Which of the Following Statements About Plant Hormones Is False

question 37

Multiple Choice

Which of the following statements about plant hormones is false ?

• A) They are organic compounds that act as highly specific chemical signals.
• B) They are effective at extremely low concentrations.
• C) They elicit many different responses.
• D) They may stimulate a response at one concentration and inhibit that same response at a different concentration.
• E) They can currently be categorized into seven major classes.

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Definitions:

Precapillary Sphincter

A band of smooth muscle that adjusts blood flow into capillaries mainly by contracting and relaxing, thereby regulating the passage of blood into tissues.

Lactate Production

Lactate production occurs during anaerobic respiration in muscles, where glucose is converted to lactate in the absence of sufficient oxygen, leading to muscle fatigue.

Venous Tone

The degree of constriction experienced by the veins, influencing the volume of blood held within venous reservoirs and blood pressure.

Medulla Oblongata

The lower portion of the brainstem that regulates vital functions, such as heart rate and breathing.