Mostly because of a difference in concentration between the intra- and extracellular space. Because of this, diffusion through a membrane occurs.
By diffusion of the nutrients through the cell walls and membranes.
The cell membrane exists around the cell, keeping the contents inside and regulating the flow of nutrients and water to and from the cell
directly through their cell membranes
doesnt
Cell membranes do not make nutrients for cells. They are primarily responsible for controlling the entry and exit of substances into and out of the cell, as well as maintaining the cell's internal environment. Nutrients are typically obtained from the external environment through processes such as diffusion or active transport.
nutrients flow in two directions , and energy recycles. By: val <3
False. The mothers blood flows through the placenta in vessels next to the foetal blood that flows in separate vessels. Oxygen and nutrients can flow from the mothers blood into the foetus' blood and carbon dioxide and waste products can flow from the foetus' blood to the mother's blood through the vessel membranes, however the two bloods will never actually mix.
nutrients flow in two directions , and energy recycles. By: val <3
Multicellular organisms exchange materials through mechanisms such as diffusion, active transport, and bulk flow. These processes occur through specialized structures like cell membranes, blood vessels, and respiratory or digestive systems, enabling the transport of gases, nutrients, and wastes throughout the organism's body.
They're classified as semi permeable because it only allows certain enzymes and nutrients, etc, to get through.
Cell membranes are made up of a double layer of lipids with proteins embedded in them. These proteins act as channels and pumps that control the movement of substances in and out of the cell. The membrane is selectively permeable, allowing some substances to pass through while blocking others. This helps maintain the cell's internal environment and regulate the flow of nutrients and waste products.
Mass flow in plants involves the movement of water, minerals, and nutrients through the plant's vascular system. Water and minerals are absorbed by the roots and transported upward through the xylem vessels. Nutrients produced in the leaves through photosynthesis are carried downwards through the phloem vessels. This mass flow is driven by a combination of transpiration, root pressure, and active transport processes.