Answer:
Nerve impulse
Explanation:
A nerve impulse is transmitted through the synaptic cleft by acetylcholine. When an impulse reaches the synaptic knob, it stimulates the vesicles to move towards the presynaptic membrane releasing the acetylcholine. The transmitter substance makes the membrane permeable. An action potential is then formed along the neuron.
Answer:
There are three general types of symbiosis: <em>mutualism, commensalism, and parasitism.</em> Based on the nature of the interaction between organisms, symbiotic relationships are loosely grouped into one of these types. Mutualism is a mutually beneficial relationship in which both organisms benefit.
P<span>ituitary hormones:
1. Act on breasts to induce milk production.
2. Make you sweat.
3. Can cause weight gain.
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genome chromosome gene base pair
2.5 million years ago the first genus Homo evolves.
