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.
It should be (B) Since from the rest its the only that best adds up
Answer: Personality
Explanation: Hereditary factors play a fundamental role in the development of the personality, but so do the parenting style and the way the child grew up.
When the child is growing its personality develops according to what it sees in its environment. It will learn what is good and bad according to the things sees at home, it will define its self-esteem according to how his parents have managed his upbringing, so it is essential to be careful with the type of words that are used when the child is growing up that these can be decisive for the personality.
D) An uncontrollable urge to sleep is not an early sign of hypothermia
Answer:
It is placed in the thoracic cavity.
Explanation:
It is suspended within a tough fibrous sac , the pericardium, by its connections to the great vessels: the superior and inferior venae cavae, the pulmonary artery and veins, and the aorta. It makes sense for it to be placed there because it is so close to the repository system that they work together.
