BIO 132 Name: ______
Spring ‘03
Dr. Rechs
Exam IV
(100 pts)
Multiple-choice (3 pts each)
1) Which of the following statements is true?
A) Hunger is controlled only by the levels of glucose in the blood.
B) Leptin levels are used to control short-term regulation of energy.
C) Leptin is secreted mainly by the pancreas.
D) The body has a set point for fat storage.
E) Leptin is one of the oldest known chemical signals.
2) Which of the following statements is true?
A) Injection of leptin into any obese mouse would make it thin.
B) The lipostatic hypothesis states that energy intake must always be greater than energy expenditure.
C) Blocking leptin receptors in a healthy animal would make it become thin.
D) Fat cells secrete leptin to signal the brain about the body’s energy stores.
E) None of the above is true.
3) Which of the following statements is true?
A) The more the stomach is stretched and distended the more we feel satiated (less hungry).
B) As CCK levels increase so does the feeling of hunger.
C) As glucose levels in the blood increase so does the feeling of hunger.
D) It is the arcuate nuclei of the hypothalamus that seem to be responsible for eating behavior.
E) All of the above are true.
4) Which of the following statements is true?
A) Fen-Phen was an appetite surpressant that lowered the levels of serotonin in the blood.
B) Serotonin levels are higher after a meal than before the eating the meal.
C) Blocking the reuptake of serotonin into platelets will cause an increase in hunger.
D) All of the above are true.
E) None of the above is true.
5) A female rat exposed to high levels of testosterone during development…
A) will develop a masculinized brain and exhibit male-like behaviors.
B) will only be able to have male offspring.
C) will genetically become a male rat.
D) All of the above are true.
E) None of the above is true.
6) The studies looking at Prairie and Montane voles demonstrated that...
A) some species of mammals are good and some are evil.
B) hormones acting on the brain can profoundly influence behavior.
C) vasopressin not only stimulates uterine contractions but pair-bonding in humans.
D) humans are naturally monogamous.
E) None of the above is true.
7) Which of the following statements is true?
A) Females normally produce testosterone.
B) It is possible for a male to not develop a “male” brain.
C) It is possible for a female to develop a “male” brain.
D) All of the above.
E) None of the above.
8) True or False? The corpus callosum is 12% larger in men compared to women.
A) True
B) False
9) True or False? Serotonin is thought to activate the reward system that is different than the pleasure system.
A) True
B) False
10) Which of the following statements is true?
A) The medial portion of the hypothalamus seems to be responsible for affective aggression.
B) A cat displaying predatory aggression will have an increased activation of the sympathetic NS.
C) The Cannon-Bard theory of emotion states that we feel sad because we cry.
D) All of the above.
E) None of the above.
11) True or False? Blocking 5-HT1A and 1B receptors has been shown to decrease aggression.
A) True
B) False
12) Which of the following statements is true?
A) As a brain becomes more active its EEG waves become slower and have larger amplitudes.
B) It is now possible to record the EEG activity of a single neuron from the scalp’s surface.
C) A larger EEG wave means that more neurons are firing.
D) A larger EEG wave means that the amplitude of action potentials are getting larger.
E) A smaller EEG wave means that neuronal firing is less synchronous.
13) Which of the following statements is true?
A) The function of brain rhythms is unknown & may just be an artifact of neuronal interconnectivity.
B) Cells with pacemaker activity in the thalamus may be the source of much of the brain rhythms.
C) If synchronous brain activity becomes too large is may result in a seizure.
D) All of the above are true.
E) None of the above is true.
14) Which of the following statements is true?
A) During Non-REM sleep is when dreaming most often occurs.
B) During Non-REM sleep EEG waves are small and fast.
C) During Non-REM sleep the body is paralyzed.
D) During REM sleep is when Theta waves are seen.
E) None of the above.
15) True or False? The Non-REM portion of the sleep cycle becomes longer as sleep continues.
A) True
B) False
16) Which of the following statements is true?
A) The monthly fluctuations in body function are called the circadian rhythms.
B) Some retinal neurons make direct connections with the suprachiasmatic nucleus.
C) “Night people” probably have a circadian cycle that is shorter than 24 hours.
D) A horse’s circadian rhythm is three hours long.
E) None of the above.
17) True or False? Blind people don’t have circadian rhythms.
A) True
B) False
18) Which of the following statements is true?
A) Destruction of Broca’s area bilaterally results in the inability to communicate vocally.
B) In deaf people destruction of Wernicke’s area results in the inability to understand language.
C) Destruction of Broca’s area results in the inability to write.
D) All of the above are true.
E) None of the above is true.
19) True or False? A person with a cut corpus callosum cannot describe objects shown in their right visual field.
A) True
B) False
20) Which of the following statements is true about attention?
A) It speeds neuronal processing of external stimuli so that you can understand it better.
B) It enhances the detection of external stimuli.
C) It is doesn’t have to be directed at the center of your vision.
D) All of the above are true.
E) None of the above is true.
21) Which of the following statements is true?
A) Consolidation causes long-term memories to become short -term memories.
B) Ca2+ entry via an NMDA channels may strengthen neuronal connections needed for consoldation.
C) Hebb’s theory of memory is that memories of an event are most likely stored in a single cell.
D) All of the above are true.
E) None of the above is true.
22) True or False? Declarative memories are much easier to learn and forget than are nondeclarative memories.
A) True
B) False
Short answer:
23) (10 pts) In an effort to become more thin, Zelda takes daily injections of leptin.
A. What specific brain area will detect Zelda’s elevated leptin levels?
B. What types of neurons will be activated?
C. What will be the humeral, visceromotor and somatic motor effects of Zelda’s elevated leptin levels?
24) (4 pts) Zippy says to his roommate that women are better at verbal tasks and that men are better at three-dimensional spatial tasks.
A. Which hemispheres are thought to be responsible for carrying out these tasks in most people?
B. Why should Zippy’s statement be considered suspect?
25) (8 pts) What brain area seems to be responsible for the emotions of fear and anxiety?
What are three pieces of evidence that have been found to support this?
26) (4 pts) You learn that your new neighbor has retrograde amnesia of declarative memories. Describe his symptoms.
27) (8 pts) How would your hypothalamus respond if you became too hot? (list all of the responses and the brain areas involved)
Extra credit (4 pts) Cells taken from the suprachiasmatic nucleus and grown in a dish still show an internal cycle that is about 24 hours in length. If the light cycle of the room were set to 10 hours of light and 10 hours of dark, would the cells in the dish eventually show a 20 hour cycle instead of a 24 hour cycle? Explain your logic.
Have a great summer!