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Tactile discs, also known as Merkel cells, are specialized mechanoreceptors in the skin that detect light touch and texture, playing a crucial role in the sense of touch. They are located in the epidermis and are closely associated with nerve endings. Langerhans cells, on the other hand, are a type of dendritic cell found in the skin that function primarily in the immune response by capturing and presenting antigens to T cells, thereby helping to protect the body against pathogens. Together, these cells contribute to both sensory perception and immune defense in the skin.
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Which receptors are modified free-nerve endings found in the deeper levels of the epidermis?
Modified free-nerve endings in the deeper levels of the epidermis are found associated with tactile (Merkel) cells. These receptors are sensitive to light touch and pressure stimuli, providing information about tactile sensations to the brain.
Who discovered the islets of langerhans of huan body?
The islets of Langerhans were named after the German pathologist Paul Langerhans, who first described them in 1869. He recognized these clusters of cells in the pancreas that are important for the production of hormones like insulin.
Which epidermal layer has the highest concentration of Langerhans' cells and has numerous desmosomes and thick bundles of keratin filaments?
The epidermal layer with the highest concentration of Langerhans' cells is the stratum spinosum. This layer is characterized by its numerous desmosomes, which provide strong intercellular connections, and thick bundles of keratin filaments, contributing to the skin's structural integrity and barrier function. Langerhans' cells play a crucial role in the immune response within the skin.
What are articular discs composed of?
Articular discs are composed of fibrocartilage, which is a combination of dense connective tissue and cartilage. They have a dense outer layer for strength and a more cartilaginous inner layer for flexibility. These discs are found in joints where they help improve the joint's stability and function.
What is the flowing substance that comes out of the islets of langerhans?
Insulin is the hormone that is secreted by the beta cells in the islets of Langerhans in the pancreas. It helps regulate blood sugar levels by facilitating the uptake of glucose into cells for energy.
What are the 3 types of unencapsulated tactile receptors?
The three types of unencapsulated tactile receptors are free nerve endings, root hair plexuses, and tactile discs. Free nerve endings are found throughout the skin and detect pain and temperature. Root hair plexuses are located around hair follicles and detect hair movement. Tactile discs are found in the deeper layers of the skin and detect light touch and pressure.
What part of the pancreas is responsible for its endocrine function?
islets of Langerhans
Which receptors are modified free-nerve endings found in the deeper levels of epidermis?
tactile (Merkel) discs
What is the function of tactile?
Functions as a sensory receptor for touch.
What is the function of antennules in crayfish?
Antennules are for smell. Antenna are tactile.
Which receptors are modified free-nerve endings found in the deeper levels of the epidermis?
Modified free-nerve endings in the deeper levels of the epidermis are found associated with tactile (Merkel) cells. These receptors are sensitive to light touch and pressure stimuli, providing information about tactile sensations to the brain.
What is the function of Merkel's discs?
It is a light touch receptor.
What is the birth name of Ryan Langerhans?
Ryan Langerhans's birth name is Ryan David Langerhans.
What is the origin of the surname Langerhans?
Langerhans is a Germanic name.
What do vertebral discs provide to the spinal cord?
The main function of the discs is to provide cushion and a sort of filler for the crack between vertebrae.
What does the Islets of Langerhans do and where is it located?
The Islets of Langerhans is located in the pancreas.
How tall is Ryan Langerhans?
Ryan Langerhans is 6' 3".
