Answer:
HOW ARE ORGANIC AND CHEMICAL FERTILIZER DIFFERENT?
The process that helps the body cool off to maintain its temperature is called evaporation.
Answer:
D) the sensory receptors to the CNS.
Explanation:
Sensory division of nervous system is also called as afferent division. It has nerves that come from sensory receptors present in internal organs and somatic areas ( eyes, ears, skin etc. ) and these nerves send impulse to CNS. CNS gets information on what is happening with the body via these impulses. It can detect various senses like touch, hearing, sight etc.
In contrast motor or efferent division of nervous system conducts impulse from CNS to effector body parts which decide how the body responds to a stimulus.
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.
Because they have to grow and harvest their own plants...since they where no market to buy their foods
