Question

the terms autocrine, endocrine, exocrine, and paracrine all refer to mode

o sleeping

o secretion

o metabolism

o energy production

question 6

choose the root that means a protein on the surface of a cell that turns a chem
on the outside to a signal on the inside of the cell.

o agonist

o receptor

o antagonist

o drome

Explanation:

• Autocrine, endocrine, exocrine, and paracrine are all related to how cells secrete substances. Autocrine secretion acts on the same cell that secreted it. Endocrine secretion releases hormones into the bloodstream. Exocrine secretion uses ducts (e.g., sweat glands). Paracrine secretion acts on nearby cells. So, these terms refer to secretion.
• A receptor is a protein on the cell surface. It binds to a chemical signal (like a hormone or neurotransmitter) outside the cell and transmits the signal inside the cell, often triggering a cellular response. An agonist binds to a receptor and activates it. An antagonist binds to a receptor but blocks its activation. "Drome" is not related to this cell - signaling protein definition.

Answer:

For the first question: secretion.
For the second question: receptor.