Answer:
D and A
Explanation:
Fever is not a symptom of cardiomyopathy because fever is usually associated with a infection and cardiomyopathy is not. The usual symptoms of cardiomyopathy are: Breathlessness, swelling of members, bloating of the abdomen, fatigue, uneven heartbeats and dizziness.
Physical activity prevents cardiovascular diseases. All the other alternatives are risks factors for a cardiovascular condition. Obesity can cause obstruction of blood vessel, diabetes causes circulation system problems and tobacco use damages tissues and blood vessels.
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.
The first and last one are correct
