Acetylcholine and nor-adrenalin are two types of _ used in our nervous system.
Correct answer: D. Neurotransmitters
- A. Horrnones
- B. Channel and carrier proteins in the cell membrane of a neuron
- C. Enzymes
- D. Neurotransmitters
Explanation
Acetylcholine and norepinephrine (noradrenaline) are both types of neurotransmitters used in the nervous system. Neurotransmitters are chemical messengers that transmit signals between neurons and from neurons to other cells, such as muscle cells, by binding to receptors on postsynaptic membranes.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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