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chapter 20

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Quiz on chapter 20, created by Catherine Oh on 02/08/2018.
Catherine Oh
Quiz by Catherine Oh, updated more than 1 year ago
Catherine Oh
Created by Catherine Oh over 7 years ago
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Resource summary

Question 1

Question
This portion protects and anchors the hearts, preventing overstretching. It is made from dense irregular connective tissue.
Answer
  • mediastinum
  • epicardium
  • fibrous pericardium
  • endocardium

Question 2

Question
The [blank_start]serous[blank_end] pericardium consists of the parietal layer which is fused with fibrous [blank_start]pericardium[blank_end] and a [blank_start]visceral[blank_end] layer which is the epicardium that holds direct contact with the heart.
Answer
  • serous
  • pericardium
  • visceral

Question 3

Question
Serous fluid is found outside of the parietal and visceral pericardia in the pericardial cavity.
Answer
  • True
  • False

Question 4

Question
Grooves on the outside of the heart that separate the chambers called [blank_start]sulci[blank_end]. They contain blood vessels and [blank_start]fat[blank_end].
Answer
  • sulci
  • fat

Question 5

Question
What are all the correct characteristics about the auricle?
Answer
  • Is a pouch-like structure on the anterior surface of atrium.
  • Is found between the parietal and visceral pericardia in the pericardial cavity.
  • Helps holds atria hold a greater volume of blood.
  • Are found on the left and right side of the heart.

Question 6

Question
Which chambers are the receiving chambers of the heart?
Answer
  • ventricles
  • atria
  • superior and inferior vena cava
  • tricuspid (AV) valve

Question 7

Question
What right atrium receives blood from what 3 sources?
Answer
  • superior vena cava
  • inferior vena cava
  • coronary sinus
  • left ventricle

Question 8

Question
What is another name for the aortic valve?
Answer
  • semilunar valve
  • atrioventricular valve

Question 9

Question
These valves prevent backflow from the ventricles to the atria.
Answer
  • left and right atrioventricular valves
  • left and right semilunar valves

Question 10

Question
These valves prevent backflow from the arteries into the ventricles.
Answer
  • Atrioventricular valve
  • Semilunar valve

Question 11

Question
The right AV valve is also known as the:
Answer
  • bicuspid
  • mitra
  • tricuspid

Question 12

Question
What portion of the heart supplies heart cells with fresh oxygen and nutrients?
Answer
  • coronary veins
  • coronary arteries
  • semilunar valves
  • atrioventricular valves

Question 13

Question
These structures collect waste from cardiac muscle and drain into a large vein (coronary sinus) which then empties into the right atrium.
Answer
  • coronary veins
  • coronary arteries
  • sinoatrial node
  • purkinje fibers

Question 14

Question
What are some characteristics of cardiac muscle?
Answer
  • branched
  • intercalated discs
  • gap junctions
  • desmosomes
  • voluntary
  • multi-nucleated

Question 15

Question
The presence of [blank_start]creatine[blank_end] kinase in the blood indicates injury of skeletal or cardiac muscle cells. This is often an indicator of a myocardial [blank_start]infarction[blank_end].
Answer
  • creatine
  • infarction

Question 16

Question
Name the correct structures. (singular)
Image:
Cardiac Myofiber Desmosomes, Etc (binary/octet-stream)
Answer
  • intercalated disc
  • gap junction
  • desmosome

Question 17

Question
What are these structures? Give the actual names, not the kind of filament.
Image:
Cardiac Myofiber (binary/octet-stream)
Answer
  • actin
  • myosin

Question 18

Question
What type of contraction does each colour indicate?
Image:
Contraction (binary/octet-stream)
Answer
  • atrial
  • ventricular

Question 19

Question
Auto-rhythmic fibers repeatedly generate spontaneous action potentials that then trigger heart [blank_start]contractions[blank_end]. First, they act as [blank_start]pacemakers[blank_end], and second they form the conduction system which [blank_start]propagates[blank_end] actions potentials through the heart muscle.
Answer
  • contractions
  • excitations
  • depolarizations
  • propagates
  • instigates
  • implicates
  • stimuli
  • controllers
  • pacemakers

Question 20

Question
What channels open for depolarization?
Answer
  • Ca2+
  • Na2+
  • K+

Question 21

Question
During the plateau phase, _______ channels opens and let ______ions enter from outside cell and from storage in SR.
Answer
  • Ca2+, Ca2+
  • Na2+, Ca2+
  • K+, K+
  • K+, Ca2+

Question 22

Question
After Ca2+ ions are open to enter the outside cells, Ca2+ binds to ________ to allow for actin-myosin cross-bridge formation and tension development. This is the beginning of muscle contraction.
Answer
  • troponin
  • epinephrine
  • myosin
  • actin

Question 23

Question
The refractory period is a period of time that a cell cannot be stimulated by another action potential.
Answer
  • True
  • False

Question 24

Question
Cardiac muscles rely on [blank_start]aerobic[blank_end] cellular respiration for [blank_start]ATP[blank_end] production. They have many [blank_start]mitochondria[blank_end] and use lactic acid produced by [blank_start]skeletal[blank_end] muscles.
Answer
  • ATP
  • aerobic
  • mitochondria
  • skeletal

Question 25

Question
One cardiac cycle consists of a systole and diastole of both atria, rapidly followed by the systole and diastole of both ventricles.
Answer
  • True
  • False

Question 26

Question
What is the sound of the first "lubb" in a heartbeat?
Answer
  • Blood turbulence during rapid ventricular filling.
  • Blood turbulence associated with closing of the AV valves after ventricular systole.
  • Blood turbulence associated with closing of the semilunar valves near the beginning of the ventricular diastole
  • Blood turbulence during atrial systole.

Question 27

Question
Blood turbulence associated with closing of the semilunar valves near the beginning of the ventricular diastole makes the second heart sound. ("dupp" of the lupp-dupp)
Answer
  • True
  • False

Question 28

Question
Blood turbulence during rapid ventricular filling makes the third heart sound during a cardiac cycle.
Answer
  • True
  • False

Question 29

Question
Blood turbulence during atrial systole is the fourth sound and is loud enough to hear after the first 2 closures of the heart.
Answer
  • True
  • False

Question 30

Question
Atrial systole is when blood is ejected and completely fills the ventricles.
Answer
  • True
  • False

Question 31

Question
What is the correct relationship between cardiac output, stroke volume and heart rate?
Answer
  • CO = HR X SV
  • HR = SV / CO
  • CO = SV / HR
  • SV = HR X CO

Question 32

Question
[blank_start]Stroke[blank_end] volume is the volume of blood ejected by the [blank_start]ventricle[blank_end] with EACH contraction.
Answer
  • Stroke
  • ventricle

Question 33

Question
Increased [blank_start]K+[blank_end] blocks generation of action potentials. Increased [blank_start]Na+[blank_end] blocks Ca2+ inflow. Increased [blank_start]Ca2+[blank_end] speeds heart rate and force of contraction.
Answer
  • K+
  • Na+
  • Na+
  • Ca2+
  • Ca2+
  • K+
  • Na+
  • K+

Question 34

Question
Elastic arteries include:
Answer
  • Pulmonary trunk
  • aorta
  • brachiocephalic subclavian
  • common carotid
  • common iliac
  • basilar arteries

Question 35

Question
What is an anatomses?
Answer
  • A division of a vein along a body part.
  • Very small artery that lowers pressure.
  • Union of two or more arteries supplying the same body region.
  • Connects arterioles and venules.

Question 36

Question
Capillaries only consist of what two structures?
Answer
  • endothelium and basement membrane
  • smooth muscle and endothelium
  • connective tissue and basement membrane
  • smooth muscle and basement membrane

Question 37

Question
Capillaries function of exchange of nutrients an wastes between blood and tissue fluid.
Answer
  • True
  • False

Question 38

Question
What two structures create a bloodflow called the microcirculation?
Answer
  • metarteriole
  • intercellular cleft
  • postcapillary venule
  • sinusoid

Question 39

Question
The myocardium consists of mostly [blank_start]cardiac[blank_end] muscle.
Answer
  • cardiac
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