Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity
B. Energy utilization
C. Cellular organization
D. Homeostasis
E. Evolutionary adaptation
D
You might also like to view...
A parent has a genotype of RrYy. What is the probability of having a gamete with the RY genotype?
a. 1/2 b. 1/4 c. 3/4 d. 1/8 e. 0
The several hundred species of picture-winged fruit flies of the Hawaiian Islands are genetically very similar, yet they all differ markedly from their ancestral population in Asia. This is probably an example of ________
A. gene flow. B. sexual selection. C. disruptive selection. D. founder effect. E. directional selection.
tRNA is a key player in protein synthesis. Which of the following is true of tRNAs
A. they carry amino acids to the ribosomes B. they are the product of translation C. they carry codon for amino acids D. None of the answers is correct E. they carry message to be read by ribosomes
What is a canaliculus?
A. the large cavity inside a long bone B. a type of bone forming cell C. a stress plate in spongy bone D. a small channel in the matrix of bone E. a fibrous connective covering of bone