Answer:
A- Acetylcholine is released by axon terminals of the motor neuron.
Explanation:
The general mechanism of muscle contraction can be explained as follows:
a) The action potential which is generated, travels along the motor nerve to its ends on muscle fiber (or motor end plate) at the neuro-muscular junction.
b) The nerve endings then secrete small amounts of neurotransmitter called acetylcholine.
c) The actylecholine binds to the receptors on the membrane of muscle fiber and opens the voltage gated sodium channels.
d) Opening of these channels leads to flow of large quantities of sodium ions into the muscle fiber which ultimately results in initiation of action potential in muscle fiber.
e) This action potential depolarizes the fiber including the T-tubules, triggering the release of calcium ions from sarcoplasmic reticulum.
f) The calcium ions thus released initiated the process of muscle contraction.
Answer:
This type of secretion is known as Holocrine. Whereby the entire cell and content is released
They may have ran out of oxygen, or they may not have been water dwelling snails, as not all are, lack of food, no flow of water into and out of the tank would cause them to run out of oxygen.
There are several ways energy could run an electric circuit. but the fundamental way is either through a/several wiring. in a house you need to install <span>an electric circuit and connect it via wires throughout other outlets or electrical panels in the house. HOPE THIS HELPS!!</span>
Answer:
The wing of a bald eagle is
Explanation:
The wing of a bald eagle is TWICE THE SIZE OF A BUTTERLY WING.
