T2 U5 Physiology of Circulation Flashcards
Name the 3 vital signs
Pulse, respiratory rate, Body temp
Define arterial pulse
Alternating expansion and recoil of an artery that occur w/ each beat of the LV creates psi wave travels through entire arterial system
What may influence arterial pulse
Activty, posture change, emotions
What is a pressure point
Compressed to stop blood flow to distal tissue
Define blood psi
Blood exerted against inner wall of BV and force keeps blood circulating as heart beats
The top value of the blood psi is
Systolic bp
the bottom value of blood psi is
diastolic bp
What is peripheral resistance
Friction blood encounter as flowing through BV
What if PR increases
Constriction. = atherosclerosis
Blood viscosity is
Blood thickness
What 7 factors can increase BP
age weight time excercise body position emotional state drugs
Name the 2 diseases related to temperature
Vasodilation/constriction.
lumen relaxed = BP lower / constrict BV = increased BP
Name the 4 step process of capillary exchange of gas + nutriensts
1) Direct difusion through membrane
2) Diffusion through intercellular cleft - b/c gaps of plasma not joined by tight junctions
3) Diffusion through pores - small solules allowed in by fenestrated capillaries. Oval pore covered by membrane
4) Transport via vesicles - lipid-insoluble substances enter/leave blood and pass plasma membrane of endothelial cell within vesicles
The lymphatic system controls____ fluid
returning
