Circulatory system
Deep Dive into the Circulatory System
Test your knowledge of the circulatory system with our comprehensive quiz! This quiz covers various aspects of blood vessels, heart structures, and the lymphatic system. Perfect for students, teachers, and anyone interested in human biology.
Features of the Quiz:
- 29 detailed questions
- Multiple choice and checkbox formats
- Instant feedback on your answers
Capillaries
Connects arterioles with venules
Connects arteries and veins
Are sites of metabolic exchange between blood and tissue
Continuously participates in the formation of the blood-brain barrier
Sinusoidal capillaries has continuous basal lamina
Sinusoidal capillaries have discontinuous basal lamina
Pericytes can be found in the wall of capillaries
Capillaries are the smallest vessels in the body
Discontinuous capillaries; sinusoidal capillaries
Are present within the bone marrow, liver and spleen
Their basal lamina is discontinuous; or absent
Can have pericytes present in their wall
Have discontinuous endothelium but continuous basal lamina
Permits the maximal exchange of macromolecules, and allowsveasier movement of cells between tissues
Permits interexchange between blood and tissues
Their endothelial cells are penetrated by numerous fenestrations
Their basal lamina is continuous
Are characteristic for the bone marrow
Are typical for the spleen
Have large fenestrations within basal lamina
True about capillaries
Are the largest blood vessels
Sinusoidal capillaries are found in the bone marrow
Continuously forms a blood-brain barries
Are the smallest blood vessels
Muscular arteries
The tunica media contains up to 40 layers of smooth muscle cells
Smooth muscle cells are present for contraction and relaxation
Vasa vasorum are found in the tunica adventitia
The tunica media never contains elastic fibers
Are known as distributing arteries
External elastic lamina is present only in the larger muscular arteries
Veins
Are responsible for delivering oxygen to the inner environment
Are responsible for carrying the blood back to the heart from organs
Small to medium sized veins have valves
The lumen of veins are usually collapsed
Larger veins have a well developed tunica intima
The tunica adventitia is the best developed layer
Larger veins usually has a relatively thin tunica media
Medium to larger sized veins contains valves
Contains external elastic lamina
Does not contain external elastic lamina
Purkinje fibers of the heart
Branches of bundle of His
Branches of atrioventricular node
Specialized to conduct nerve impulses
Modified cardiac muscle fibers
Endocardium
Lined with endothelium
Its parts is smooth muscle cells and elastic fibers
Subendocardium contains purkinje fibers
The endocardium is an elongation of the tunica intima of large vessels
The endocardium is the widest part of the heart
Endothelial cells are here, they modulate many aspects of normal hemoestasis
Elastic arteries
The elastic laminae is prominent in the tunica media
Consists of vasa vasorum in the tunica adventitia
There are no fibroblasts present within the tunica media
Its internal elastic lamina is the border between the tunica intima and media
Does not have a tunica media
Includes the aorta and its branches
Contains smooth muscle cells in its tunica media
Contains elastic laminae in tunica intima and media
An internal elastic lamina is present in tunica intima
Features of the vessels
Veins have a poorly developed tunica adventitia
Pericytes are enclosed in its own basal lamina
Each kind of blood vessel is lined with endothelium
Pericytes have mesenchymal origin
Pericytes originate from the mesoderm
The conducting system of the heart
Is located within the subendocardial layer and the myocardium
Is created by smooth muscle cells
Is created by modified cardiac muscle cells
Consists of the sinoatrial node
Contains Purkinje fibers
Atrioventricular node
Atrioventricular bundle; of his
Mark correct vessels for area
Spleen - sinusoidal capillaries
Liver - continuous capillaries
Bone marrow - sinusoidal capillaries
Blood-brain barrier - sinusoidal capillaries
Blood-brain barrier - continuous capillaries
Renal glomerulus - fenestrated capillaries
Vasa vasorum can be found:
Tunica adventitia of small cfapillaries
Tunica intima of medium arteries
Internal elastic lamina
Tunica media of large vessels
Tunica adventitia of large vessels
Fenestrated capillaries with diaphragms are located in:
Small intestine
Endocrine glands
Renal glomerulus
Pericytes
Occures in the capillaries and postcapillary venules
Occures along the outside of capillaries and small venules
Contains myosin, actin, tropomyosin and protein kinase which are related to contraction
Forms the continuous layer of the capillaries
Participate in the repair process
Have mesenchymal origin
Have their own basal lamina
Sentences related to arterioles
Are less than 0.5 mm in diameter
Tunica media contains one or two layers of smooth muscle cells
Tunica media contains numerous layers of smooth muscle cells
Tunica adventitia is the thickest tunica
Tunica adventitia presents as very thin in arterioles
External elastic lamina is prominent
Tunica intima
Is always present in blood vessels
Is thicker in elastic arteries than in muscular arteries
Endothelial cells lie on the basal lamina
Sentences describing veins
Their tunica media is much more developed than within arteries
Their walls are unnucleated
Their tunica adventitia often contains longitudinal bundles of smooth muscle cells
Their tunica media is less developed than within arteries
Which statement regarding muscular arteries are correct?
Muscular arteries distribute blood to organs
They contain very prominent internal elastic lamina
They have a poorly developed tunica media
They have a well developed tunica media
They contain very wavy tunica intima
They do not contain a tunica adventitia
They carry blood from the organs to the heart
Statements regarding discontinuous capillaries
They are also reffered to as sinusoidal capillaries
They are characteristic for the bone marrow
They are typical for the spleen
The endothelial cells are penetrated by numerous fenestrations
Between endothelial cells there are large perforations
They have large fenestrations within the basal lamina
Their basal lamina is continuous
They are found within muscles
Statements regarding veins
Large veins contains a well-developed tunica intima
They have a large, collapsed lumen
They carry blood back to the heart from the organs
Their tunica media is more developed than within arteries
The adventitial layer very often contains longitudinal bundles of smooth muscle cells
Their tunica media is less developed than within arteries
They do not contain tunica intima
They have valves
Statements regarding continuous capillaries
They have many tight, occluding junctions between endothelial cells
They can be found in muscles
The endothelial cells are penetrated by numerous fenestrations
They have large fenestrations within their basal lamina
They have no basal lamina
Are found in the bone marrow
Their basal lamina is continuous
They are typical for the spleen
Statements regarding the impulse conducting system of the heart
Sinusoidal node is its part
The subendocardial conducting network is part of in; Purkinje fibers
It is involved in controlling the contractions of the myocardium
It is involved in controlling the contraction of the endocardium
Atrioventricular bundle; of His, is its part
Atriventricular node is its part
Statements regarding pericytes
They have their own basal lamina
They have mesenchymal origin
They are located along the outside of the capillaries and small venules
They contain myosin, actin, tropomyosin and protein kinase, which are related to contraction
They are located along the outside of the elastic arteries
Do not have basal lamina
Statements regarding capillaries
Continuous capillaries participate in the formation of the blood-tissue barrier; blood-brain barrier
Are sites of metabolic exchange between blood and tissues
Continuous capillaries are also called somatic
Fenestrated capillaries are also called somatic
Fenestrated capillaries are also called visceral capillaries
Discontinuous capillaries are also called sinusoidal capillaries
There are no basal lamina present in fenestrated capillaries
Continuous capillaries are characterized by the absence of basal lamina
Contains smooth muscle cells in their walls
Fenestrated capillaries have discontinuous basal lamina
Statements regarding the wall of the heart
Endocardium is covered by endothelium
Subendocardium contains the Purkinje fibers
Epicardium is covered by the mesothelium
The myocardium is the thickest layer of the heart
Epicardium corresponds to the visceral layer of the pericardium
The pericardium is the membrane that surrounds the heart
The myocardium is mostly composed of cardiac muscle
The myocardium is the thinnest layer of the wall of the heart
Statements regarding the lymphatic vascular system
Most tissues containing blood vessels also contains lymphatic capillaries
CNS and bone marrow does not contain lymphatic capillaries
Large lymphatic vessels have no internal valves
Large lymphatic vessels contain valves
Large lymphatic vessels have numerous smooth muscle in their walls
Large lymphatic vessels have connective tissue in their walls
Lymphatic capillaries consists of a single layer of endothelial cells
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