Epinephrine and norepinephrine that are released from the adrenal glands affect target tissue for a longer period of time than the same substances released from neurons at their peripheral receptors. Why?
◦ The epinephrine and norepinephrine from the adrenal glands are released by sympathetic neurons, whereas parasympathetic neurons release these substances at the effector organs.
◦ The effectors are less sensitive to epinephrine and norepinephrine released by the adrenal glands.
◦ The adrenal gland releases larger amounts of the neurotransmitters than the neurons.
◦ There are no enzymes to break down epinephrine and norepinephrine in the blood and very little in peripheral tissues.
◦ The hormones released from the adrenal glands bind to different receptors than those released from neurons.
Abnormal Growth in Mice Mammary Tissue
Type II Tissue Specific Reactions
Feedback control of the adrenal cortex.
Pituitary Hormones and Their Target Cells, Tissues, and Organs
Adrenal Glands
Structure of the human adrenal gland