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Flashcards in Cardiovascular system Deck (113)
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91

List characteristics of an Elastic Artery

Contain high proportion of elastic fibres in tunica media
Thick walled
Found near the heart
Large lumen

92

What is another name for Elastic Arteries

Conducting Arteries

93

List characteristics of Muscular Arteries

Medium sized
Contain more smooth muscles
Contain fewer elastic fibres

94

What are Muscular arteries otherwise known as?

Distributing arteries

95

List examples of Muscular arteries

Axillary
Brachial
Radial
Splenic
Femoral
Popliteal
Tibial

96

What is the function of arterioles?

Regulate blood flow to capillaries by altering diameter of capillaries.

97

What tissue are capillaries composed of?

Tunica Intima

98

What is a function of capillaries?

Linking arterioles to venules
Allow water, nutrients, gases and waste products in and out of blood supply

99

Which two sites of the body do not contain capillaries?

Cornea of the eye
Epidermis of the skin

100

What type of specialist cell are found in venules?

Fibroblasts

101

Which has a larger lumen, vein or artery?

Vein

102

What do veins have that arteries do not?

Bicuspid Valves

103

What is Blood Pressure?

The force exerted by the circulating blood on the walls of the blood vessels. It refers to Arterial blood pressure

104

What are the 3 main factors that regulate blood pressure?

Neuronal regulation
Hormonal regulation
Autoregulation of blood pressure

105

Where are the baroreceptors located?

Carotid sinus & Aortic arch

106

Where are the chemoreceptors located?

Aortic and carotid bodies

107

What is the function of the aortic and carotid bodies?

They detect changes in oxygen, carbon dioxide and hydrogen ion concentrations

108

List 5 hormones involved in BP regulation

Renin-angiotensin system
Epinephrine (adrenalin)
Norepinephrine (noradrenaline)
Antidiuretic hormone
Natriuretic peptide

109

List 5 factors that affect BP
(Not age, gender, stress, hormones, drugs

Cardiac Output
Circulating Volume
Peripheral Resistance
Blood viscosity
Hydrostatic pressure

110

What is the Aorta?

First major blood vessel of the arterial circulation. Emerges from the left ventricle of the heart

111

What is a baroreceptor?

A neuron sensing changes in fluid, air and blood pressure

112

What is a chemoreceptor?

A sensory receptor that detects the presence of a specific chemical

113

What is erythema?

A superficial reddening of the skin