Blood - Cells & Vessels Flashcards by Isabella Smyth | Brainscape

Q

What is the composition of blood

A

55% plasma, 45% platelets

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Q

What is blood

A

type of connective tissue

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Q

What are erythrocytes

A

Red blood cells

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Q

What are the characteristics of erythrocytes

A

no nucleus, no DNA

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Q

What are leukocytes

A

white blood cells

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Q

What are leukocytes involved in

A

immune response

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Q

describe erythrocyte shape

A

biconcave

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Q

Why is erythrocyte shape biconcave

A

increase SA - pack haemoglobin

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Q

How are erythrocytes prodcued in adults

A

erythropoiesis

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Q

Where are erythrocytes produced in embyros

A

yolk sac

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Q

Where are erythrocytes produced post natally

A

bone marrow

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Q

what is erythrocyte production controlled by

A

erythropoietin

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Q

where is erythropoietin produced

A

kidney

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Q

what does erythropoietin stimulate

A

erythrocyte production

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Q

What is the effect of erythropoietin

A

increases stickness of blood

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Q

what is erythropoietin

A

hormone

Q

What are reticulocytes

A

immature red blood cells

Q

describe the structure of reticulocytes

A

anucleate, lots of RER

Q

How are leukocytes formed

A

leukopoesis

Q

what are the main types of leukocyte

A

agranulocytes, granulocytes

Q

What are the types of agranulocytes

A

lymphocytes, monocytes

Q

What are the types of granulocytes

A

neutrophils, eosinophils, basophils

Q

what are granulocytes involved in

A

intracellular processes

Q

What are the three layers in blood vessles

A

intima, media, adventitia

Q

what is leukopenia

A

decreased white blood cells

Q

Describe the pressure in the pulmonary system

A

low

Q

Describe the pressure in the systemic system

A

high

Q

What vessel maintains blood pressure

A

muscular arteries

Q

Which blood vessel layer is large in arteries

A

media

Q

TRUE or FALSE - capillaries have pores

A

TRUE

Q

Describe the intima layer

A

simple, squamous endothelium

Q

Describe the adventitia layer of blood vessels

A

connective tissue, external elastic layer