Answer:
0N
Explanation:
If an object is on one of these imaginary frictionless surfaces, the surface does not present any opposing force (frictional force) to slow an object sliding over it. Therefore no force is needed to keep the object moving.
It would be D because it it based off of knowledge and you are proposing a hypothesis before conducting an experiment to predict what will happen
D... i took science last year
Answer:
I haven't really learned about cell types but I did find this information
Explanation:
How can epinephrine have different effects on different cells? Different cells have different receptors that bind epinephrine. Different cells activate different enzymes as a result of epinephrine binding.
epinephrine induces increased vascular smooth muscle contraction, pupillary dilator muscle contraction, and intestinal sphincter muscle contraction. Other significant effects include increased heart rate, myocardial contractility, and renin release
Hope it at least helps a little :)
