Why your brain tires when exercising
We have always known that the neurotransmitter ... important as they are responsible for ensuring contact between the brain and the muscles. Every time a motoneuron sends impulses to the muscles, it leads to the contraction of the muscle fibres contacted ...
What an Adrenaline Rush!
This activation triggers the adrenal glands which secrete the neurotransmitter and ... Your sympathetic nervous system is responsible for regulatory functions in the body such as your heart rate, muscle contraction, blood vessel and air passages and ...
Botox: the muscle and emotional paralyzer
It attaches itself to nerve endings and blocks the release of ACh, the neurotransmitter responsible for triggering muscle contractions. If it attacks and paralyzes the chest muscles, it could have a profound impact on the ability to breathe, which could be ...
C2006/F2402 '11 -- Outline for Lecture 21
Muscle structure and contraction ... handouts 19A (nerve/smooth muscle) and 18 (nerve/skeletal muscle). Presynaptic Side: Neurons have multiple varicosities (points of contact with smooth muscle -- contain vesicles of neurotransmitter).
What is Syria's chemical weapon?
OPINION: The world is waiting for the Obama administration to decide whether to bomb Syria in retaliation for the use of the chemical weapon sarin ... the breakdown of a specific neurotransmitter resulting in millions of contractions per signal from ...