short note on smooth muscle tissue
Answers
Smooth muscle generally forms the supporting tissue of blood vessels and hollow internal organs, such as the stomach, intestine, and bladder. It is considered smooth because it does not have the microscopic lines (the striations) seen in the other two types of muscle
Hi Mate,
The autonomic nervous system innervates the vasculature, smooth muscle tissue, and parenchyma of organs of the immune system mainly through the sympathetic division. In the bone marrow and thymus, sympathetic fibers modulate cell proliferation, differentiation, and mobilization. In the spleen and lymph nodes, sympathetic fibers modulate innate immune reactivity, and the magnitude and timing of acquired immune responses, particularly the choice of cell-mediated (Th1 cytokines) as opposed to humoral (Th2 cytokines) immunity. Autonomic nerve fibers regulate immune responses and inflammatory responses in the mucosa-associated lymphoid tissue (MALT) in the lungs, the gut-associated lymphoid tissue (GALT), and the skin. Extensive neuropeptidergic innervation, derived from both the autonomic nervous system and the primary sensory neurons, also is present in the parenchyma of lymphoid organs. Many subsets of lymphoid cells express cognate receptors for catecholamines (alpha and beta receptor subsets) and neuropeptides; the expression of these neurotransmitter receptors is highly regulated by both lymphoid and neural molecular signals. Postganglionic sympathetic nerve fibers also directly innervate hepatocytes and fat cells. (Th = T helper cells).
Hope This Helps You......