What are the differences among permissive effects, synergistic effects, and antagonistic effects of hormones?

Do most steroid hormones have cell membrane receptors or intracellular receptors? Why?

Is a hormone altered as a consequence of its interaction with a receptor? Is the receptor altered as a consequence of hormone binding? What are the forces that bind hormone and receptor?

What are catecholamines in relation to the endocrine system?

What is the common goal of the nervous and endocrine systems?

What characteristics of a chemical substance define it as a hormone, and how can hormones attain cell type specificity?

Which of the following are ways in which hormones exert their effects?   - by controlling the rates of enzymatic reactions - by controlling changes in gene transcription - by activating postsynaptic receptors and generating EPSPs in hypothalamic neurons - by controlling the transport of ions across a cell membrane

Where is Atrazine used and banned?

Do amine hormones have intracellular or cell surface receptors? Ex: epinephrine?

Is a hormone changed as a result of binding to a receptor? Is the receptor changed as a result of binding the hormone? What are the binding forces between hormone and receptor?