William Herschel... brainly would be great ;)
Nuclear medicine is non-invasive.
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.
In my opinion, they build pleasant expectations bout alcohol by always showing people having a good time by consuming it. You never see an alcohol commercial where the people are not enjoying themselves.
This can affect younger people because when they see on TV that it does no harm to the adults, they think it won't do anything to them. They are going to want to try it, because all they see is people having a good time while drinking.
Hope this helps!
