Which of the following examples is a true statement about the differences between hormones and neurotransmitters?

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone?In response to a visit by tourists, which penguins—habituated or non-habituated—would show a greater change in expression of genes for liver enzymes involved in converting amino acids to glucose? Explain.

Ecotourism helps conserve wildlife by increasing the value of wildlife conservation for local people. In Argentina, the world's largest breeding colony of Magellanic penguins is visited by thousands of tourists every year, causing the penguins to become habituated to the presence of people. Has ecotourism affected the penguins' ability to respond to stressors? Has it affected the penguins' secretion of corticosterone?Suggest at least two distinct physiological mechanisms that could be responsible for the difference in corticosterone response to a stressor in habituated and non-habituated penguins.

The endocrine system relies on __________ that __________ all of the cells of the body.

A cell releases a cytokine, which binds to and acts on a neighboring cell. This represents an example of __________.

Which is an accurate statement regarding the difference between steroid and nonsteroid hormones?

Because most chemical signals are unable to pass through the plasma membrane, the cellular action they initiate results from __________.

What is the role of a second messenger in hormone action?

What result would you expect following the binding of epinephrine to an α-type epinephrine receptor?