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TCU Hale Contemporary Issues in Biology Exam 4 Questions and Answers with Explanations (2026/2027)

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This document contains practice questions and verified answers for TCU Hale Contemporary Issues in Biology Exam 4 . It includes detailed explanations, revision-focused content, and exam preparation material suitable for 2026/2027 students.

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TCU Hale Contemporary Issues in Biology
Exam 4

L1. Your brain has how many lobes? - ANS4

L1. How many Americans age 5 and older are on antidepressants? - ANS27 million (9%)

L1. What is the most commonly take type of prescription drug? - ANSAntidepressants

L1. What percentage of Americans have ADHD? - ANS3-5%

L1. Among college students who takes more of the ADHD medication? People with ADHD or
People without - ANSPeople without

L1. What is the leading cause of disability among U.S. adults age 15-44? - ANSDepression

L1. By 2020 what will be the second leading cause of death behind heart disease? -
ANSDepression

L1. What is the fastest growing market for antidepressants? - ANSPreschoolers

L1. 80% of people with depression don't? - ANSSeek help

L1. Antidepressants increase the risk of what among children and young adults? - ANSSuicide

L1. What percentage of cases are antidepressants found to actually relieve depression
symptoms? - ANS35-40%

L1. Some reports suggest that antidepressants are only as effective as what? - ANSPlacebos

L1. Different situations cause depression, does this mean symptoms are different? yes or no -
ANSno (symptoms are the same)

L1. Antidepressants are more effective in people who have what? - ANSNeurotransmitter levels
that are consistently/significantly different from the norm

L1. Can you accurately measure a person's neurotransmitter levels? - ANSNo

L1. The War on Drugs is the United States' plan to do what? - ANSEradicate, Prohibit, and Jail
people involved with drugs

,L1. What percentage of Americans have used prescription drugs for non-medical purposes? -
ANS20%

L1. The prescription drugs that Americans use for non-medical purposes include what? -
ANSPainkillers, depressants, stimulants, and anabolic steroids

L1. What type of schooling has the highest percentage of students using stimulants
non-medically? - ANSElite schools

L1. Why do students use stimulants? - ANSTo focus, increase scores on some types of
cognitive tests, give students a competitive edge

L1. Why should students not use stimulants? - ANSLong term effects are unknown, may
become addictive, may increase risk of heart attack or stroke, decrease a person's sense of
accomplishment

L1. Why is cannabis illegal? - ANSPeople are thought to be violent, public knew little about it,
cannabis was seen as competition to alcohol, tobacco, and cotton industries

L1. Certain states allow for medical marijuana use- true or false? - ANSTrue

L1. Certain states allow for recreational marijuana use- true or false? - ANSTrue

L1. Is marijuana legal federally? - ANSNo

L1. What are some medical uses for cannabis? - ANSRelieves nausea and vomiting in
chemotherapy patients, improves appetite for HIV/AIDS patients, treats chronic pain and muscle
spasms

L1. What are recreational uses for cannabis? - ANSTo feel relaxed, to improve creativity

L1. Why should a person not use cannabis? - ANSLong term effects are unknown, short term
memory loss, impaired coordination/balance/reflexes, concerns about effects to
memory/cognition, potential for addiction or dependence

L1. What are symptoms of Clinical Depression? - ANSDepressed mood for most of the day,
fatigue, feelings of worthlessness/guilt, impaired concentration, insomnia, no interest in
activities, recurring thoughts of death/suicide, sense of restlessness, significant weight change

L1. How long does chronic depression last? - ANSAt least two years

L1. What is the possible cause of chronic depression? - ANSBrain changes that involve
serotinin

, L1. How many Americans that are 18 and older suffer from depression? - ANS14.8 million
people

L1. 1 in how many teens suffer from depression? - ANS8

L1. What is the third leading cause of death in 10 to 24 hours year olds? - ANSSuicide

L1. Is dementia a disease? - ANSNo

L1. How many brain functions must be affected to be considered dementia? - ANSTwo or more

L1. Dementia is often caused by what? - ANSOther diseases or events such as Alzheimer's,
Parkinson's, or strokes

L1. What can drugs do for dementia patients? - ANSImprove symptoms or slow the disease

L1. How many American's are living with Alzheimer's? - ANS5 million

L1. Why is there an increase in the number of Alzheimer patients? - ANSAging baby boomers

L1. Is there a cure for Alzheimer's? - ANSNo

L1. How much funding does Alzheimer's research receive per year? - ANS5 million dollars

L1. What are the risk factors for Alzheimer's? - ANSAge, family history, genetics

L1. What causes Alzheimer's disease? - ANSPlaques accumulating between brain neurons and
tau proteins twisting inside neurons causing damage (Neurofibrillary Tangles)

L2. Which significant fires occurred in 1871? - ANSPeshtigo Fires

L2. How did the Peshtigo fires' start? - ANSSmall fires were used to clear land for farming and
railroads and they escalated

L2. What year did the U.S. government begin setting aside national forest reservations? -
ANS1891

L2. What year was the U.S. forest service was created? - ANS1905

L2. What does the U.S. Forest Service do? - ANSProtect forest

L2. What happened in 1910? - ANSThe Great Fire of 1910

L2. How many people were killed in the Peshtigo fires in 1871? - ANS1500 to 2500

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