Exocrine And Specialised Glands Flashcards
What’s the function of a striated duct?
Striated ducts prevent water loss.
Describe parasympathetic salivary gland response.
Produces a large volume of watery saliva, rich in enzymes.
Describe sympathetic salivary gland response.
Produces a small, thick secretion of saliva, rich in mucus.
How do submandibular glands split?
Into two parts: superficial and deep which are separated by the mylohyoid muscle.
Differentiate between parotid, submandibular and sublinguinal gland.
Parotid: almost totally serous. Submandibular: mostly serous, more mucous. Sublingual: almost totally mucous.
What is sinusoid tube?
An irregularly shaped tube through which blood passes.
What are the different types of capillary vessel.
Continuous: Brain/most of body. Fenestrated: Pituitary/SI/kidneys/some exocrine glands. Sinusoid: Spleen/bone marrow/liver/lymph nodes.
What is a portal triad made up of and where is it found?
Made up of a hepatic artery, bile duct, and a portal vein. Other structures found are nerves, lymphatic vessels and fat. It is found in the liver.
What are kupffer cells and what’s their role?
Specialised macrophages that patrol the sinusoids, recycling old rbcs and ingesting pathogens. They migrate into liver tissues at sites of inflammation and damage.
What happens to stellate cells in liver cirrhosis?
They lose their vitamin A storage capability and differentiate into myofibroblasts. These deposit collagen in perisinusoidal space leading to liver fibrosis.
What are some functions of the liver?
Storage: metal, vitamins ADEK, sugars. Anabolism: Amino acid synthesis. Catabolism: drugs, hormones, haemoglobin. Other: bile production.
