Step 2a: Action potential generation 00- Cell body 00 outside 00-00-00-00-00 Step 2b: Signaling Target Cell Cell body inside 00-00-00-00-00 outside outside 00-0000-0000 inside Axon terminals Axon terminals 00-0000-0000 outside In each image, indicate position of each channel/pump listed by pasting in correct color and indicate whether they are closed (use line to close pore) or open (use arrow to indicate direction of movement). Include + and - signs inside and outside of cell to indicate relative charge. Describe what happens at each step as an action potential moves along a neuron. Neurotransmitter-gated Na+ channel Voltage-gated Na+ channel Voltage-gated K+ channel closed open, signify direction Step 0: Resting Potential ·00- Cell body 00 + relative charge Step 1: Receipt of Signal by Cell Cell body outside 00-00- -00-00- 00-00- inside Na+/K+ pump Voltage-gated Ca²+ channel outside K leak channel -00-00- inside -00 Axon terminals -00 00-00-00-00 00 Axon terminals 00-00-00-00-00 outside
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
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