Tumors tend to occur in the limbs of large and giant breed dogs. Osteosarcoma tumors can spread from the bone to distant sites in the body, including the lungs, lymph nodes, and other bones. This type of cancer is painful, and amputation of the affected limb is necessary to provide relief.
At the center of the adrenal glands we see the adrenal medulla. This portion of the gland is stimulated by the sympathetic nervous system to secrete catecholamines, which are hormones that help you deal with short-term stress. There are two catecholamines. One is called epinephrine or adrenaline.
The inner part of the adrenal gland. The adrenal medulla produces the hormones epinephrine (adrenaline), which stimulates the heart, tightens blood vessels, and relaxes some smooth muscles; and norepinephrine, which has similar effects.drenal medulla, the inner portion of the adrenal gland. Its cells secrete the catecholamines epinephrine and norepinephrine when stimulated by the sympathetic division of the autonomic nervous system.