What Drives the Return of Blood to the Heart in the Systemic

question 51

Multiple Choice

What drives the return of blood to the heart in the systemic veins?

• A) Muscles squeezing blood through the veins
• B) The lymphatic system
• C) Contractions of the left auricle
• D) Ciliated cells lining the inside of the veins

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Definitions:

Difference Threshold

The smallest amount by which a stimulus must be changed in order to produce a noticeable variation in sensory experience.

Minimum Transduction

The least amount of energy needed for a sensory system to detect a stimulus.

The Pupil

The opening in the center of the iris of the eye, through which light enters to reach the retina.

Aperture

In optics, the opening through which light travels in devices such as cameras and microscopes, controlling the amount of light that enters.