cardiovascular system Flashcards
Which of the following types of sensory receptors are involved in the regulation of blood pressure?
Baroreceptors
Chemoreceptors
Proprioceptors
Osmoreceptors
Nociceptors
Baroreceptors
Complete the following sentence: Cardiac output equals…
stroke volume x resistance.
mean arterial blood pressure x resistance.
heart rate / viscosity.
heart rate / mean arterial blood pressure
heart rate x stroke volume
heart rate x stroke volume
Which of the following contains blood at the highest pressure?
Right atrium
Long saphenous vein
Radial artery
Aorta
Vena cava
Aorta
Which of the following contains blood at the highest pressure?
Right atrium
Long saphenous vein
Radial artery
Aorta
Vena cava
Aorta
Complete the following sentence: Baroreceptors are located in the…
walls of the aorta and carotid arteries.
Vagus nerve (X cranial nerve).
endocardium of the right ventricle.
active cells of the SA node.
medulla oblongata and pons.
walls of the aorta and carotid arteries.
Which of the following statements is TRUE?
Arterioles contain blood under lower pressure than that in capillaries
The wall of the arteriole consists primarily of elastic fibres in the tunica media
Arterioles only carry deoxygenated blood
Arterioles make a significant contribution to peripheral resistance
The arteriole is under the control of the parasympathetic nervous system
Arterioles make a significant contribution to peripheral resistance
Which of the following assists return of venous blood from the foot to the right atrium?
A system of valves within the veins
Elastic recoil of the artery
Gravity
Peristalsis
The sodium pump
A system of valves within the veins
Which of the following statements is TRUE?
The myocardium is the layer of tissue lining the heart
The heart beat is initiated by the sympathetic nervous system
The muscle layer of the heart wall is called the pericardium
The heart muscle can only contract following an external stimulus
Cardiac muscle fibres are connected to each other via intercalated discs and so contract as one unit
Cardiac muscle fibres are connected to each other via intercalated discs and so contract as one unit
Which of the following has most effect on peripheral resistance?
Blood conductivity
Stroke volume
Blood vessel diameter
Heart rate
Respiratory rate
Blood vessel diameter
Complete the following sentence: Movement of fluids and solutes out of capillaries into the interstitial fluid occurs by filtration, which is driven by…
blood hydrostatic pressure
endocytosis
venous valves
active transport
colloid osmotic pressure
blood hydrostatic pressure
Which of the following events would lead to increased blood pressure?
Increased heart rate
Decreased diameter of the arterioles
Increased blood volume
Increased vascular resistance
All of the above
All of the above
Complete the following sentence: The force and rate of cardiac contraction is inhibited by the…
parasympathetic nervous system.
Olfactory nerve.
sympathetic nervous system.
pericardium.
chordae tendinae
parasympathetic nervous system.
Which of the following terms describes the pressure exerted by the vessels on the circulating blood?
Stroke volume
Peripheral resistance
Circulating volume
Heart rate
Cardiac volume
Peripheral resistance
Which of the following cranial nerves provides parasympathetic innervation to the heart?
Accessory nerve
Optic nerve
Vagus nerve
Oculomotor nerve
Glossopharyngeal nerve
Vagus nerve
