Too much and the plant will not be able to access oxygen ; too little and the plant will lose the ability to transport nutrients, which are typically moved into the roots while in solution.

In addition, ion channels are key components in a wide variety of biological processes that involve rapid changes in cells, such as cardiac, skeletal, and smooth muscle contraction, epithelial transport of nutrients and ions, T-cell activation and pancreatic beta-cell insulin release.

Blood vessels in the velvet transport nutrients to support antler growth.

Gametes can be identical in form and function ( known as isogametes ), but in many cases an asymmetry has evolved such that two sex-specific types of gametes ( heterogametes ) exist: male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism.

Transport of protons from the cytosol to the vacuole stabilizes cytoplasmic pH, while making the vacuolar interior more acidic creating a proton motive force which the cell can use to transport nutrients into or out of the vacuole.

Its basic function is to transport water, but it also transports some nutrients through the plant.

These roots have some ability to absorb water and nutrients, but their main function is transport and to provide a structure to connect the smaller diameter, fine roots to the rest of the plant.

Consequently every cell is able to obtain nutrients, water and oxygen without the need of a transport system.

The haustorium contains amino acid and hexose sugar transporters and H < sup >+</ sup >- ATPases which are used for active transport of nutrients from the plant nourishing the fungus.

The transport of actively and passively absorbed nutrients across epithelium is affected by the unstirred water layer covering the microvillus membrane.

These transport fluid and nutrients internally.

# Absorption: of nutrients from the digestive system to the circulatory and lymphatic capillaries through osmosis, active transport, and diffusion, and

Export of sodium from the cell provides the driving force for several secondary active transporters membrane transport proteins, which import glucose, amino acids, and other nutrients into the cell by use of the sodium gradient.

The hemolymph of lower arthropods, including most insects, is not used for oxygen transport because these animals respirate directly from their body surfaces ( internal and external ) to air, but it does contain nutrients such as proteins and sugars.

Root pressure can transport water and dissolved mineral nutrients from roots through the xylem to the tops of relatively short plants when transpiration is low or zero.

Transpiration allows plants to transport water and mineral nutrients from the soil to growth regions, and also cools the plant.

The function of the heart is to transport blood to deliver oxygen, nutrients and chemicals to the cells of the body to ensure their survival and proper function and to remove the cellular wastes.

The circulatory system functions to transport the blood to deliver O < sub > 2 </ sub >, nutrients and chemicals to the cells of the body to ensure their health and proper function, and to remove the cellular waste products.

In botany, plants with a dedicated transport system for water and nutrients are called vascular plants.

Thus, protective cells termed astrocytes surround the capillaries in the brain and absorb nutrients from the blood and subsequently transport them to the neurons, effectively isolating the brain from a number of potential chemical insults.

This is the chemical portion of the red blood cell that aids in the transport of oxygen and nutrients around the body, but, this time, it is carbon dioxide that is transported back to the lung.

T. vaginalis obtains nutrients by transport through the cell membrane and by phagocytosis.

Limitations of large-molecule antibacterials include reduced transport across membranes and within the human body.

At the same time, Americans would buy US cars, transport them across the border, then sell them in Canada.

The late 4th century writer on Roman military affairs Vegetius mentions soldiers using reed rafts, drawn by leather leads, to transport equipment across rivers.

Particles that are required for cellular function but are unable to diffuse freely across a membrane enter through a membrane transport protein or are taken in by means of endocytosis.

Large quantities of beef were available across the British Dominions and South America, but its transport and storage were problematic.

ATP is consumed to drive cellular processes that require energy ( such as synthesis of macromolecules, active transport of molecules across the membrane, and assembly of flagella ).

* Transport hub, where traffic is exchanged across several modes of transport

Carthage at the time was in such a poor state that its navy was unable to transport his army to Iberia ( Hispania ); instead, Hamilcar had to march it towards the Pillars of Hercules and transport it across the Strait of Gibraltar ( present-day Morocco / Spain ).

Roads and quays were built ; the slate industry became a significant employer on Easdale and surrounding islands ; and the construction of the Crinan and Caledonian canals and other engineering works such as Telford's " Bridge across the Atlantic " improved transport and access.

All living cells require a continual supply of energy for two main purposes: for the biosynthesis of micro and macromolecules, and for the active transport of ions and molecules across cell membranes.

While the first use of a roundel in a London transport context was the 19th-century symbol of the London General Omnibus Company – a wheel with a bar across the centre bearing the word GENERAL – its use on the Underground stems from the decision in 1908 to find a more obvious way of highlighting station names on platforms.

Polyprenols and their phosphorylated derivatives also play important transport roles, in this case the transport of oligosaccharides across membranes.

In addition, there is a membrane potential across the inner membrane, formed by the action of the enzymes of the electron transport chain.

This allows one to create end-to-end circuits across any type of transport medium, using any protocol.

Elevated tyramine competes with tyrosine for transport across the blood – brain barrier ( via aromatic amino acid transport ) where it can then enter adrenergic nerve terminals.

These include ion channels that permit electrically charged ions to flow across the membrane, and ion pumps that actively transport ions from one side of the membrane to the other.

Road transport is the major form of travel across the huge distances between Nigerien population centers, though most Nigeriens do not own vehicles.

Road transport is the major form of travel across the huge distances between Nigerien population centers, though most Nigeriens do not own vehicles.

Nuclear pore complexes allow the transport of water-soluble molecules across the nuclear envelope.

The energy released by electrons flowing through this electron transport chain is used to transport protons across the inner mitochondrial membrane, in a process called chemiosmosis.

Both the electron transport chain and the ATP synthase are embedded in a membrane, and energy is transferred from electron transport chain to the ATP synthase by movements of protons across this membrane, in a process called chemiosmosis.