Table of Contents
What is the function of an exocrine gland cell?
A gland that makes substances such as sweat, tears, saliva, milk, and digestive juices, and releases them through a duct or opening to a body surface.
What are 3 types of exocrine gland cells that secrete into the lumen?
There are three different ways in which exocrine glands secrete their products. These modes of secretion are called merocrine, apocrine, and holocrine.
Why do they observe silver grains in the mitochondria or in the ER at later time points?
Exposed silver grains are seen over the RER where the amino acids are incorporated into proteins. You homogenize a liver cell and isolate from it vesicles derived from the endoplasmic reticulum. When their biochemistry is analyzed, they are found to contain oxygenases. From what type of ER are they derived.
What is an electron micrograph biology?
Electron micrograph. (Science: microscopy) a photographic reproduction of an image formed by the action of an electron beam. Electron microscope.
What is a micrograph image?
A micrograph is a type of digital image or photograph captured through magnification devices such as a microscope. Its purpose is to present a magnified picture of a particular object.
Why do exocrine glands have ducts?
Exocrine glands have ducts that carry their secretory product to a surface. These glands include the sweat, sebaceous, and mammary glands and, the glands that secrete digestive enzymes.
Where are exocrine glands?
Exocrine glands secrete enzymes, ions, water, mucins and other substances into the digestive tract. The glands are situated within the gastrointestinal tract, in the walls of the stomach and intestines, or outside it (salivary glands, pancreas, liver, see above). Secretion is under the control of nerves and hormones.
What are the 2 types of exocrine glands?
The three types of exocrine glands are:
- Holocrine Glands.
- Merocrine Glands.
- Apocrine Glands.
What do unicellular exocrine glands secrete?
Structural classification Goblet cells are unicellular exocrine glands; so named for their shape, these glands secrete mucus and are found in the epithelial lining of the respiratory, urinary, digestive, and reproductive systems.
Why are mitochondria rod shaped?
Mitochondria Structure Mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes. The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae.
Where are mitochondria located in the cell?
cytoplasm
Mitochondria are structures within cells that convert the energy from food into a form that cells can use. Each cell contains hundreds to thousands of mitochondria, which are located in the fluid that surrounds the nucleus (the cytoplasm).