3 Exams All Versions; Latest Questions With Verified Answers
Institution: Portage Learning
Course Code: BIOL351/BIOD351
Course Title: Pharmacology
Exam: Module 3 Exams
Topic: Cardiology And Nephrology
Edition: Updated Version
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, Module 3. Cardiology And Nephrology
Question 1.
In The Blood Pressure Equation BP = CO \Times SVR, Which Factor Is Primarily
Determined By The Diameter And Flexibility Of The Blood Vessels?
A. Cardiac Output (CO)
B. Stroke Volume (SV)
C. Heart Rate (HR)
D. Systemic Vascular Resistance (SVR)
ANS. D.
Explanation: Systemic Vascular Resistance (SVR) Is Primarily Determined By The
Diameter And Flexibility Of Blood Vessels. Vasoconstriction Increases SVR And Blood
Pressure, While Vasodilation Decreases SVR And Blood Pressure.
Question 2.
Which Physiological Response Occurs When The Kidneys Detect A Decrease In Blood
Pressure?
A. Increased Excretion Of Sodium
B. Release Of Renin
C. Decreased Systemic Vascular Resistance
D. Suppression Of The Sympathetic Nervous System
ANS. B.
Explanation: When The Kidneys Detect Decreased Blood Pressure Or Decreased Renal
Perfusion, They Release Renin. Renin Initiates The Renin-Angiotensin-Aldosterone
System (RAAS), Which Ultimately Increases Blood Pressure.
Question 3.
What Is The Primary Mechanism Of Action Of Thiazide Diuretics Like
Hydrochlorothiazide In The Treatment Of Hypertension?
,A. Blocking Beta-1 Receptors In The Myocardium
B. Directly Inhibiting The Conversion Of Angiotensin I To II
C. Increasing Sodium And Water Excretion By The Kidneys
D. Inhibiting Central Alpha Receptors In The Brain
ANS. C.
Explanation: Thiazide Diuretics Such As Hydrochlorothiazide Increase Sodium And
Water Excretion By The Kidneys. This Decreases Extracellular Fluid Volume And
Contributes To A Reduction In Blood Pressure.
Question 4.
A Patient Presents With A Blood Pressure Reading Of 135/85 Mmhg. According To
Standard Hypertension Classifications, This Patient Is Categorized As:
A. Prehypertensive
B. Hypertensive Stage 1
C. Normal
D. Hypertensive Stage 2
ANS. B.
Explanation: A Blood Pressure Of 135/85 Mmhg Falls Within The Stage 1 Hypertension
Range Under The Commonly Used Classification In Which Systolic Blood Pressure Of
130–139 Mmhg Or Diastolic Blood Pressure Of 80–89 Mmhg Is Considered Stage 1
Hypertension.
Question 5.
Which Medication Is Classified As A Centrally Acting Alpha Agonist?
A. Clonidine
B. Carvedilol
C. Doxazosin
D. Metoprolol
ANS. A.
, Explanation: Clonidine Is A Centrally Acting Alpha-2 Agonist. It Decreases
Sympathetic Nervous System Activity, Resulting In Reduced Heart Rate, Cardiac Output,
And Vascular Resistance, Thereby Lowering Blood Pressure.
Question 6.
How Do Peripherally Acting Alpha Blockers Like Doxazosin Reduce Blood Pressure?
A. By Inhibiting The Thirst Center In The Hypothalamus
B. By Causing Vasodilation Through The Blockade Of Alpha Receptors In Vessels
C. By Increasing The Release Of Norepinephrine
D. By Decreasing Heart Rate And Force Of Contraction
ANS. B.
Explanation: Doxazosin Blocks Peripheral Alpha-1 Receptors On Vascular Smooth
Muscle. This Causes Vasodilation, Decreases Systemic Vascular Resistance, And Lowers
Blood Pressure.
Question 7.
Which Of The Following Describes 'Secondary Hypertension'?
A. High Blood Pressure Caused By An Underlying Condition Like Renal Disease
B. Hypertension That Only Occurs During Exercise
C. High Blood Pressure With An Unknown Cause
D. Hypertension That Is Unresponsive To All Medications
ANS. A.
Explanation: Secondary Hypertension Results From An Identifiable Underlying
Condition. Renal Disease Is An Important Cause Because The Kidneys Play A Major
Role In Regulating Blood Volume And Blood Pressure.
Question 8.
Which Adrenergic Agent Blocks Both Alpha And Beta Receptors To Treat Hypertension
And Heart Failure?
A. Atenolol
B. Carvedilol