Concept explainers
Which of these parts of the embryonic brain is correctly matched with the structure it becomes in the adult brain?
- Mesencephalon —midbrain
- metencephalon—medulla oblongata
- myelencephalon—cerebrum
- telencephalon— pons and cerebellum
Introduction:
The brain is divided into three parts, each of which performs a complex set of functions. The three parts of the brain are forebrain, midbrain, and hindbrain. The brain has three visual portions that are cerebrum, cerebellum and medulla oblongata.
Answer to Problem 1RAC
The correct answer is option (a) mesencephalon-midbrain.
Explanation of Solution
Explanation/justification for the correct answer:
Option (a) mesencephalon-midbrain. The midbrain is formed by the mesencephalon. The midbrain connects the forebrain to the hindbrain. The mesencephalon forms the future or adult midbrain along with adult tectum, pretectum, cerebral aqueduct, and cerebral peduncle. So, the correct answer is option (a).
Explanation for incorrect answer:
Option (b) metencephalon-medulla oblongata. The metencephalon is the part of the embryonic brain that forms the hindbrain. This hindbrain then differentiates into pons and cerebellum. So, this is an incorrect option.
Option (c) myelencephalon-cerebrum. The myelencephalon forms the posterior part of the hindbrain in adults. The posterior portion forms medulla oblongata. So, this is an incorrect answer.
Option (d) telencephalon-pons and cerebellum. Telencephalon forms the cerebrum that forms that major part of the brain and subcortical structures and pathways. So, this is an incorrect answer.
The mesencephalon forms the adult midbrain that functions to connect the midbrain with the hindbrain and forms other structures like tectum, and pretectum. Hence, the correct answer is option (a) mesencephalon-midbrain.
Want to see more full solutions like this?
Chapter 13 Solutions
Seeley's Anatomy & Physiology
- Watch this animation (http://openstaxcollege.org/l/braindevel) to examine the development of the brain, starting with the neural tube. As the anterior end of the neural tube develops, it enlarges into the primary vesicles that establish the forebrain, midbrain, and hindbrain. Those structures continue to develop throughout the rest of embryonic development and into adolescence. They are the basis of the structure of the fully developed adult brain. How would you describe the difference in the relative sizes of the three regions of the brain when comparing the early (25th embryonic day) brain and the adult brain?arrow_forwardOutline the components of the brain from the least specialized, oldest evolutionary level to the newest, most specialized level.arrow_forwardWatch the video (http://openstaxcollege.org/l/2brains) titled The Man With Two Brains to see the neuroscientist Michael Gazzaniga introduce a patient he has worked with for years who has had his corpus callosum cut, separating his two cerebral hemispheres. A few tests are run to demonstrate how this manifests in tests of cerebral function. Unlike normal people, this patient can perform two independent tasks at the same time because the lines of communication between the right and left sides of his brain have been removed. Whereas a person with an intact corpus callosum cannot overcome the dominance of one hemisphere over the other, this patient can. If the left cerebral hemisphere is dominant in the majority of people, why would right-handedness be most common?arrow_forward
- Watch this video (http://openstaxcollege.org/l/neuroexam) that provides a demonstration of the neurological exam—a series of tests that can be performed rapidly when a patient is initially brought into an emergency department. The exam can be repeated on a regular basis to keep a record of how and if neurological function changes over time. In what order were the sections of the neurological exam tested in this video, and which section seemed to be left out?arrow_forwardwhat part is this of the superior view of the brain?arrow_forwardWhich brain cell is an interneuron? Renshaw cell Pyramidal cell Granular cell Purkinje cellarrow_forward
- What connects the brain with the peripheral nervous system? The spinal cord The autonomic nervous system The reticular formation The brainstemarrow_forwardwhat part is this of the Midsagittal Section of the Brain?arrow_forwardThe largest and the most complex part of our brain is the cerebellum thalamus hypothalamus cerebrum mid brainarrow_forward
- Which of the following are the four segments of the brain stem? - right hemisphere, left hemisphere, motor area, and sensory area - cerebrum, cerebellum, midbrain, and cranial nerve - frontal, parietal, occipital, and temporal - medulla oblongata, pons, hypothalamus, and thalamusarrow_forwardThe brain consists of the cerebrum, diencephalon, midbrain, pons,medulla oblongata, and cerebellum. True or false?arrow_forwardWhich of the following statements is true about the cerebellum It regulates bodily function such as eating/drinking/and bodily temperature It contributes to vital functions such s breathing and heart rate it integrates information about motor commands with sensory feedback it relays sensory information between all sensory organs and the cortexarrow_forward
- Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax CollegeHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning