The best type of diet for a bird is a _________________ diet
Fill in the blank(s) with correct word
pelleted
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In some cases the epiphyseal plate of the long bones of children closes too early. What might be the cause?
A) elevated levels of sex hormones B) too much vitamin D in the diet C) overproduction of thyroid hormone D) osteoblast activity exceeds osteoclast activity
Name two cytokines involved in hematopoiesis. What is the name of the cytokine that plays an important role in the immune system?
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about cerebrospinal fluid is incorrect?
a. forms at the choroid plexuses and is reabsorbed across the arachnoid villi into the blood within the dural sinuses b. serves as a shock-absorbing fluid to cushion the brain against jarring movements c. comes into direct contact with neurons d. fills the subarachnoid space e. influences the composition of the brain interstitial fluid more than the blood does
Which statement is true about up-regulation and down-regulation?
A. Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the amount of hormone. B. Up-regulation is the increase in the amount of hormone and down-regulation is the decrease in the amount of hormone. C. Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the number of receptors for a hormone. D. Up-regulation is the decrease in the number of receptors for a given hormone and down-regulation is the increase in the number of receptors for a hormone.