SCI 335 Week 10 Quiz 3

SCI 335 Week 10 Quiz 3 |  Wilmington University

Week 10: Test: Chapter 13

Question 1

The loose-fitting sac around the heart is the  

·         endocardium.  

·         parietal pericardium.  

·         epicardium.  

·         visceral pericardium.

 

Question 2

Which of the following layers of the heart and their functions are correctly matched?  

·         None of these is correct.  

·         Epicardium-protective inner lining of the heart chambers and valves  

·         Endocardium-protective outer covering  

·         Myocardium-muscular contractions that force blood out of the heart   

 

Question 3

A mass of interconnected cardiac muscle cells that act together as a group constitutes a(n) _____ _____ .

·         functional syncytium

·         functional syncytium

 

Question 4

The visceral pericardium lines the pericardial cavity, whereas the parietal pericardium covers the surface of the heart.  

·         True  

·         False   

 

Question 5

Blood is supplied to the myocardium by means of the _____ arteries.coronary

 

Question 6

Which of the following is not a normal result of training for endurance-type exercise?  

·         increase in stroke volume  

·         thickening of myocardium  

·         enlargement of the heart  

·         increase in heart rate   

 

Question 7

In an ECG pattern, the P-Q interval indicates how long it takes for the cardiac impulse to travel from the  

·         S-A node to the atrial muscle fibers. 

·         A-V node to the ventricular muscle fibers.  

·         A-V node to the atrial muscle fibers.    

·         S-A node to the ventricular muscle fibers.  

 

Question 8

Cells of the conducting system in the heart are more sensitive to which ion?  

·         Potassium     

·         sodium  

·         chloride  

·         calcium

 

Question 9

The pressure that remains in the systemic arterial system during ventricular relaxation is called _____ pressure.

·         diastolic

·         diastolic

 

Question 10

Which of the following is not a factor in cholesterol accumulation?  

·         exercise    

·         Gender     

·         genetic disposition

·         diet

 

 

Question 11

In an ECG pattern, the P wave is caused by  

·         polarization of ventricular muscle fibers.  

·         depolarization of atrial muscle fibers.    

·         polarization of atrial muscle fibers.  

·         depolarization of ventricular muscle fibers.

 

 

Question 12

The effect on the heart of an excess potassium ion concentration usually is  

·         increased rate and decreased force of contraction.  

·         decreased rate and increased force of contraction.  

·         increased rate and increased force of contraction.  

·         decreased rate and decreased force of contraction.  

 

Question 13

In an ECG pattern, the T wave is caused by  

·         repolarization of ventricular muscle fibers.    

·         depolarization of atrial muscle fibers.  

·         depolarization of ventricular muscle fibers.  

·         polarization of atrial muscle fibers.

 

 

Question 14

Impulses that are carried to the heart by means of the vagus nerve are  

·         parasympathetic impulses and cause the heart rate to increase.  

·         sympathetic impulses and cause the heart rate to increase.  

·         sympathetic impulses and cause the heart rate to decrease.   

·         parasympathetic impulses and cause the heart rate to decrease.

 

 

Question 15

Water and dissolved substances leave the arteriole end of a capillary due to _____ , and enter the venule end of a capillary due to ______ .  

·         None of these is correct.  

·         hydrostatic pressure being higher than osmotic pressure; active transport being greater than osmotic pressure  

·         osmotic pressure being higher than hydrostatic pressure; hydrostatic pressure being higher than osmotic pressure    

·         hydrostatic pressure being higher than osmotic pressure; osmotic pressure being higher than hydrostatic pressure 

 

Question 16

The great saphenous vein is the longest vein in the body.  

·         True     

·         False

 

Question 17

Arteries are strong, elastic vessels that carry blood to the heart.  

·         True  

·         False   

 

Question 18

Which of the following is least important in returning blood to the heart?  

·         valves in the veins  

·         the pumping action of skeletal muscles  

·         the pushing of blood by the arterial system   

·         negative intrathoracic pressure

 

Question 19

The descending aorta divides near the brim of the pelvis to form the right and left _____ _____ ____ .

·         common iliac arteries

·         common iliac arteries

 

Question 20

Blood from the face and scalp is drained by the  

·         subclavian vein.  

·         external jugular vein.  

·         inferior vena cava.  

·         cephalic vein.