Heart - Advanced

Question 1

What are Venules?

Answer 1

Small veins that drain capillary beds and merge into larger veins.

Question 2

What are the components of Blood? What are the functions of these components ?

Answer 2

• Plasma = Carries water, electrolytes , nutrients, hormones and waste.
• Red blood Cells = contain hemoglobin
• white blood cells = part of immune system
• platelets = Essential for clotting

Question 3

Function of blood?

Answer 3

• Oxygen delivery
• carbon dioxide removal
• immune defence
  Homeostasis

Question 4

What regulates the Cardiovascular system?

Answer 4

• ANS: Sympathetic = increase heart rate , Parasympathetic = decreases heart rate via vagus nerve
• baroreceptors = sense changes in blood pressure
• chemoreceptors = monitor oxygen co2 and PH levels
• rhythm regulated by SA node
• hormonal regulation includes norepinephrine and anti diuretic hormone (ADH)
• Local regulation - Hypo/HyperTENSION

Question 5

What are the coronary arteries ?

Answer 5

Left and right coronary artery

• left takes oxygenated blood to heart
• supplies blood to right side of heart

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