A Nurse Is Teaching a Nursing Student How Blood Can

question 4

Multiple Choice

A nurse is teaching a nursing student how blood can return to the heart when pressure in the venous capillary beds is very low. Which statement by the student indicates a need for further teaching?

• A) "Constriction of small muscles in the venous wall increases venous pressure."
• B) "Negative pressure in the left atrium draws blood toward the heart."
• C) "Skeletal muscles relax to allow the free flow of blood."
• D) "Venous valves help prevent the backflow of blood."

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Definitions:

Kilocalories

A unit of energy measurement in food, commonly called calories, equal to 1,000 small calories, used to quantify the energy food provides to the body.

Energy Difference

The variation in energy levels between two states, important in physics to describe phenomena such as transitions between quantum states.

Phosphate Bond

A chemical bond between a phosphorus atom and another atom, crucial in the storage and release of energy in living organisms.

ATP Channel Protein

A type of membrane protein that allows ATP molecules to move across cell membranes, often involved in cellular energy management.