Question

Как изменится поведение амёбы , если в каплю с животными поместить кристаллик соли? Как называется это состояние?

Answer 1

 Если внести в капельку воды кристаллик поваренной соли, амеба перестает двигаться, втягивает ложноножки и приобретает шарообразную форму. Таким образом, амебы уменьшают поверхность тела, на которую действует вредный для них раствор соли. Значит, амебы Эта способность называется раздражимостью. Она связывает амебу с внешней средой и имеет защитное значение. способны отвечать на внешние раздражения. 

Answer 2

Behavior of Amoeba in the Presence of Salt Crystals

When a salt crystal is placed in a drop of water containing amoebas, the behavior of the amoebas can be affected. This phenomenon is known as osmosis. Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Amoebas are single-celled organisms that live in water environments. They have a flexible cell membrane that allows them to change shape and move. Amoebas obtain nutrients by engulfing food particles through a process called phagocytosis. They also regulate the water content inside their cells to maintain their internal environment.

When a salt crystal is introduced into the water, it dissolves and releases ions into the surrounding solution. These ions increase the solute concentration in the water. As a result, the water potential outside the amoeba decreases, creating a concentration gradient. Water molecules tend to move from an area of higher water potential (lower solute concentration) to an area of lower water potential (higher solute concentration) through the cell membrane of the amoeba.

Effects on Amoeba Behavior

The behavior of amoebas in the presence of salt crystals can vary depending on the concentration of the salt solution. Here are two possible scenarios:

1. Hypertonic Solution: If the concentration of the salt solution is higher outside the amoeba than inside, the solution is hypertonic. In this case, water molecules will move out of the amoeba through osmosis, causing the amoeba to shrink and become dehydrated. The amoeba may exhibit a slower movement and reduced phagocytosis activity as it tries to conserve water.

2. Hypotonic Solution: If the concentration of the salt solution is lower outside the amoeba than inside, the solution is hypotonic. In this case, water molecules will move into the amoeba through osmosis, causing the amoeba to swell and potentially burst. The increased water content may lead to increased movement and phagocytosis activity as the amoeba tries to maintain its internal balance.

It's important to note that the specific behavior of amoebas in response to salt crystals may vary depending on the species of amoeba and the concentration of the salt solution. Additionally, other factors such as temperature and the presence of other substances in the water can also influence the behavior of amoebas.

Conclusion

When a salt crystal is introduced into a drop of water containing amoebas, the behavior of the amoebas can be affected due to osmosis. The concentration gradient created by the dissolved ions in the salt solution can cause water molecules to move into or out of the amoebas, leading to changes in their size, movement, and phagocytosis activity. The specific behavior of amoebas in response to salt crystals depends on the concentration of the salt solution and other environmental factors.