ANATOMY+PHYSIOLOGY
ANATOMY+PHYSIOLOGY
13th Edition
ISBN: 2810017675928
Author: OpenStax
Publisher: OpenStax
bartleby

Videos

Textbook Question
Book Icon
Chapter 12, Problem 1ILQ

In 2003, the Nobel Prize in Physiology or Medicine was awarded to Paul C. Lauterbur and Sir Peter Mansfield for discoveries related to magnetic resonance imaging (MRI). This is a tool to see the structures of the body (not just the nervous system) that depends on magnetic fields associated with certain atomic nuclei. The utility of this technique in the nervous system is that fat tissue and water appear as different shades between black and white. Because white matter is fatty (from myelin) and gray matter is not, they can be easily distinguished in MRI images. Visit the Nobel Prize website (http://openstaxcollege.org/l/nobel_2) to play an interactive game that demonstrates the use of this technology and compares it with other types of imaging technologies. Also, the results from an MRI session are compared with images obtained from x-ray or computed tomography. How do the imaging techniques shown in this game indicate the separation of white and gray matter compared with the freshly dissected tissue shown earlier?

Expert Solution & Answer
Check Mark
Summary Introduction

To write:

Comparison and separation of the white and gray matter in MRI.

Introduction:

Magnetic resonance imaging (MRI) is a medical imaging technique which produces detailed images of the body parts using strong magnetic fields and radio waves.

Explanation of Solution

MRI uses the magnetic properties of the certain atomic nucleus. A major component of the human body is the water molecule which is made up of hydrogen and oxygen atoms. Proton present in every hydrogen atom is like the tiny magnets that are sensitive to magnetic fields. They align themselves in the direction of the magnetic field which is deviated by sending the radio waves and realign once the radio waves are turned off. These signals provide information about the exact location of the protons in the body. They also help to distinguish between the various types of tissues like the gray matter and the white matter in the brain by the relative amount of water present. The gray matter appears dark gray and the white matter appears lighter gray, water appears dark, fats appear bright.

Conclusion

Thus, MRI is a technique used in the examination of the central nervous system and the other parts of the body indicating disorders if any.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
a)The distribution of sodium ions across the cell membrane of a neuron is 20 mmol/L inside the cell and 200 mmol/L outside the cell. When the system reaches equilibrium, the concentration of sodium ions will be identical on both sides of the cell membrane. What is the standard Gibbs energy difference in the system? Assume the system is at body temperature (37 °C). b)What is the Gibbs energy difference across the membrane in the initial state (prior to reaching equilibrium)?
Sodium is an incredibly important substance in our body. You may remember from module one that sodium ions play a crucial role in conducting nerve impulses during depolarization. You may also remember from biology 20 that sodium is involved in muscle contractions. Hyponatraemia has a condition where there is too little sodium in the body. This can result on difficulty processing thoughts nausea decreased ability to balance seizures in coma on the other hand an excessive amount of sodium or hyponatraemia in the body can also lead to many different neurological problems including seizures in coma. Katrina has an excessive amount of sodium ions in her blood plasma. This is occurring despite the fact that she has been watching her salt intake and ensuring that she's drinking enough fluid throughout the day. Katrina has an aldosterone imbalance. What does Catrinas hormone feedback loop look like? When constructing a feedback loop, clearly label the structures or glands involved in the…
compare small molecule neurotransmitters to neuropeptides Select one: a. neuropeptides are synthesized as large peptide molecules that are cleaved to form smaller peptides; neurotransmitters are modified amino acids     b. neuropeptides bind to metabotropic receptors; neurotransmitters bind to ionotropic or metabotropic receptors   c. neuropeptides are slower to replenish in the axon terminal  than neurotransmitters   d. all of these are valid comparisons   e. neuropeptides are released by cells that express the peptide gene; neurotransmitters are released by cells that express the synthetic enzymes required to convert amino acid precursors

Chapter 12 Solutions

ANATOMY+PHYSIOLOGY

Ch. 12 - Which part of a neuron transmits an electrical...Ch. 12 - Which term describes a bundle of axons in the...Ch. 12 - Which functional division of the nervous system...Ch. 12 - What type of glial cell provides myelin for the...Ch. 12 - Which part of a neuron contains the nucleus?...Ch. 12 - Which of the following substances is least able to...Ch. 12 - What type of glial cell is the resident macrophage...Ch. 12 - What two types of macromolecules are the main...Ch. 12 - If a thermoreceptor is sensitive to temperature...Ch. 12 - Which of these locations is where the greatest...Ch. 12 - How long does all the signaling through the...Ch. 12 - What is the target of an upper motor neuron?...Ch. 12 - What ion enters a neuron causing depolarization of...Ch. 12 - Voltage-gated Na+ channels open upon leaching what...Ch. 12 - What does a ligand-gated channel require in order...Ch. 12 - What does a mechanically gated channel respond to?...Ch. 12 - Which of the following voltages would most likely...Ch. 12 - Which of the following is probably going to...Ch. 12 - How much of a change in the membrane potential is...Ch. 12 - A channel opens on a postsynaptic membrane that...Ch. 12 - What neurotransmitter is released at the...Ch. 12 - What type of receptor requires an effector protein...Ch. 12 - Which of the following neurotransmitters is...Ch. 12 - What responses are generated by the nervous system...Ch. 12 - When eating food, what anatomical and functional...Ch. 12 - Multiple sclerosis is a demyelinating disease...Ch. 12 - Which type of neuron, based on its shape, is best...Ch. 12 - Sensory fibers, or pathways, are referred to as...Ch. 12 - If a person has a motor disorder and cannot move...Ch. 12 - What does it mean for an action potential to be an...Ch. 12 - The conscious perception of pain is often delayed...Ch. 12 - If a postsynaptic cell has synapses from five...Ch. 12 - Why is the receptor the important element...
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
  • Text book image
    Anatomy & Physiology
    Biology
    ISBN:9781938168130
    Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
    Publisher:OpenStax College
Text book image
Anatomy & Physiology
Biology
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:OpenStax College
Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license