L10 Flashcards

1
Q

is pressure high or low in venous system?

A

low

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2
Q

Is pressure high or low in arterial system?

A

high

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3
Q

what equation is used to find flow?

A

Q = Pressure difference/resistance

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4
Q

what equation is used to find mean arterial presusre?

A

Q (flow) x resistance

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5
Q

how is cardiac output determined?

A

stroke volume x heart rate

contraction strength, contraction rate

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6
Q

What is the function of AV node

A

Pauses electrical signal while the atria finish contracting

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7
Q

What are the 3 general functions of blood?

A

Transport
immune response
coagulation

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8
Q

What are the 3 main transports of blood?

A

O2, water, nutrients, CO2 waste products

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9
Q

What are the 3 other transports of blood?

A

Heat, Hormones, immune cells and coagulation factors

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10
Q

what is coagulation and how?

A

Stop bleeding, platelets, coagulation

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11
Q

what is the 2 main composites of blood?

A

plasma and formed elements

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12
Q

What is in plasma?

A

water, plasma proteins, other solutes

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13
Q

What does plasma proteins do?

A

maintain osmotic pressure and immune response

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14
Q

What are in formed elements?

A

platelets, red and white blood cells

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15
Q

What do formed elements do?

A

immune response

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16
Q

what is haematopoiesis?

A

formation of blood cells, in red bone marrow from stem cells

blood cells are progenitors for all blood cells

17
Q

What is the shape of eythrocytes and why?

A

biconcave disc, large surface area:volume ratio for diffusion for transport

flexibility

18
Q

What is inside an erythrocyte?

A

Haemoglobin

19
Q

what is erythropoiesis? EPO

A

Production of RBC requiring iron to make haemoglobin

20
Q

how does your body know to EPO?

A

kidney senses low oxygen and releases EPO to bone marrow stimulating RBC production

21
Q
A