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This article provides an overview of neuron structure and function in the human nervous system.
Learn about the structure and function of neurons in this informative video from Khan Academy.
Anatomy of a neuron. Overview of neuron structure and function. The membrane potential. Electrotonic and action potentials. Saltatory conduction in neurons. Neuronal synapses (chemical) The synapse. Neurotransmitters and receptors. Q & A: Neuron depolarization, hyperpolarization, and action potentials.
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Course: Middle school biology > Unit 1. Lesson 2: Cell parts and functions. Cell parts and their functions. Comparing animal and plant cells. Cell parts and functions. Understand: cell parts and functions. Apply: cell parts and functions.
Anatomy of a neuron. Structure of the nervous system. Functions of the nervous system. Introduction to neural cell types. Overview of neuron function. Synapse structure. Neuronal synapses (chemical) Types of neurotransmitters. Types of neurotransmitter receptors.
Understanding the structure of a muscle fiber. There are six actin molecules around a single myosin molecules and there are more than 100,000 sarcomeres (one myosin and six actin make 1 sarcomere) in a single bicep muscle fibre (a single cell) and 253000 such fibres in a young man's bicep.
Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic information. The cell membrane forms the boundary that controls what enters and leaves the cell. In plant cells, chloroplasts enable photosynthesis and the cell wall provides structure.
The motor unit, made up of lower motor neurons and skeletal muscle cells, plays a vital role in muscle contraction. Lower motor neurons, located in the spinal cord and brain stem, send signals to skeletal muscles via neuromuscular junctions. Abnormalities in these motor units can lead to muscle atrophy, fasciculations, hypotonia, and hyporeflexia.
Anatomy of a neuron. Overview of neuron structure and function. The membrane potential. Electrotonic and action potentials. Saltatory conduction in neurons. Neuronal synapses (chemical) The synapse. Neurotransmitters and receptors. Q & A: Neuron depolarization, hyperpolarization, and action potentials.