Concept explainers
Introduction:
The two systems responsible for maintaining homeostasis in the body are the endocrine system and the nervous system. The endocrine system releases various hormones that function to regulate different physiological processes of the body. The hormones control vital processes such as electrolyte balance, temperature regulation, and osmotic balance.
Answer to Problem 1RAC
The correct answer is option (c) uses blood-borne chemical messengers.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) uses blood-borne chemical messengers. The endocrine system uses hormones that are released in the blood circulation and not into any ducts. The hormones directly affect the target cell or tissue by reaching through the blood. So, this system uses blood-borne chemical messengers. So, the correct answer is option (c).
Explanation for incorrect answer:
Option (a) is faster-acting than the nervous system. Endocrine systems are slower than the nervous system as it releases hormones that reach the target cells and results in slower and permanent response. So, this is an incorrect option.
Option (b) produces effects that are of shorter duration. The effects produced by the nervous system are of shorter duration as they only last till the time neural impulse is generated whereas; the response of the endocrine system lasts long. So, this is an incorrect answer.
Option (d) produces more localized effects. The endocrine system produces a widespread effect as it is interlinked with many physiological processes and the effect of the nervous system is more localized. So, this is an incorrect answer.
Option (e) relies less on chemical messengers. The endocrine system relies on chemical messengers as hormones that constitute the major part of the endocrine system are chemical messengers. So, this is an incorrect answer.
The endocrine system uses chemical messengers called hormones that travel through the blood and reach the target cell or tissue. Hence, the correct answer is option (c) uses blood-borne chemical messengers.
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