Gaba functions as the major excitatory neurotransmitter in the brain the neurotransmitter responsible for slowing intestinal activity during stress an inhibitory neurotransmitter in the brain the major neurotransmitter involved in voluntary movements

answer an inhibitory neurotransmitter in the brain;

4

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.