Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following is/are correct related to Adrenalin hormone? (i) Heart beats faster (ii) Breathing rate increases (iii) Decreases blood pressure
Only (ii) and (iii)
Only (i) and (iii)
Only (i) and (ii)
(i), (ii) and (iii)
Only (i) and (ii)
Adrenalin, also known as epinephrine, is a hormone released by the adrenal glands during stress or excitement, triggering the 'fight-or-flight' response. This response increases the heart rate and breathing rate to prepare the body for intense physical activity, while it increases (rather than decreases) blood pressure to redirect blood flow to vital organs and muscles.
Adrenalin, also known as epinephrine, is a hormone released by the adrenal glands during stress or excitement, triggering the 'fight-or-flight' response. This response increases the heart rate and breathing rate to prepare the body for intense physical activity, while it increases (rather than decreases) blood pressure to redirect blood flow to vital organs and muscles.
Think of adrenalin as a 'turbo-boost' button in a car; when you press it, the engine (your heart) revs faster, the air intake (your lungs) increases to feed the engine, and the fuel pressure increases to deliver energy to the wheels (your muscles) rapidly.
The '3 Fs' of Adrenalin: Fight, Flight, or Fright.
CO=HR├ЧSV тАФ where Cardiac Output (CO) is the product of Heart Rate (HR) and Stroke Volume (SV); adrenalin increases both to raise blood pressure.
Adrenalin binds to adrenergic receptors in various tissues. In the heart, it stimulates the pacemaker cells to increase the firing rate, thus increasing the heart rate. In the lungs, it causes bronchodilation (widening of the airways), which increases the breathing rate and oxygen intake. It also causes vasoconstriction in non-essential areas and vasodilation in skeletal muscles, leading to an overall increase in systemic blood pressure.
Adrenalin is produced by the adrenal medulla.
It initiates the emergency response mechanism known as the fight-or-flight response.
It causes an increase in heart rate, breathing rate, and blood pressure, not a decrease.
It promotes the breakdown of glycogen into glucose in the liver to provide immediate energy.
Ensures survival in dangerous or stressful situations.
Increases alertness and reaction speed.
Chronic stress leads to long-term elevated blood pressure which can damage the cardiovascular system.
Used in medical emergencies to treat severe allergic reactions (anaphylaxis).
Used in CPR to stimulate the heart.
Adrenalin acts on ╬▒ and ╬▓ adrenergic receptors.
Statement (iii) is incorrect because adrenalin causes blood pressure to rise, not decrease.
C is correct тАФ Adrenalin increases heart rate and breathing rate, but it causes an increase in blood pressure, making statements (i) and (ii) correct.
Always remember that during stress/emergency, the body aims to increase nutrient and oxygen delivery to muscles, which necessitates increased heart rate and blood pressure.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants