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- Alcohol affects coordination by its effect on the ______. a. pons c. spinal cord b. cerebellum d. hypothalamusWatch this video (http://openstaxcollege.org/l/3Dmovies) to learn about the side effects of 3-D movies. As discussed in this video, movies that are shot in 3-D can cause motion sickness, which elicits the autonomic symptoms of nausea and sweating. The disconnection between the perceived motion on the screen and the lack of any change in equilibrium stimulates these symptoms. Why do you think sitting close to the screen or right in the middle of the theater makes motion sickness during a 3-D movie worse?Explain how decompensation develops and its effects onthe central nervous system.
- Parkinson disease is the result of decreased levels of theneurotransmitter dopamine in the brain. However, thesepatients can’t take dopamine in drug form because the drugcannot reach the brain. What anatomic structure preventsthe drug from reaching the brain? How could these sameanatomic structures be beneficial to an individual underdifferent circumstances?Mr. Wilson, age 85, lives in a care facility, where he is not very mobileand is often lethargic. One day an aide noticed that he was sitting inhis usual chair but appeared to be unconscious. She took his pulse,which was 140 beats/minute and then took his blood pressure, whichwas 190/130. Which of the following conditions is (are) consistent withthese observations?a. strokeb. activation of the CNS ischemic responsec. heart attackd. shocke. Both a and b are correct.What is the direct effect (prior to any reflex compensation) of administeringintravenously a selective beta 1 receptor agonist?A)Increased heart rate, stroke volume and total peripheral resistance.B)Increased total peripheral resistance and renin secretion.C)Increased heart rate and stroke volume.D) Increased total peripheral resistance and decreased renin secretion.E) Decreased renin secretion, total peripheral resistance and heart rate.
- some pesticides inhibit acetylcholinesterase, the enzymethat breaks down acetylcholine. explain how these toxinswould affect ePsPs produced by acetylcholine.Compared to most drugs, nicotine isunusual, because at low doses it is mainlya stimulant but at high doses it has moresedative effects. How might these propertiescontribute to nicotine’s addictivepotential?Holly takes night classes at the local community college. Afterher lecture, she walks alone to her car and suddenly hearsseveral dozen screeching birds fly away from the tree she iswalking under. Holly immediately feels her heart poundingand notices that her breathing rate has increased. Minutes later,she still feels tense and “on edge.” What happened internallyto cause Holly’s initial response? Why did Holly still feel tenseminutes later?
- During strenuous exercise, which of the following changes most infuences total peripheral resistance?A) Decreased blood viscosityB) Decreased sympathetic cholinergic activityC) Increased sympathetic adrenergic activity D) Vasodilation in skeletal muscledry mouth is typical side effect of a drug use to teeat sea sick, 1. both para and sympathetic antagnist activity 2.para antagnist 3, somatic antagnist 4,sympathetic antagnisttrue or false.. The articulatory errors present in an apraxic patient’s speech are often the result of damage to CN5 and/or CN7.