What is mass or bulk flow?

What is mass or bulk flow?

Mass flow or bulk flow is the movement of substances in bulk or in masses down a pressure gradient (in plants a pressure gradient is seen due to differences in solute concentration) or temperature gradient. E.g: blood circulation and the transport of water in vascular plants.

What is bulk flow of water?

bulk flow: overall movement of water in response to differences in the potential energy of water. water potential: difference in water energy between two regions containing water.

What is bulk flow in the body?

Bulk flow is a process used by small lipid-insoluble proteins to cross the capillary wall. When moving from the blood to the interstitium, bulk flow is termed filtration. When moving from the interstitium to the blood, bulk flow is termed re-absorption.

What is bulk flow in blood?

Bulk flow is the movement of blood from a region of high pressure to a region of low pressure (P2 – P1). In the systemic circulation the highest pressure is in the aorta. The pressure in the aorta oscillates from the systolic pressure, usually 120 mmHg, to the diastolic pressure, usually 80 mm Hg.

What is bulk flow in respiration?

When gases move from an area of high pressure to an area of low pressure, this is known as ‘bulk flow’. During a breathing cycle, air moves in and out of the lungs by bulk flow. The respiratory muscles are responsible for the changes in the shape and volume of the chest cavity that cause the air movements in breathing.

What is the difference between bulk flow and diffusion?

“Bulk flow” is the movement/flow of an entire body due to a pressure gradient (for example, water coming out of a tap). “Diffusion” is the gradual movement/dispersion of concentration within a body, due to a concentration gradient, with no net movement of matter.

What is bulk flow in a plant?

In general, bulk flow in plant biology typically refers to the movement of water from the soil up through the plant to the leaf tissue through xylem, but can also be applied to the transport of larger solutes (e.g. sucrose) through the phloem.

What is bulk flow in transpiration?

Transpiration of water from a leaf dries the surrounding tissue and makes its water potential more negative. Water, therefore, moves from a region or cell of lower solute concentration (higher water concentration) to a region or cell of higher solute concentration (lower water concentration). …

What are examples of bulk flow?

Hint:Circulation of blood, water transport in xylem vessels and plant phloem tubes are the examples of mass or bulk flow systems.

How does bulk flow differ from diffusion?

The key difference between bulk flow and diffusion is that bulk flow is the movement of a fluid or a mass due to a pressure gradient while diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration along the concentration gradient.

What is bulk flow diffusion?

Bulk flow and diffusion are two methods by which molecules move from one place to another place. Bulk flow refers to the movement of a fluid driven by a pressure gradient. Diffusion is the movement of molecules down the concentration gradient. Both processes take place during human breathing.

What is the purpose of bulk flow in respiration?

The bulk flow in respiration is mainly defined as the movement of gases (oxygen and carbon dioxide) from an area of high pressure to an area of low pressure. This mechanism in breathing is mainly responsible for the changes in the shape and volume of the chest cavity, which is controlled by the respiratory muscles.