Tyson Family Lecture on the Preservation and Restoration of Southern Ecosystems

Thursday, Nov. 1, 7 p.m.

Olin Teaching Theater, Franklin W. Olin BuildingRhett Johnson, founder and president emeritus of the Longleaf Alliance, which is dedicated to the conservation of longleaf pine ecosystems, will talk about his efforts in the movement to restore longleaf pine back to its native Southeastern range. The program is the first of Wofford’s Tyson Family Lecture on the Preservation and Restoration of Southern Ecosystems. It is presented by Wofford’s  Environmental Studies Program. 

Rhett Johnson, Director of the Longleaf Alliance

1QQ for 8:30 31OctWrite each letter and circle the letter of correct statements.

a) Corticobulbar tracts control movements of the face.

b) Huntington’s chorea is characterized by involuntary purposeless jerky movements and is associated with disruptions in cerebellar function.

c) Muscle spindle afferents monitor skeletal muscle tension.

d) Gamma motoneurons cause extrafusal myofibers to contract.

e) In the patellar stretch reflex, motoneurons for antagonistic muscles would be inhibited.

1QQ #22 for 10:30Write each letter and circle the letter of correct statements.

a) Corticobulbar tracts control movements of the distal extremities.

b) Huntington’s chorea is characterized by involuntary purposeless jerky movements and is associated with disruptions in cerebellar function.

c) Muscle spindle afferents monitor skeletal muscle tension.

d) Gamma motoneurons cause extrafusal myofibers to contract.

e) In the patellar stretch reflex, motoneurons for antagonistic muscles would be inhibited.

1QQ#22 for 11:30Write each letter and circle the letter of correct statements.

a) Corticobulbar tracts control movements of the distal extremities.

b) Deficits in the ability to point to a spot on a map may indicate a disruption in cerebellar function.

c) Muscle spindle afferents monitor skeletal muscle stretch.

d) Alpha motoneurons cause intrafusal myofibers to contract.

e) In the crossed-extensor reflex, motoneurons for flexor muscles in the contralateral leg would be inhibited.

31 October 12Begin Ch 12

Cardiovascular Physiology

6 sections p. 353-433

2 CV labs: 1 Frog heart,

1 Human EKG and Blood Pressure

Was there ever a time when you didn’t have a heart?

When did you get a heart?Why did you need a heart?

What does the Circulatory System Circulate?

S 2

Nutrients, water and gases that enter. Substances that move from cell to cell. Wastes that must be eliminated to the outside.

What if the heart stops beating?

5-10 seconds of zero blood flow to brain = loss of consciousness (hypoxia)5-10 minutes = permanent brain damage

What does the Circulatory System Circulate?

• Water and ions• Nutrients: glucose, fatty acids, ketones, nucleic acids, amino acids• Wastes• Signaling molecules: hormones and cytokines• Security cells and molecules: leukocytes and antibodies

• Gases: CO2 and O2

• Formed Elements: Cells and Cell Fragments– Erythrocytes, Leukocytes, Thrombocytes = Platelets

Other roles of the Cardiovascular System

Thermoregulation

Blood Clotting

Reproduction (ex: penile erection)

S 2

S S 1

Filtration

Secretion

Reabsorption

Fig. 12.02Arteries..away from heart

Veins..return to heart

Regional blood flow determined by arteries and arterioles.

Resting Cardiac Output = 5L/min for each side!

S 4

Red = highly oxygenated bloodBlue = blood with less oxygen.

What’s missing?

Microcirculation

Pulmonary circuit

Systemic Circuit

CO = 5 liters/minCO = 5 liters/min

Exchange Vessels

Resistance Vessels

Capacitance vessels

S 6

Portal Systemshave a modified sequence of vessels.

Arterial Blood Pressure

Hypothalamo-hypophyseal portal system

Hepatic portal system

What makes blood move (flow)?

A Pressure Gradient

Where is the pressure the highest?Where is the pressure the lowest?What creates the pressure?

Flow = Q = ∆P

What deters flows?Resistance

R = 8Lη/πr4

R = 8Lη/πr4

Smooth muscles determine radius

F=Q=ΔP/RFlow = Pressure gradient/Resistance

from Ohm’s Law (V=IR)

R = 8Lη/πr4

Q= ΔP πr4

8LηPoiseulle’s equation

S 8

Double radius … 16x flow

Half radius….1/16th flow

R = 8Lη/πr4