1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Svet_ta [14]
3 years ago
14

Functional Magnetic Resonance Imaging is a tool that has been very useful in identifying what parts of the brain do what. Scient

ists can have a person perform some particular activity and then look for active areas in the brain. How does fMRI work?
A. It takes a picture of the inside of the brain according to electricity levels. The more electrical current in the area, the more active it is.
B. It takes a picture of the inside of the brain according to blood flow. More blood flow indicates more activity in that area.
C. It takes images of thin layers of the brain and the more electrical activity in a layer, the more magnetic it is and this shows up in fMRI.
D. Electrodes attached to the skull can trigger activity in particular brain areas which then trigger a person to perform certain behaviors.
E. It takes a picture of the brain according to oxygen levels. More oxygen in an area indicates more activity in that area.
Biology
1 answer:
Ne4ueva [31]3 years ago
4 0

Answer:

E. It takes a picture of the brain according to oxygen levels. More oxygen in an area indicates more activity in that area.

Explanation:

Haemoglobin is diamagnetic when oxygenated but paramagnetic when deoxygenated. This distinction in magnetic characteristics leads to tiny variations in the blood MR signal. Since blood oxygenation differs, these variations can be used to identify brain activity depending on the concentrations of neural activity.

You might be interested in
Which sentence best explains how a unicellular organism gets nutrients? Explain why.
solong [7]
B because it takes in nutrients through endocytosis so the membrane opens up and envelopes the nutrients
8 0
3 years ago
A species with narrow niches that can survive in a small range of environmental conditions are
Ugo [173]

Answer:

D. Specialist Species

<h2>What is the advantage for species to be specialists, and how can they survive in the presence of opportunistic/generalist species?</h2>

In the setting of specialized habitats or unique situations, specialized species exist. When those conditions and surroundings change, they must adapt or go extinct, thus they must survive while they still exist.

When compared to generalists, they have the benefit of efficiency, which increases the likelihood of survival and, hence, reproduction within certain settings or situations. The generalists, on the other hand, have the benefit of being able to survive in a larger variety of circumstances and have a higher probability of doing so.

Cactuses, which are plants adapted to dry environments, are an example of specialization. More generalist plant species would typically outcompete cacti in most habitats on Earth, but very few of such species could endure the harsh conditions of a desert.

Extreme environmental conditions, competition for limited resources, and "evolutionary arms races" are some of the pressures that cause specialization. Cheetahs sprint quickly both because their prey moves quickly and because quicker cheetahs will be more effective hunters and more likely to procreate. The advantage of specialization is clear when seen from the standpoint of catching the next meal on a daily basis.

My key argument is that specialization's benefits must always be viewed in the context of the environment that generated the selective pressure that resulted in specialization. Although experts are specialists because they must be, their specializations put them in danger.

4 0
2 years ago
The earths core is made up mainly of what 2 substances?
OLga [1]

The two substances are rock (molten and solid) and metal (solid + liquid).

Layers of the earth from the outside in:

1. crust. hard rock/dirt/ground. Shell

2. mantle. melted rock and stuff. Egg white

3. core. Outer core - liquid. Inner core- solid. Nickle and iron. Yolk

3 0
3 years ago
which of the following is true of reproduction? A.only small organisms have a high chance to reproduce B.only large organisms ha
alexira [117]

Answer:

D

Explanation:

7 0
3 years ago
Read 2 more answers
A cross section of a flower is shown below:
Marina86 [1]

The anther and filament, the anther produces pollen. They are the parts of the male reproductive organ in a flower.

<h3>What are the male parts of the flowers?</h3>

The flower can be considered as the reproductive structure of flowering plants.

The anther and filaments represent the male structures of a flower, which may also contain female structures.

The stamen can be considered as the male reproductive organ because this structure is responsible for producing pollen which contains germinal cells in a flower.

Learn more about flower parts here:

brainly.com/question/3197281

5 0
2 years ago
Other questions:
  • During interphase, the DNA in the nucleus of the cell is thin and threadlike and called _____.
    15·2 answers
  • Please Help (:
    15·1 answer
  • Which organism needs care from its parents after birth? A. frog B. turtle C. mouse D. snake
    8·1 answer
  • How did Pasteur’s experiment with tech flasks help disprove the idea that living things could just appear or come from non livin
    11·1 answer
  • It is said that corporations have perpetual life. <br> a. True <br> b. False
    12·1 answer
  • Similarities between the DNA of certain bacteria and the DNA of both mitochondria and chloroplasts is evidence that these organe
    14·1 answer
  • Directional selection acting upon a beneficial recessive allele will take longer to push this allele to fixation than for a bene
    7·1 answer
  • Which of these is a possible disadvantage of using wind as a source of
    7·1 answer
  • What is comparative anatomy and how do scientists use it to study evolution?
    5·2 answers
  • . What dam that is still under construction will replace the current tallest dam?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!