Circulatory system & heart
Understanding the Circulatory System
Test your knowledge of the circulatory system and the heart with our comprehensive quiz! This quiz covers the structure and fun
Topics include:
- Veins and their characteristics
- Capillary types and fun
ctions - Heart anatomy and the conduction system
- Lymphatic vascular system
Which statements regarding veins are true?
They carry blood back to the heart from the organs
They have got muscles within their wall
They do not contain external elastic lamina
They contain large, collapsed lumen.
Large veins contain a well-developed intima.
Tunica media is better developed than within arteries
They do not contain tunica intima
The adventitial layer very often contains longitudinal bundles of smooth muscle
Which sentences are true?
The heart and blood vessels together make up the circulatory system
Vasa vasorum are "vessels of vessels" in tunica intima of large vessels
Vasa vasorum are "vessels of vessels" in tunica adventitia of large vessels
The circulatory system carries blood and dissolved substances to and from different in the body
Which statement regarding continuous capillaries is true?
They have many tight, occludin junctions between endothelial cells
They can be found in muscles
They are typical for spleen
They have no basal lamina
They are typical for liver
Which statement regarding capillaries is correct?
Continuous are also called somatic
In fenestrated the fenestrations have thin diaphragm
Continuous participate in formation of blood-tissue barrier
Continuous is characterized by absence of basal lamina
Continuous can be found in all type of muscle tissue
Fenestrated have transcellular openings in the endothelial layer
Which statement regarding endothelium is correct?
It is simple squamous epithelium
It can be found in the intima of artery
There is no endothelial cells in wall of lymphatic vessels
Can be found exclusively in capillaries
Endothelial cells are metabolic active cells
Is included in production of vasoactive factors
Is included in interchanges between blood and surrounding tissues
Which statement regarding pericytes is true?
They are located along the outside of the elastic artery
They contain myosin, actin, tropomyosin and protein kinase, wich are related to contraction
They do not posses of basal lamina
They have mesenchymal origin
Are important for maintaining the endothelial blood-brain barrier
After injury proliferate and differentiate to form smooth muscle
Secrete many ECM components
They are located along the outside of the capillaries and small venules
Which statement regarding discontinuous capillaries is correct?
Are found in bone marrow and spleen
Are also called sinusoids
There is no endothelium in their wall
Have discontinuos endothelium but continuous basal lamina
They have large fenestrations within basal lamina
Are sites of metabolic exchanges between blood and tissue
Permit maximal exchange of macromolecules, allow easier movement of cells between tissues
Between endothelial cells there are large perforations
Which statement regarding lymphatic vascular system is true?
Most tissues with blood vessels don't contain lymphatic capillaries
Large lymphatic vessels have numerous smooth muscle in their walls
Lymphatic capillaries consists of single layer of endothelial cells
Large lymphatic vessels have no internal valves
Which statement regarding elastic artery is correct?
Its wall is composed of three layers: tunica intima, t. Media and t. adventitia
Is the smallest type of the arteries
Its tunica media is composed of numerous elastic laminae
Its tunica media contains numerous smooth muscle cells
Its internal elastic lamina is the border between tunica intima and tunica media
Its external elastic lamina is the border between tunica intima and tunica media
Which statement regarding impulse conducting system of the heart is correct?
Subendocardial conducting network is not part of it
Sinoatrial node is its part
Atrioventricular node is its part
Atrioventricular bundle (of His) is its part.
It is involved in controlling the contraction of the myocardium
Internodal tracts are its part
Which statement regarding wall of the heart is correct?
Epicardium is covered by endothelium
Endocardium is covered by mesothelium
Subendocardium contains purkinje fibers
Myocardium is mostly composed of cardiac muscle
Myocardium is the thickest layer of the heart
Pericardium is the membrane that surrounds the heart
Epicardium corresponds to the visceral layer of the pericardium
Which statement regarding muscular arteries is correct?
They contain very prominent internal elastic lamina
They distribute blood to the organs
They help regulate by contracting or relaxing the smooth muscle in the tunica adventitia
They have not got any muscles within their wall
Tunica media is better developed that within veins
The adventitial layer very often contains longitudinal bundles of smooth muscle
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