Answer:
True.
Explanation:
It can become quite addictive if you get enough of it. (sorry if I'm wrong.)
Answer:
Probably A.
Explanation:
Tanning beds have been known to cause different types of cancer such as Melanoma
Confirming patients appointments is a good practice for the medical office because it help reduces no-shows such as the medical office can make a cancellation appointments. That will waste physicians time and also take valuable appointment slot away from other patient.
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.
