Brain Bee Study Guide ((new)) -

Originally published by The British Neuroscience Association, this text acts as a slightly more advanced companion to Brain Facts .

On the other side is your target: a in the ventral horn of the spinal cord, at the level of C5-C6 (imagine reaching for a cup). This LMN has ionotropic glutamate receptors — specifically, AMPA receptors (fast, Na+/K+) and NMDA receptors (slower, Ca2+ permeable, blocked by Mg2+ at rest).

Now zoom out. You are just one neuron in a universe of 86 billion. Other systems are running in parallel: brain bee study guide

communicate via neurotransmitters and the specific roles of the hindbrain, midbrain, and forebrain Sensory Perception: This is how you "see" the world. Dive into the mechanics of vision, audition (hearing), and somatosensation (touch)

Forget "soft" biology; this is electrochemistry. Now zoom out

The muscle fiber fires an action potential. on the T-tubule sense the voltage change and mechanically open ryanodine receptors (RyRs) on the sarcoplasmic reticulum. Calcium floods the cytosol.

Calcium binds to . Tropomyosin shifts away. Myosin heads — already loaded with ADP and Pi — bind to actin. Power stroke. Pi released. New ATP binds, myosin releases actin, then hydrolyzes ATP to recock the head. Dive into the mechanics of vision, audition (hearing),

You must know your way around the lobes. Beyond the basics, focus on the microscopic level—how

At the NMJ, the enzyme — sitting on the basal lamina — rapidly cleaves ACh into acetate and choline. Choline is taken back up into the LMN via the choline transporter (CHT1) , then reused.