G 11 ch. 2 (transportation)

The transport of sugars around the plant can go in more than one direction. What term is given to this process?

• Polydirectional

• Didirectional

• Tridirectional

• Bidirectional

The graph provided shows the relationship between the time of day and the rate of water flow through a plant. Between which hours was the rate of transpiration the greatest?

• 2 am and 6 pm

• 8 pm and 10 pm

• 12 pm and 6 pm

• 2 am and 8 am

The cohesion–tension, or cohesion–adhesion, theory of water movement aims to explain how water is transported through the xylem. Which of the following best explains what is meant by adhesion in water movement?

• Adhesion refers to the forces of attraction between the molecules of water inside the xylem.

• Adhesion refers to the movement of water from the soil into the root, from an area of low solute concentration to an area of high solute concentration.

• Adhesion refers to the forces of attraction that occur between the water molecules and the walls of the xylem.

• Adhesion refers to the pull of water through the xylem, as water vapor diffuses from the stomata.

What are the two major pathways of blood circulation through the human body?

• Pulmonary and systemic circulations

• Pulmonary and arterial circulations

• Hepatic and renal circulations

• Systemic and venous circulations

Which organs are involved in the hepatic portal circulation pathway?

• The liver and the organs of the digestive system

• The heart and the small intestine

• The kidneys and the heart

• The lungs and the stomach

Which of the following best defines the term heart rate (bpm)?

• The number of times the heart stops per minute

• The number of times the heart beats per minute

• The volume of blood the heart releases per minute

• The number of times the heart beats per hour

From what chamber does the oxygenated blood leave the heart to be transported around the body?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

Through what chamber does the oxygenated blood from the lungs enter the heart?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

Why do arteries have thick, muscular walls containing elastic fibers?

• To help them carry blood at high pressure

• To help them carry blood at low pressure

• To prevent the backflow of blood

• To prevent oxygen from being lost from the blood

Why is it important for capillaries to have thin, permeable walls?

• To allow them to carry blood at a high pressure

• To provide capillaries with the flexibility to move around cell

• To allow substances to diffuse into and out of cells

• To increase the rate of blood flow