Secrete chemical messengers that travel in the bloodstream.
A newly developed pesticide has been observed to bind to an intracellular hormone receptor. If ingested, residue from this pesticide could disrupt levels of _______ _________.
thyroid hormone
How many hormones are produced by the posterior pituitary?
2
Which of the following hormones contributes to the regulation of the body's fluid and electrolyte balance?
antidiuretic hormone
Which of the following statements about the thyroid gland is true?
It is located anterior to the trachea and inferior to the larynx, the parathyroid glands are embedded within it, it manufactures three hormones.
A student is in a car accident, and although not hurt, immediately experiences pupil dilation, increased heart rate, and rapid breathing. What type of endocrine system stimulus did the student receive?
positive feedback
The development of a goiter indicated that_________.
There is an excessive accumulation of colloid in the thyroid follicles.
Which of the following can result from hyperparathyroidism?
fractures
Which of the following responses is not part of the fight-or-flight response?
reduced mental activity
The production of melatonin is inhibited by__________.