Chapter 01 – The Science of Biology
63. 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?
64. A chemical imbalance in the blood can cause the heart to stop pumping blood, which will
have a detrimental effect on other organs. This observation can be attributed to:
Luke went to a pediatrician when he was 6 months old. The pediatrician consulted a graph
and concluded that Luke was in the 97th percentile for height, weight and length. The
pediatrician predicted that Luke would be tall when he reached adulthood.
LO: 01.02.01 Compare the different types of reasoning used by biologists.
Section: 01.02
Topic: The Nature of Science