5 circle the correct underlined term the inferior

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5.Circle the correct underlined term. The inferior region of the brain stem,the medulla oblongata / cerebellum houses many vital autonomic centersinvolved in the control of heart rate, respiratory rhythm, and blood pressure.6.Directly under the occipital lobes of the cerebrum is a large cauliflower-likestructure known as the _________.a. brain stemb. cerebellumc. diencephalonE X E R C I S EFor related exercise studytools, go to the Study Area of MasteringA&P.There you will find:uni25CFPractice Anatomy Labuni25CFPhysioExuni25CFA&PFlixuni25CFPractice quizzes, Histology Atlas, eText,
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Chapter 4 / Exercise 10
Human Biology
Starr/McMillan
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17toward the CNS, and themotor portion,which containsnerve fibers that conduct impulses away from the CNS.The motor portion, in turn, consists of thesomatic division(sometimes called thevoluntary system), which controls theskeletal muscles, and theautonomic nervous system (ANS),which controls smooth and cardiac muscles and glands. TheANS is often referred to as theinvoluntary nervous system.Itssympathetic and parasympathetic branches play a major rolein maintaining homeostasis.In this exercise the brain (CNS) and cranial nerves (PNS)will be studied because of their close anatomical relationship.The Human BrainDuring embryonic development of all vertebrates, the CNSfirst makes its appearance as a simple tubelike structure, theneural tube,that extends down the dorsal median plane. Bythe fourth week, the human brain begins to form as an expan-sion of the anterior or rostral end of the neural tube (the endtoward the head). Shortly thereafter, constrictions appear,dividing the developing brain into three major regions—forebrain, midbrain,andhindbrain(Figure 17.1). Theremainder of the neural tube becomes the spinal cord.When viewed alongside all nature’s animals, humansare indeed unique, and the key to their uniquenessis found in the brain. Each of us is a compositereflection of our brain’s experience. If all past sensory inputcould mysteriously and suddenly be “erased,” we would beunable to walk, talk, or communicate in any manner. Sponta-neous movement would occur, as in a fetus, but no voluntaryintegrated function of any type would be possible. Clearly wewould cease to be the same individuals.Because of the complexity of the nervous system, its ana-tomical structures are usually considered in terms of two prin-cipal divisions: the central nervous system and the peripheralnervous system. Thecentral nervous system (CNS)consistsof the brain and spinal cord, which primarily interpret incom-ing sensory information and issue instructions based on thatinformation and on past experience. Theperipheral nervoussystem (PNS)consists of the cranial and spinal nerves, gan-glia, and sensory receptors. These structures serve as com-munication lines as they carry impulses—from the sensoryreceptors to the CNS and from the CNS to the appropriateglands, muscles, or other effector organs.The PNS has two major subdivisions: thesensory por-tion,

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Term
Fall
Professor
PETERS
Tags
Biology, Lateral ventricles, third ventricle
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Human Biology
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Chapter 4 / Exercise 10
Human Biology
Starr/McMillan
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