The end of a neuron, where acetylcholine-filled vesicles are located, is called the
When an action potential reaches the axon terminal of a motor neuron, vesicles carrying neurotransmitters (mostly acetylcholine) are exocytosed and the contents are released into the neuromuscular junction.These neurotransmitters bind to receptors on the postsynaptic membrane and lead to its depolarization.he small depolarization associated with the release of acetylcholine from one synaptic vesicle is called a miniature end-plate potential (MEPP). MEPPs are additive and lead to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs). In the absence of an action potential, acetylcholine vesicles spontaneously leak into the neuromuscular junction and cause very small depolarizations in the postsynaptic membrane. This small response (~0.5mV) is called a miniature end plate potential (MEPP) and is generated by one acetylcholine-containing vesicle.he small depolarization associated with the release of acetylcholine from one synaptic vesicle is called a miniature end-plate potential (MEPP). MEPPs are additive and lead to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs). Acetylcholine receptors are primarily located __________. on the motor end plate. Receptors for acetylcholine are located on the motor end plate -- the portion of the muscle fiber's sarcolemma that faces the neuron's synaptic terminal.Binding of acetylcholine to acetylcholine receptors increases the sodium permeability of the motor end plate.This causes sodium to rush into the muscle fiber, which generates a muscle action potential. An action potential in the muscle fiber causes __________.inding of acetylcholine to acetylcholine receptors increases the sodium permeability of the motor end plate. This causes sodium to rush into the muscle fiber, which generates a muscle action potential. Inside a neuron, acetylcholine is contained within __________. vesicles. (When an action potential arrives at the synaptic terminal, these vesicles fuse with the neuronal plasma membrane, releasing acetylcholine into the synaptic cleft.inding of acetylcholine to acetylcholine receptors increases the sodium permeability of the motor end plate. This causes sodium to rush into the muscle fiber, which generates a muscle action potential. When an action potential causes the release of many acetylcholine vesicles, acetylcholine diffuses across the neuromuscular junction and binds to ligand gated nicotinic receptors (non-selective cation channels) on the muscle fiber.he small depolarization associated with the release of acetylcholine from one synaptic vesicle is called a miniature end-plate potential (MEPP). MEPPs are additive and lead to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs). The small depolarization associated with the release of acetylcholine from one synaptic vesicle is called a miniature end-plate potential (MEPP). MEPPs are additive and lead to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs).he small depolarization associated with the release of acetylcholine from one synaptic vesicle is called a miniature end-plate potential (MEPP). MEPPs are additive and lead to a greater depolarization of the postsynaptic membrane and become end plate potentials (EPPs). Hemidesmosomes are located on the inner surface of basal plasma membranes and are in contact with the basal lamina in epithelia exposed to extreme stress (stratified squamous). In these strong attachments, integrins mediate a connection between the basal lamina and intermediate filaments of epithelial cells.he mesoderm also gives rise to the vascular system, that is, the heart, arteries, veins, lymph vessels, and all blood and lymph cells. Furthermore, it gives rise to the urogenital system— kidneys, gonads, and their ducts (but not the bladder). Finally, the spleen and suprarenal glands are mesodermal derivatives. 1 43. • 2  At the surface of epithelium, the plasma membrane are embedded in the lipid layer of membrane, these are glycoprotein. • 3  It is believed that these glycoproteins make the membrane impervious & resistant to toxic effects of substance present in urine. 2. • Perichondrium separates cartilage from surrounding tissues Functions: • It supports soft tissues, coz it is smooth surface and resilient. • 2  Acts as a shock absorber and sliding area for joints and facilitates bone movements. 2. The smooth endoplasmic reticulum is suspended in the cytoplasm of many cells and is especially abundant in cells synthesizing steroid hormones (in the adrenal cortex and gonads). It is also abundant in liver cells (hepatocytes), where it is involved in glycogen metabolism and drug detoxification.he mesoderm also gives rise to the vascular system, that is, the heart, arteries, veins, lymph vessels, and all blood and lymph cells. Furthermore, it gives rise to the urogenital system— kidneys, gonads, and their ducts (but not the bladder). Finally, the spleen and suprarenal glands are mesodermal derivatives. 1 7. 2  EpithElial tissuE • Epithelium: The outer surface of the body & the luminal surfaces of cavities within the body are lined by one or more layers of cells that completely cover them. 3  Such layers of cells are called epithelial tissue. 2. • Perichondrium separates cartilage from surrounding tissues Functions: • It supports soft tissues, coz it is smooth surface and resilient. • 2  Acts as a shock absorber and sliding area for joints and facilitates bone movements. 2.
A miniature end-plate potential (MEPP)