Which statement about peptide and protein hormones is true?

Question

Quizplus · Accepted Answer

Peptide and protein hormones need second messengers to alter cellular activity. These hormones bind to receptors on the surface of target cells, which then activate secondary messengers within the cytoplasm to bring about the desired cellular response.

Answer: A, B, D
 Peptide and protein hormones make up a minority of hormones and need second messengers to alter cellular activity. Their receptors are found on specific cells rather than all cells, giving them specificity in their actions. They cannot diffuse through the plasma membrane, as they are water-soluble and unable to cross the hydrophobic barrier of the membrane.

Which Statement About Peptide and Protein Hormones Is True