What sentence best supports the statement that hormones are involved in the regulation of homeostasis?
A.
The hormone erythropoeitin increases the production of red blood cells when oxygen levels are low.
B.
The hormone melatonin induces sleep and its production is slowed by exposure to light.
C.
The hormone oxytocin promotes labor contractions of the uterus during childbirth.
D.
The hormone cortisol suppresses the immune system and is produced when the body is under stress.
Answers
Answer:
Option C. The hormone erythropoietin increases the production of red blood cells when oxygen levels are low best supports the statement that hormones are involved in the regulation of homeostasis.
Homeostasis refers to the ability of the body to maintain a constant internal environment in response to external changes. For example, maintenance of body temperature (37°C in humans), electrolyte and water balance, pH balance etc.
Homeostasis is regulated by endocrine and nervous system with the help of feedback mechanisms. For example, erythropoietin plays a major role in regulating the oxygen-homeostasis in the body. It does so by regulating the oxygen carrying capacity of the blood.
when less oxygen is present in blood, EPO gene up-regulate the formation of erythropoietin which acts on the erythroid progenitor cells in the bone marrow. It increases the number red blood cells in the blood and thus the oxygen carrying capacity.
From the given options ( A) is correct.
Explanation:
Hormones
These are the secretions of endocrine glands also called chemical messengers.
Homeostasis
It is the tendency of body to maintain the internal environment of the body constant.
Option A is the best statement as it shows the immediate response of body to maintain internal body condition constant even when outer environment has changed.
Hence, A is the correct answer to this question.