blood pressure. D. A gland releases a hormone that causes free blood glucose to be collected and stored after a meal. After a time, the gland detects low free blood glucose and ceases production of the hormone.
Edema and varicose veins in the lower extremities sometimes develop in the third trimester of a pregnancy due to
A. decreased cardiac output. B. elevated blood pressure. C. compression of abdominal blood vessels. D. elevated hematocrit.
Which of the following is true of a baserunner weighing 70 Newtons and a baserunner weighing 50 Newtons?
A. the centripetal force exerted on the heavier baserunner will be greater B. the heavier baserunner will not be able to run as fast around the bases, due to a greater centripetal force C. if the baserunners run at the same velocity around the bases, the heavier baserunner will have to lean in more towards the pitcher's mound due to a greater centripetal force D. all of the above are true