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.
Nerve endings of the autonomic nervous system that secrete the neurotransmitter epinepherine and norepinephrine. Part of the adrenal gland that is directly controlled by the sympathetic nervous system neurons. The cells respond to the stimulation by releasing epinephrine (80%) and norepinephrine (20%). located in terminal ganglia. small ganglia located right next to target tissue. short unmyelinated axons, release ach, cholinergic fibers.