A 65-year-old man has chronic renal failure. What are the expected changes in his serum Ca++, Pi, and calcitriol levels? (Note: Changes are those expected compared with an individual with normal renal function.)
Serum [Ca++] Serum [Pi] Calcitriol level
A. ? ? ?
B. ? ? ?
C. ? ? ?
D. ? ? ?
E. ? ? ?
ANS: A
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Answer the following statements true (T) or false (F)
1. Cerebrospinal fluid is returned to the blood by being absorbed in the choroid plexus. 2. A blockage of the flow of cerebrospinal fluid can result in a condition called hydrocephalus. 3. A plexus allows the fibers from several spinal nerves to reorganize into a single peripheral nerve. 4. A skin surface area supplied by a single spinal nerve is called a plexus. 5. The autonomic nervous system is more likely to stimulate a smooth muscle than a voluntary muscle.
Select the statement that is true concerning primary teeth
A) There are 20 primary teeth, and by 24 months of age most children have all 20. B) There are 27 primary teeth, and the molars are permanent. C) There are 32 primary teeth, and by 36 months of age, most children have all 32. D) There are 24 primary teeth, and no new primary teeth appear after 13 months.
Which of the following organ systems would most likely be affected by breaking a rib?
A) digestive B) respiratory C) excretory D) endocrine E) All of the answers are correct.
Translation
A. requires the pairing of codons on mRNA with anticodons on tRNA. B. requires three types of DNA. C. takes place in the nucleus. D. involves synthesis of RNA from DNA molecules. E. requires replication of DNA.