Ch 15 Vert Syst Phys

Front 1

Location of a receptors:
Responds to which hormone?
524

Back 1

Binding of norepinephrine on A receptors results in:

Higher affinity for norepinephrine than epinephrine

Hint 1

Vasoconstriction
Blood diverted from gi tract to skeletal muscles, liver, and heart

Front 2

B2 receptors locations
Binds to what hormones?
524

Back 2

Vascular smooth muscle of the heart, liver, and skeletal muscle arterioles

Binding of epinephrine results in:

Hint 2

Vasodilation
Increase blood to.heart, liver, skeletal muscles

Remember, no innervation, only responds to circulating epinephrine

Front 3

Continuous capillaries

Found in what parts of the body?

Back 3

Most common capillary, found in muscle, connective tissue, and neural tissue.

Important in blood brain barrier. Role of tight junctions?

Hint 3

Protects neural tissue from toxins in bloodstream

Junctions are not large enough for blood cells and proteins to through.

Front 4

Fenestrated capillaries

Found in which parts of the body?

Back 4

Kidneys, intestine, absorptive transporting epithelia

They have large pores to allow high volumes of fluid to pass rapidly.
most dissolved solutes diffuse freely

Front 5

Sinusoids

Found where?

Back 5

Locations where blood cells and plasma proteins need to cross the endothelium to hey into the blood.
1. Bone marrrow
2. Liver- lack of basal lamina allows more free exchange
3. Spleen

Sinusoids are not typical, they are 5 times wider than a capillary. They have fenestrations and may have gaps in between the cells

Front 6

Transcytosis

Back 6

How larger molecules molecules (and select proteins) are transported across endothelium
Endothelia fitted with caveolae and nonciated pits to form vesicles

Front 7

Bulk flow

Back 7

Mass movement of fluid regulated by hydrostatic and osmotic pressure gradients.
Osmotic pressure determined by solute concentration between plasma and interstitial fluid, mainly by proteins in the plasma, mostly absent in interstitial fluid

1. Absorption- bulk flow into capillary
2. Filtration- bulk flow out of capillary. Caused by hydrostatic pressure that forces fluid out of capillary through leaky junctions

Front 8

Colloid osmotic pressure (bulk flow)

Back 8

Osmotic pressure created by proteins.

Solutes do not contriibute because they can freely cross the endothelium.
Favors movement of water from interstitial fluid to the plasma

Is constant along length of capillary

Front 9

Capillary hydrostatic pressure

Back 9

Decreases along length of capillary because loss of energy to friction

Pressure of capillary at
Arterial end: 33 mmhg
Venous end: 15 mmhg
Interstitial fluid: 0

Means water movement goes out of the capillaries

Front 10

Filtration

Back 10

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