Lab This Week: EKGs and Blood Pressure

• Bring textbook• Bring calculator• Wear clothes and shoes for running stairs• Easy access to wrist and ankles for ECG

electrodes• Easy access to arms for Blood Pressure

measurement• Wear Wofford logo if you wanna be in Olencki pics

Revising Abstracts

Instructions forthcoming.Due date to be announced.Keep all papers together for resubmission!

For Friday Quiz• Be prepared to draw and label

electrocardiograms for– Normal– 1st degree heart block– 2nd degree heart block

• Be able to diagnose from an ECG– Atrial fibrillation– Ventricular fibrillation– Premature ventricular systole– 3rd degree heart block

1QQ#26 for 10:30a) Catecholamines acting on beta-adrenergic

receptors cause arteriolar smooth muscles to relax.

b) Vasopressin is a vasoconstrictor.c) Of the several modes of exchange in capillaries,

diffusion is the most important for the delivery of nutrients and removal of wastes.

d) There are five Starling forces.e) For bulk flow, water and colloids move through

aqueous channels and intracellular clefts.e) Was not graded. I intended the term to be intercellular clefts and I didn’t do a good job of making a distinction.

1QQ#26 for 11:30a) Catecholamines acting on alpha-adrenergic receptors

cause arteriolar smooth muscles to relax.b) Endothelin-1 is a vasoconstrictor.c) Of the several modes of exchange in capillaries, bulk

flow is the most important for the delivery of nutrients and removal of wastes.

d) There are only three Starling forces.e) During bulk flow in capillaries, water and crystalloids

move through aqueous channels and intracellular clefts.

e) Was not graded. I intended the term to be intercellular clefts and I didn’t do a good job of making a distinction.

Figure 12.42

Main difference in the Pulmonary circuit?

Net filtration = 4L/day

Bulk Flow through aqueous channels and intracellular clefts

Regulated by arterioles

Starling Forces

S 10

Bulk Flow and Starling Forces

Who Cares?Aunt Esther

Cancer of the liver;Failure of hepatocytes to produce plasma colloids

S 12

Pc

∏c

Aunt Ester

Actions of Histamine and antihistamines

Pc

∏c

Hypotension

Fig. 12.43

Pc

Pc

Pc

S 11

Figure 12.47

Liver &Bone Marrow

& Spleen

Fate of 4 L/d excess filtrate

S 1

Mode of propulsion?

Filariasis in Haiti: Washington Post Article

Figure 12.44Veins are

Capacitance vessels(high compliance)

with valves for unidirectional flow

Arteries are low compliance,

so any increase in volume increases

pressure.

S 2

Fig. 12.53

MAP = CO x TPR

Negative feedback control:stimulus, receptors, afferent pathway(s), integrator, efferent pathway(s), effector(s)response(s)

S 3

Fig. 12.54

S 4

What happens to the set point for MAP during exercise?

Story Time

A Neuroscientist in New Orleans

S 5

MAP = CO x TPR

Mean Arterial Pressure = Cardiac Output x Total Peripheral Resistance

MAP = (HR x SV) x TPR

S 2

Creating your Hemorrhage Diagram

Loss of 1 liter of blood from vein → ↓ blood volume → ↓ MAP → …..

 Beginning with a loss of about 1 liter of blood from a vein, diagram the early events associated with hemorrhage and the negative feedback responses to hemorrhage in a well-organized diagram. Write legibly! Completeness, accuracy, and detail, together with the proper sequence earn maximal points.  The following abbreviations can be used: AI, AII, JGA, mAChR, Hct, Q, SV, EF, RBC, HR, EDV, ACh, ANH, ADH, CO, TPR, EPO, VR, MAP, EPI, NE, SAN, aAdR , bAdR, Symp (sympathetic), Parasymp (parasympathetic), PV, r (radius), Pc, fAP (frequency of action potentials.) Any other abbreviations must be defined. "If in doubt, write it out!" Use single headed arrows (→) to indicate sequential relationships and doubled-stemmed arrows to indicate increases or decreases.