Biology Chemical Coordination ETEA 2022
PMDC Verified Question 32 of 50
Hormone are usually:
A
Genetical messengers
B
Physical messengers
C
Chemical messengers
D
Biological catalyst
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Chemical messengers
Concept:

The endocrine system regulates the body through the secretion of highly specific molecules into the extracellular fluid.

Solution:

  • Hormones act as chemical messengers that travel through the bloodstream to bind to specific receptors on distant target cells, eliciting a physiological response.


Why other options are incorrect:

Biological catalysts are enzymes, which speed up biochemical reactions but do not act as long-distance communicators. Hormones are chemical, not physical or strictly genetic messengers.

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