In a Classic (Or Early) Experiment to Determine How Large

question 21

Multiple Choice

In a classic (or early) experiment to determine how large the forces are that allow leaves to pull water from the soil, the rate at which water flowed from a reservoir into the cut tip of an actively transpiring plant was _____ the flow rate through the branch tip when it was subsequently attached to a vacuum pump.

• A)greater than
• B)less than
• C)equal to

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Definitions:

Phrenic Nerve

A nerve that originates in the neck and passes down between the lung and heart to reach the diaphragm, crucial for breathing as it controls the diaphragm's movements.

Rectus Abdominus

A long muscle running from the pubis to the ribcage, involved in flexing the lumbar spine and stabilizing the pelvis and core.

Pectoralis Minor

A thin, triangular muscle located beneath the pectoralis major, involved in movements of the shoulder blade, including drawing it downward and forward.

Internal Intercostal

Muscles located between the ribs that contract during exhalation, aiding in the forced expiration of air from the lungs.