Answer:
Summary of Excretion so yea :()
Answer:
1. No, cows don't get energy from sunlight.
2. 2 living parts are flowers and trees and 2 non-living parts are fences & houses
3. No, flies don't develop from garbage.
4. The populations in that living space will decline, because there won't be enough space.
5. A polar bear lives in a cold,arctic habitat.
6. A niche is the match of a species to a specific environmental condition.
Explanation:
No, thy substance tis’ no mineral
Answer:
The correct order of events is:
C) Nicotine binds to the transmembrane protein that normally binds the neurotransmitter acetylcholine.
A) The acetylcholine receptor is an ion channel, and when a ligand binds, the ion channel opens.
B) An influx of ions carries the signal to the reward areas of the brain.
D) The signal causes release of dopamine in the brain, which causes good feelings.
E) Nicotine is quickly eliminated from the body (causing cravings for more cigarettes to produce good feelings).
Explanation:
Nicotine acts on acetyl cholinergic receptors that are located in membranes of the midbrain neurons. Nicotine can activate those receptors or block them more efficiently than acetylcholine. Stimulation of nicotinic receptors leads to an increase in ions flow that reaches the brain and causes dopamine release in the nucleus accumbens through axonal prolongations of the dopaminergic pathway. This response is responsible for the smoker´s recompense sensation.
The dopaminergic pathway is the most important way in the process of nicotine dependence and addiction to the drug.
Poaching is the act of illegally killing an animal. The very prominent subject of poaching is the rhino, some species of which are now virtually extinct due to extensive illegal hunting. However, many other animals are also poached. For example, elephants are poached for the ivory in their tusks. Tigers are poached as trophy animals or for traditional medicine. Sea turtles and lemurs also suffer a similar fate for similar reasons.
The poaching of these animals has driven their population into corners, where they face imminent extinction. Although rehabilitation efforts are extensive, it is unlikely that the populations of these animals will recover unless the poachers are stopped first.
