Flashcards
Circulation
Flashcards do conjunto (24)
- 1Name the main types of Blood VesselVeins,
Artery,
Capillaries - 2Where do Veins carry blood ?Collects de-oxygenated blood from the capillaries and return the blood into the heart
- 3How are Veins adapted for their function ?They have thin walls and blood is at low pressure
- 4Why do the Veins contain valves ?To prevent the backflow of blood
- 5Where do Arteries carry blood ?Takes oxygenated blood away from the heart to the body organs and tissues
- 6How are Arteries adapted to their function ?Cell wall is thick and muscular so it can withstand high pressure of the blood being pumped directly from the heart
- 7Where do Capillaries carry blood ?Form a network to take blood through the organs and tissues
- 8How are Capillaries adapted to their function ?One cell thick which allows diffusion to happen quicker
- 9Is the blood from the Capillaries under any pressure ?Yes, water and other substances are squeezed out into the surrounding inter cellular spaces
- 10What is Plasma ?Is the liquid part of the blood - water (solvent)
- 11What does Plasma transport ?Carbon dioxide, Nutrients such as glucose ammino acids,Urea(waste substance) and Hormones
- 12What do Red Blood Cells do ?Absorb oxygen in the lungs and releases it into the rest of the body
- 13What do Red Blood Cells contain ?Haemoglobin.
Haemoglobin + oxygen --> oxyhaemoglobin - 14How are Red Blood Cells adapted to their function ?No nucleus. It has a biconcave shape (has an indentation) which means it has a larger surface area
- 15What is an symptom of Anemia ?Lack of iron means less Haemoglobin this means less oxygen therefore less respiration therefore less energy
- 16Name the two types of White Blood CellsPhagocytes
Lymphocytes - 17Describe how an Lymphocyte destroys a bacteriumProduce antibodies which stick to the antigens on the bacterium.
- 18What does an Lymphocyte cell look like ?They have a large nucleus where after the antibodies are produced,they stick to the antigens
- 19What is an Antibody ?Antibodies are soluble proteins that pass into the plasma
- 20What are Memory cells ?Sometimes lymphocytes develop into memory cells. Memory cells make us immune to a disease so if the same pathogen re infects the memory cells start to reproduce anitbodies to fight of the infection off quicker
- 21Describe how a Phagocyte destroys bacteriaThey change their shape by expanding their cytoplasm called Pseudopodia. The Pseuodpodia surround and engulf the microorganism which then releases enzymes to break the organism down
- 22What does a Phagocyte cell look like ?They have a cell membrane, cytoplasm and a nucleus. It has an abnormal looking nucleus
- 23What are Platelets ?They release an enzyme called Fibrin to make blood lots when we cut ourselves
- 24Suggest the consequence of having too few platelets in the bloodCould lose a lot of blood which can lead to bleeding to death and more bacteria infection can get in
Informações
- Descrição
- FlashCards sobre Circulation, criado por Kiran em 25-10-2013.
- Criado por
- Kiran
- Visualizações
- 40
- Avaliação