1. what is the function of the reticular formation where is it located?
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Sleep and consciousness: The reticular formation has projections to the thalamus and cerebral cortex that allow it to exert some control over which sensory signals reach the cerebrum and come to our conscious attention. It plays a central role in states of consciousness like alertness and sleep.
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Ascending tracts (Figure 3.8). The nerve fibers comprise the ascending tract emerge from the first order (1°) neuron located in the dorsal root ganglion (DRG). The ascending tracts transmit sensory information from the sensory receptors to higher levels of the CNS.
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Chemical Composition: Endoplasmic reticular membranes contain high lipid content in relation to its protein partners. The common lipids found are phospholipids, phosphotidyl inositol, neutral lipids, sulfolipids, cholesterol and some phytosterols.
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Orientation: The utricle is one of two "otolithic organs" in the human ear, the utricle and saccule. On the diagram above, the utricle are located in the vestibule, between the semicircular canals (5), and the cochlea (9). This figure shows a closeup of the inner ear.
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The ampullary cupula, or cupula, is a structure in the vestibular system, providing the sense of spatial orientation. The cupula is located within the ampullae of each of the three semicircular canals.
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The endoplasmic reticulum (ER) is a series of interconnected membranous tubules that collectively modify proteins and synthesize lipids. However, these two functions are performed in separate areas of the endoplasmic reticulum: the rough endoplasmic reticulum and the smooth endoplasmic reticulum, respectively.
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The function of T-TUBULES is to conduct impulses from the surface of the cell (SARCOLEMMA) down into the cell and, specifically, to another structure in the cell called the SARCOPLASMIC RETICULUM. ... But the primary function of the SARCOPLASMIC RETICULUM is to STORE CALCIUM IONS.
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Orbicularis oris. Located in the face, the orbicularis oris muscle controls movements of the mouth and lips. Specifically, it encircles the mouth, originating in the maxilla (upper jaw and palate) and mandible (lower jaw) bones. The muscle inserts directly into the lips.
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Smooth Endoplasmic Reticulum. The SER has a variety of functions that are often more prominent in certain cell types whose roles require an enhanced SER ability. Four common functions are the mobilization of glucose from glycogen, calcium storage, drug detoxification, and the synthesis of lipids.
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Rough endoplasmic reticulum is covered with ribosomes, the site of protein synthesis, whereas smooth endoplasmic reticulum (without ribosomes) is the site for lipid synthesis. ... In addition to lipid synthesis, sER is involved in the synthesis of steroid hormones and the detoxification of drugs.
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Ribosomes on the rough endoplasmic reticulum are called 'membrane bound' and are responsible for the assembly of many proteins. This process is called translation. Certain cells of the pancreas and digestive tract produce a high volume of protein as enzymes.
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In the brain, the corpora quadrigemina (Latin for "quadruplet bodies") are the four colliculi—two inferior, two superior—located on the tectum of the dorsal aspect of the midbrain. They are respectively named the inferior and superior colliculus. The corpora quadrigemina are reflex centers involving vision and hearing.
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The sarcoplasmic reticulum is a critical storage site for calcium ions, taking up the ions from the cytoplasm. It also releases calcium ions when the muscle cell is triggered by nerve stimuli, resulting in muscle contraction.
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Yes, absolutely. The endoplasmic reticulum is one continuous compartment. ... I don't know if there's a functional significance to this continuity, but in theory, a protein in the lumen of the SER could migrate through the RER and into the perinuclear space without having to go "outside" to get there.
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Juxtaglomerular Apparatus. The juxtaglomerular apparatus is a specialized structure formed by the distal convoluted tubule and the glomerular afferent arteriole. It is located near the vascular pole of the glomerulus and its main function is to regulate blood pressure and the filtration rate of the glomerulus.
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The endoplasmic reticulum (ER) serves important functions particularly in the synthesis, folding, modification, and transport of proteins.
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The stellate reticulum is a group of cells located in the center of the enamel organ of a developing tooth. These cells are star-shaped and synthesize glycosaminoglycans. As glycosaminoglycans are produced, water is drawn in between the cells, stretching them apart.