Too Much of a Good Thing. The vitamin A content in beef liver is very high, with 100 grams of raw liver containing over three times the recommended daily value. As a fat-soluble vitamin, vitamin A accumulates in your own liver and can cause serious health issues at high levels.
Acetylcholine is released when a nerve impulse reaches a myoneural junction. It diffuses across the synaptic cleft and binds to cholinergic receptors on the muscle fibers, causing them to contract. cholinesterase splits acetylcholine into its components, thus stopping stimulation of the muscle fibers.
acetylcholine is released from the end of the motor neuron. The first event in muscle fiber contraction is that. -the muscle fiber membrane is stimulated and a muscle impulse travels deep into the fiber through transverse tubules. -acetylcholine diffuses across a gap at a neuromuscular junction. -acetylcholine is released from the end of the motor neuron.