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During the period of rest, i. e., no secretion flowing from the duct, and the gland being pale, the gland cells in the acini undergo a change which may be compared with that observed in the cells of the serous salivary glands. The division of the row of cells lining the acinus, into a central granular and outer clear zone, has already been mentioned.
Immediately after very active secretion, the central granular zone is reduced to a minimum, owing to the paucity of granules; and the outer zone occupies the greater part of the cell, the entire substance of which stains readily and looks like ordinary protoplasm. After rest, however, the granules reappear, and after the lapse of a short quiescent period, the inner granular zone has again encroached on the outer, owing to the accumulation of granules which, rapidly increasing, fill the greater part of the cells, and cause them to bulge inward and occlude the lumen of the gland. As digestion proceeds, the cells undergo a slight change in form, so that each individual cell is more distinctly seen, and its angles are retracted, giving a notched appearance to the margin of the acinus. The blood supply during this period is much increased, red arterial blood flowing from the veinlets of the gland. At the same time the granules are diminished in number, escaping at the free central margin of the cells into the lumen, toward which they appear to crowd, leaving the outer zone once more clear and free from granules, while the lumen of the saccule and of the ducts is filled with secretion.
What else can I help you with?
Do lysosomes help in secretion?
Lysosomes are not involved in secretion. Lysosomes are organelles responsible for breaking down and recycling cellular waste and debris. Secretory vesicles are responsible for transporting materials for secretion out of the cell.
Where does secretion occur?
Tubular secretion occurs in the distal convoluted tubes. The secretion also happens in the collecting ducts and also in the proximal convoluted tubule.
Where is sandoval fluid in the human body?
Synovial fluid fills the area near a Synovial joint. The fluid is stringy and has egg like consistency. It lubricates the motion of the bones forming the joint. Other types of joints are cartilaginous joints and fibrous joints. Synovial joints themselves are of various types - such as gliding, hinge, pivot, saddle, ball and socket.
What is the function of epithal tissue?
Epithelial tissue forms the covering of the outside of the body, as well as the lining of the GI and respiratory tracts. It's functions include protection (skin), secretion (hormones, sweat, enzymes, etc.), and absorption (nutrients and water in the GI tract).
Proteins made and modified here for secretion from cell?
The endoplasmic reticulum (ER) is responsible for synthesizing and modifying proteins that are intended for secretion from the cell. These proteins undergo various post-translational modifications, such as glycosylation and disulfide bond formation, within the lumen of the ER before being transported to the Golgi apparatus for further processing and eventual secretion.
Do lysosomes help in secretion?
Lysosomes are not involved in secretion. Lysosomes are organelles responsible for breaking down and recycling cellular waste and debris. Secretory vesicles are responsible for transporting materials for secretion out of the cell.
Simple cuboidal cells are often involved in?
absorption and secretion in glands and kidney tubules due to their cube-shaped structure that allows for efficient exchange of molecules. They provide a protective lining in various organs such as the liver, thyroid, and pancreas to support their functions.
What is a secretion vesicle?
there is no such thing as a secretion vesicle.although there is a secretory vesicle;Which is a membrane bound vesicle derived from the Golgi apparatus and containing material that is to be released from the cell.
Is connective tissue primarily concerned with secretion?
No, connective tissue is primarily concerned with providing structural support, connecting and anchoring various tissues and organs in the body, and serving as a medium for transportation of nutrients and waste products. Some types of connective tissue, like adipose tissue, can also store energy. Secretion is a function typically associated with epithelial tissue.
Is a vesicle an organ or a organelle?
A vesicle is an organelle. It is a small, membrane-bound sac that transports and stores substances within a cell. Vesicles are involved in various cellular processes, such as secretion, transport, and storage of molecules.
What is the shape of the chief cells of the cuboidal epithelium?
Chief cells of the cuboidal epithelium are typically cube-shaped, with roughly equal height, width, and depth. They have a centrally located nucleus and are involved in the secretion of substances, such as digestive enzymes in the stomach. This cuboidal shape allows for efficient absorption and secretion functions within various glands and organs.
What is the difference between apical and basal surfaces of epithelial tissue?
The apical surface of epithelial tissue refers to the top layer that faces the external environment or the lumen of an organ, often involved in absorption, secretion, or sensation. In contrast, the basal surface is anchored to the underlying connective tissue and plays a role in attaching the epithelial layer to the basement membrane. This structural distinction is crucial for the function and organization of epithelial tissues in various organs.
What are some government programs for mortgage modification?
There are various programs the government offers for mortgage modification. A few programs available from the government to modify your mortgage include Obama's loan modification program and HUD.
Where does secretion occur?
Tubular secretion occurs in the distal convoluted tubes. The secretion also happens in the collecting ducts and also in the proximal convoluted tubule.
What is the purpose of secretion?
The purpose of secretion is to release substances, such as hormones or enzymes, from cells into the external environment or bloodstream for various physiological functions, like digestion, communication, and waste elimination.
Where is sandoval fluid in the human body?
Synovial fluid fills the area near a Synovial joint. The fluid is stringy and has egg like consistency. It lubricates the motion of the bones forming the joint. Other types of joints are cartilaginous joints and fibrous joints. Synovial joints themselves are of various types - such as gliding, hinge, pivot, saddle, ball and socket.
What gland releases its secretion into the bloodstream is called?
The gland that releases its secretion into the bloodstream is called an endocrine gland. These glands produce hormones that are released directly into the bloodstream to regulate various body functions.
