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iren2701 [21]
3 years ago
11

Which of the following describes a positron emission tomography (PET) scanner? 1: A device that uses magnetic fields to produce

images of brain structures 2: A device that uses magnetic fields to measure blood flow 3: A device that uses radioactive fluid to determine the active areas of the brain 4: An X-ray device that can create a 3D model of the brain
Biology
1 answer:
Delvig [45]3 years ago
7 0

Answer:

3: A device that uses radioactive fluid to determine the active areas of the brain

Explanation:

A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.

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WILL MARK BRAINLIST IF MAKES SENSE
bija089 [108]

Answer:

Latitude provides the location of a place north or south of the equator and is expressed by angular measurements ranging from 0° at the equator to 90° at the poles. Different latitudes on Earth receive different amounts of sunlight, and are a key factor in determining a region’s climate. For example, the higher the latitude of a given place (the farther away it is from the equator), the sharper the angle of the sun’s rays that reach it, meaning that the rays of the sun are spread across a broader area. Therefore, higher latitudes receive less heat than lower latitude areas nearer the equator.

6 0
3 years ago
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What is the role of hemoglobin in the body
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Hemoglobin is found in the red blood cells and are responsible for binding onto oxygen molecules. By binding to the oxygen, it can transport it to through out the body where it is needed.
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3 years ago
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Which of the following statements about cardiac muscle is true? a. Cardiac muscle is like smooth muscle, because smooth muscle h
Aleonysh [2.5K]

Answer:

c. Cardiac muscle contains bands like skeletal muscle, but its contractions are involuntary like smooth muscle.

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Cardiac muscle is also referred to as myocardium and it's one of the three (3) muscles found only in the heart of vertebrates, the other two (2) being smooth muscle tissue and skeletal muscle tissue.

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8 0
3 years ago
The cilia lining the upper respiratory passages (superior to the larynx) beat inferiorly, whereas as the cilia lining the lower
Anton [14]

Answer:

The cilia in the upper respiratory tract move mucus  down toward the pharynx whereas the cilia in the  lower respiratory tract move them up toward the pharynx.

Explanation:

Through the internal nares, the air enters nasopharynx from the nasal cavity. This air has dust-laden mucus. The nasopharynx is lined with ciliated pseudostratified columnar epithelium. These cilia move the mucus down toward the most inferior part of the pharynx. The lining of the larynx inferior to the vocal folds is made up of ciliated pseudostratified columnar epithelium and have ciliated columnar cells, goblet cells, and basal cells.

The goblet cells serve to produce and secrete mucus. The mucus from goblet cells helps trap dust that was not removed in the upper passages. Therefore, the cilia in the upper respiratory tract move mucus and trapped particles down toward the pharynx whereas the cilia in the lower respiratory tract move them up toward the pharynx.

7 0
3 years ago
If a portion of a DNA strand has the base sequence ACGACG, what will be the base sequence of the mRNA strand transcribed? A) TCG
choli [55]
Its D) UGCUGC because this sequence is the mrna if it was the dna sequence it'd be B but its definetly D
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