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lozanna [386]
2 years ago
12

Select the correct answer.

Health
1 answer:
Tpy6a [65]2 years ago
7 0

Answer:

The two types of immunity are OA

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____________ activity really gets your lungs, muscles, and heart working hard. This would include more demanding activities like
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Help fill in blanks please
Neko [114]

Answer:

1. spontaneously

2. resting potential

3. action potentials

4. pacemaker potentials

5. K+

6. Na+

7. into

8. Ca+

Explanation:

Pacemaker cells (also known as sinoatrial node cells) are cells that generate rhythmic impulses and set the pace for blood pumping in the heart. These cells have the ability to rhythmically depolarize and initiate action potentials. In pacemaker cells, Ca2+  and Na+ levels are higher in the extracellular environment, while K+ concentration is higher intracellularly. The pacemaker action potentials have three phases: 1-depolarization, where membrane potential reaches -40 mV and voltage-gated Ca2+ channels open, 2-repolarization, where voltage-gated Ca2+ channels close and voltage-gated K+ channels open, and finally 3-gradual depolarization, which is caused by the slow influx of Na+ ions.

5 0
3 years ago
Dr. mondragon is performing eye surgery on a patient. as dr. mondragon views the retina through the patient's pupil, what type o
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Rob is an EMT treating a patient who's gasping for breathe and appears to have chills Which of the following should Rob do to co
kvasek [131]
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