Answer: The correct answer for the blank is- d. inhibitory neurotransmitter.
Neurotransmitters are the chemical messengers in the body, which are released by the axon terminal of neuron ( also called nerve cell) and transmit nerve impulse to the neighboring cell ( which could be a muscle cell or a nerve cell) .
There are primarily two types of neurotransmitters that are-
1) Excitatory neurotransmitter and 2) Inhibitory neurotransmitter.
Inhibitory neurotransmitter have inhibitory effects on the neuron that is they reduce the chances that a neuron will fire an action potential. In other words, they are responsible for slowing signals between neurons.
Example- The most common inhibitory neurotransmitter is GABA ( gamma amino butyric acid)
Answer:
Gravitational
Explanation:
The gravitational pull of the moon generates the tidal force by causing the Earth's water to bulge out on the side closest to the moon. The bulges of water are called high tide.
Speciation caused by gene flow is called SYMPATRIC SPECIATION.
Sympatric speciation is said to occur when speciation occurs in a population that live in the same geographical location. This type of speciation usually occur because of reduction in gene flow, that is caused by factors such as habitat differentiation, sexual selection and polyploidy.<span />
The answer is A because it is not like an alkaline which takes up hydrogen ions. Also having a low ph value is what causes something to become acidic so it is not B. Your answer is A
