BMS 329 Exam 2 - Iowa State Questions
With Complete Answers
1. Which heart chamber is directed cranially in domestic animals?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle - ANSWER Right Atrium
2. Which feature of the heart is directed dorsally in the animal's body cavity?
A. Apex
B. Right side
C. Left side
D. Base - ANSWER Base
3. Which heart chamber receives oxygenated blood from the lungs?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle - ANSWER Left Atrium
4. Which of the following valves is not a tricuspid?
A. Cardiac
B. Pulmonary
C. Right A-V
D. Left A-V - ANSWER Left A-V
5. Heartworm disease is caused by parasitic worms living in the right side of the
heart. Treatment involves drugs which kill the worms but a dangerous
complication of this is dead worms entering circulation. Which organ do you
think is most affected by this?
A. Lungs
B. Kidneys
C. Liver
D. Brain - ANSWER Lungs
6. Which cardiac valve is also known as the mitral valve?
A. Right A-V valve
B. Pulmonary valve
, C. Left A-V valve
D. Aortic valve - ANSWER Left A-V Valve
7. Where does the extracellular Ca2+ come from that initiates cardiac myocyte
contraction?
A. Sarcoplasmic reticulum
B. Myofilaments
C. Sarcolemma
D. T-tubules - ANSWER T-tubules
8. Which component of the cardiac conduction system receives electrical input
from the atria?
A. Purkinje fibers
B. Bundle of His
C. Sinoatrial node
D. Atrioventricular node - ANSWER Atrioventricular Node
9. Ca2+ is required for a cardiac myocytes to contract. Where does the majority
of this Ca2+ come from?
A. Extracellular fluid
B. Mitochondria
C. T tubules
D. Sarcoplasmic reticulum - ANSWER Sarcoplasmic Reticulum
10. The drug verapamil is a Ca2+ channel blocker. What effect would this drug
have on cardiac contractility and heart rate?
A. Increase
B. Decrease - ANSWER Decrease
11. Which of the following statements is true?
A. Purkinje fibers are special nerves that spread the action potential through the
ventricles.
B. Heart rate is determined by spontaneous contraction of the ventricles
C. Cardiac action potential passes from cell to cell without nerves
D. Sinoatrial node passes the cardiac action potential through the skeleton -
ANSWER Cardiac action potential passes from cell to cell without nerves
12. What would happen to the P-R interval on an ECG if an animal had been given
verapamil (a drug that blocks Ca2+ channels and slows down conduction)?
A. Increase
B. Decrease
C. Not affected - ANSWER Increase
13. Which feature of the ECG corresponds to conduction of the action potential
through the Purkinje fibers? Q wave What produces the first heart sound?
A. Closure of the A-V valves
With Complete Answers
1. Which heart chamber is directed cranially in domestic animals?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle - ANSWER Right Atrium
2. Which feature of the heart is directed dorsally in the animal's body cavity?
A. Apex
B. Right side
C. Left side
D. Base - ANSWER Base
3. Which heart chamber receives oxygenated blood from the lungs?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle - ANSWER Left Atrium
4. Which of the following valves is not a tricuspid?
A. Cardiac
B. Pulmonary
C. Right A-V
D. Left A-V - ANSWER Left A-V
5. Heartworm disease is caused by parasitic worms living in the right side of the
heart. Treatment involves drugs which kill the worms but a dangerous
complication of this is dead worms entering circulation. Which organ do you
think is most affected by this?
A. Lungs
B. Kidneys
C. Liver
D. Brain - ANSWER Lungs
6. Which cardiac valve is also known as the mitral valve?
A. Right A-V valve
B. Pulmonary valve
, C. Left A-V valve
D. Aortic valve - ANSWER Left A-V Valve
7. Where does the extracellular Ca2+ come from that initiates cardiac myocyte
contraction?
A. Sarcoplasmic reticulum
B. Myofilaments
C. Sarcolemma
D. T-tubules - ANSWER T-tubules
8. Which component of the cardiac conduction system receives electrical input
from the atria?
A. Purkinje fibers
B. Bundle of His
C. Sinoatrial node
D. Atrioventricular node - ANSWER Atrioventricular Node
9. Ca2+ is required for a cardiac myocytes to contract. Where does the majority
of this Ca2+ come from?
A. Extracellular fluid
B. Mitochondria
C. T tubules
D. Sarcoplasmic reticulum - ANSWER Sarcoplasmic Reticulum
10. The drug verapamil is a Ca2+ channel blocker. What effect would this drug
have on cardiac contractility and heart rate?
A. Increase
B. Decrease - ANSWER Decrease
11. Which of the following statements is true?
A. Purkinje fibers are special nerves that spread the action potential through the
ventricles.
B. Heart rate is determined by spontaneous contraction of the ventricles
C. Cardiac action potential passes from cell to cell without nerves
D. Sinoatrial node passes the cardiac action potential through the skeleton -
ANSWER Cardiac action potential passes from cell to cell without nerves
12. What would happen to the P-R interval on an ECG if an animal had been given
verapamil (a drug that blocks Ca2+ channels and slows down conduction)?
A. Increase
B. Decrease
C. Not affected - ANSWER Increase
13. Which feature of the ECG corresponds to conduction of the action potential
through the Purkinje fibers? Q wave What produces the first heart sound?
A. Closure of the A-V valves
