Here is the PowerPoint from yesterday. Just click on the link below:

Vacular System

Here are the notes I took in class to go along with the PowerPoint:

Slide 2:

arterioles are smaller arteries

venules are smaller veins

Slide 3:

do veins pulse? No!! They have a thin middle layer because they do not regulate blood pressure.

arteries constrict or dilate. (see page 292-293).

Slides 4-6:

Exchange of materials: FOG (read page 295) for more information.

F=Filtration

O=Osmosis

G=Gases (move by diffusion)

Slide 7:

Hormones affecting Blood Pressure. Look at the diagram and read page 309.

*know that the kidney excretes Na+ ions and water, which decreases blood volume and lowers blood pressure.

What are organs involved with blood pressure? liver, lungs, kidney…

Slide 8: The Renin-Angiotensin Mechanism

see page 310-311

involves the kidneys. When blood pressure decreases, the kidneys secrete renin.

Slide 9: Nervous mechanisms that regulate blood pressure

see page 311-313