13 Questions
Which of the following best describes the main function of hormones in the endocrine system?
Regulating cellular activities in target cells
In terms of secretion, how do endocrine glands differ from exocrine glands?
Endocrine glands secrete hormones into ducts
Which of the following is NOT a major structural class of hormones?
Carbohydrates
What is the main function of the amine hormones in the endocrine system?
Influence metabolism and physiological activities
Which of the following is NOT a predominant steroid hormone produced by the adrenal cortex?
Testosterone
What is the primary source from which steroid hormones are produced?
Cholesterol
Which hormones circulate mainly bound to plasma proteins?
Steroid hormones
What is the main role of the liver and kidneys in relation to hormones?
Removal of hormones from the plasma
Where are the majority of receptors for steroid and thyroid hormones located?
Inside the target cells
What is permissiveness in hormone-hormone interaction?
One hormone enables another hormone to exert its full effect
How do receptors activated by peptide hormones and catecholamines function?
By altering membrane potential or protein activity in the cell
What controls the secretion of a hormone?
A combination of plasma concentration, neural input, and one or more hormones
How does the autonomic nervous system control the secretion of many hormones?
By directly terminating on cell endings
Test your knowledge about hormone production, transport in the blood, metabolism and excretion. Learn about the roles of ovaries, liver, kidneys, and plasma proteins in hormone regulation.
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