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Gastric chief cells (as opposed to the chief cells present in the parathyroid gland) are the zymogen cells in the stomach that release pepsinogen (a precursor (zymogen) of pepsin). Without stimulation chief cells normally secrete pepsinogen at about 20% of the maximum ability.
ACh (released by nerves) is the most important pathway for gastric chief cell activation.
ACh also stimulates parietal cells, which secrete HCl (stomach acid). The fall in pH causes a reflex which further stimulates chief cells.
Alternatively, acid in the duodenum (the first portion of the small intestine), stimulates release of secretin from S cells of the small and large intestine. Secretin also activates gastric chief cells.
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What is activated by the movement of the perilymph?
Hair Cells
Do activated Tc cells only turn in to cytotoxic T-lymphocytes or do Tc differentiate into memory cells as well?
Activated Tc cells can proliferate into cytotoxic t-lymphocytes and Memory cytotoxic t cells as well.
Gastrin secretes what?
pepsinogen (a precursor of pepsin) which helps humans digest, when activated by HCL.
What does a B-cell become when activated?
When B cells become activated they differentiate into two types of cells: plasma cells and memory cells. Plasma cells produce antibodies while memory cells linger in the system so if there is ever an invasion that the body has encountered before the body will know exactly how to destroy the pathogen.
Which White blood cells that activate plasma cells?
Plasma Cells are, in fact White Blood Cells - they are a special group of Lymphocytes. Plasma Cells are also known as "Effector-B Cells" and are activated by the presence of antigens in the body
What do chief cells do?
Chief cells secret pepsinogen and gastric lipase. Pepsin, the activated form of pepsinogen, can break down proteins into peptides and gastric lipase can break down trigylcerides into fatty acids and monoglycerides.
What do chief cells in the stomach secret?
The chief cells secret pepsinogen and gastric lipase. The activated form of pepsinogen (i.e. pepsin) can break down proteins into peptides. As for the lipase, it can split trigylcerides into fatty acids and monoglycerides.
What do chief cells secrets?
Chief cells secret pepsinogen and gastric lipase. Pepsin, the activated form of pepsinogen, can break down proteins into peptides and gastric lipase can break down trigylcerides into fatty acids and monoglycerides.
What cells produce pepsinogen and hcl?
Chief cells of the stomach (gastric glands in stomach have chief cells)
What is activated by the movement of the perilymph?
Hair Cells
When B-cells are activated they divide to form antibody-producing cells called?
Plasma cells.
Do activated Tc cells only turn in to cytotoxic T-lymphocytes or do Tc differentiate into memory cells as well?
Activated Tc cells can proliferate into cytotoxic t-lymphocytes and Memory cytotoxic t cells as well.
T cells and B cells activated only by what?
exposure to a specific antigen at a specific site in a plasma membrane.
What do parietal cells and chief cells produce together?
Parietal cells produce cover cells and chief cells produce micro and megaspores
What in the ear is activated by the movement of the perilymph?
Hair cells
What is the shape of the chief cells of skeletal muscles?
The shape of the chief cells of the skeletal muscles is that they are tube-shaped.
What makes brain cells different from other body cells?
they are different time are activated
