Cardiovascular #2

The ​ (a)   detects changes in chemicals in the blood such as ​ (b)   and carbon dioxide. This sends a signal to the ​ (c)   in the brain, which passes the signal on to the ​ (d)   , also known as the pacemaker. Both atrium contract and the signal reaches the ​ (e)   which re-directs the signal down the HIS Bundle on to the Purkinje Fibres, which contract both ventricles

• chemoreceptor
• acid levels
• medulla oblongata
• SA Node
• AV Node
• heart
• septum
• atrium

What separates the left and right side of the heart?

• Septum

• Atrium

• Ventricle

• Myocardium

​ (a)   volume refers to the volume of blood pumped per beat. At rest, this is ​ ​ (b)   for an adult. During exercise, this ​ (c)   as a short-term effect of exercise. Long-term, the heart gets stronger known as ​​ (d)   , which increases stroke volume at rest. As a result, ​ (e)   decreases at rest.

• stroke
• 60-70 ml
• increases
• myocardium hypertrophy
• resting heart rate
• tidal
• 500 ml
• decreases

Which valve separates the aorta and the left ventricle?

• Tricuspid Valve

• Bicuspid Valve

• Aortic Valve

• Pulmonary Valve

During exercise, _______ output increases to meet energy and waste demands

Which blood vessel allows for diffusion?

• Arteriole

• Plasma

• Capillaries

• Venules

Deoxygenated blood travels from the ​ (a)   to the ​ (b)   into the right ventricle. It passes through the ​ (c)   and into the pulmonary artery. This flows off to the ​ (d)   where CO2 diffuses into the alveoli and O2 into the ​ (e)   . This returns in the pulmonary vein back to the heart.

• vena cava
• right atrium
• pulmonary valve
• lungs
• capillary
• artery
• aorta
• venule
• left atrium

Which elastic blood vessel contains smooth muscle in the walls and has high pressure blood inside?

• Capillary

• Artery

• The Heart

• Vein

In order to prevent backflow, veins contain ______.

Match the following components of blood

• Clots wounds

• Red blood cells

• Fight infection and disease

• Plasma

• Transport O2 and Co2

• Platelet

• Suspends all components of blood to support transport

• White blood cells