Discuss some of the events that occur during the three trimesters of pregnancy.

Some events that occur during the first trimester are nausea, fatigue, breast tenderness and frequent urination. Some may also experience an increased energy level during this period, others may feel very tired and emotional.

Some events that occur during the second trimester are decreased nausea, better sleep patterns and an increased energy level. Sometimes back pain, abdominal pain, leg cramps, constipation and heartburn.

As for the third trimester, some events that occur during this trimester are shortness of breath, hemorrhoids, urinary incontinence, varicose veins and sleeping problems.

a. steroid--> influences moods in the limbic system

b. inhalant--> dissolves fatty tissue in the brain

c. marijuana--> changes how the hippocampus processes sensations

psychological stress is stress that happens when a persons mind and emotons respond to stress. an ideal answer for this question woud be increased heart rate.