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Leaving certificate biology

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  1. Ecology theory
    5 Topics
    |
    1 Quiz
  2. Unit 1
    Nutrient recycling
    4 Topics
    |
    1 Quiz
  3. Ecological relationships and population dynamics
    2 Topics
  4. Human impact on the ecosystem
    2 Topics
  5. Study of a grassland ecosystem
    3 Topics
  6. Responses in the Flowering Plant
    4 Topics
    |
    1 Quiz
  7. Unit 3
    Sexual reproduction in the flowering plant
    1 Topic
  8. The human reproductive system
    3 Topics
  9. The menstrual cycle
    2 Topics
  10. Pregnancy
    2 Topics
  11. The circulatory system
    4 Topics
  12. Blood
    5 Topics
  13. The heart
    5 Topics
Lesson 11, Topic 4
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The circulatory system past paper questions

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Explain what is meant by a portal system

A portal system begins and ens with capillaries

Answer

Draw a labelled diagram of a transverse and longitudinal section through a human vein to show its structure

Answer

In each of the following cases name a vein which fits the description

  1. Transports blood out of the muscle of the heart

  2. Brings blood away from the kidneys

  3. Carries very little carbon dioxide

  4. Brings blood into the right atrium

  5. Has capillaries at both ends

  1. Transports blood out of the muscle of the heart : Coronary veins

  2. Brings blood away from the kidneys: Renal vein

  3. Carries very little carbon dioxide: Pulmonary vein

  4. Brings blood into the right atrium: Vena cava

  5. Has capillaries at both ends: Hepatic portal vein

Answer

Briefly describe how blood is moved through veins

  • Skeletal or voluntary muscles contract

  • Pushes blood forwards

  • Valves prevent backflow

Answer

What is the function of the heart in the circulatory system ?

Pump

Answer

The human circulatory system is a closed system. Explain what is meant by a closed system. Give one advantage to humans in having a closed system

Closed: blood remains in blood vessels

Advantages: 

  • More efficient

  • Blood can be pumped faster

  • Allows blood flow to be increased or decreased to different organs 

Answer

Name the parts of the body connected by the hepatic portal vein

Stomach or intestines/Liver

Answer