27 october 2008
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27 October 2008. Lab This Week: Frog Muscle II: Testing a Hypothesis based on Isometric twitch contractions Reminder: Bring textbook to lab Run t-test in SPSS Ready to write Abstract (see assignment) Finish Ch 10 Control of Body Movement Begin Ch12 Cardiovascular Physiology. Fig. 10.07. - PowerPoint PPT PresentationTRANSCRIPT
27 October 2008Lab This Week: Frog Muscle II: Testing a Hypothesis based on Isometric twitch contractions
Reminder: Bring textbook to labRun t-test in SPSSReady to write Abstract (see assignment)
Finish Ch 10 Control of Body MovementBegin Ch12 Cardiovascular Physiology
Fig. 10.07Senses (transduces) muscle tension
Golgi tendon organs oppose excessive muscle tension.
Not monosynaptic!
Fig. 10.01Initiates motor command
Fig. 10.02
Fig. 10.10a
Fig. 10.11
Somatotopy
Fig. 10.12Pyramidal tract
Extra-Pyramidal tracts
Not monosynaptic!
Rubrospinal,Reticulospinal,Vestibulospinal tracts
Corticospinal tractCorticobulbar tract
Movement Disorders
Huntington’s chorea
Parkinsonism
Ballism and hemiballism Cerebellar disorder
Ch 12 Cardiovascular Physiology
6 sections p. 359-4392 CV labs:
1 Frog heart, 1 Human EKG and Blood Pressure
Circulatory System Circulates• Nutrients: glucose, amino acids, fatty acids, ketones, etc• Wastes:• Hormones: bound & free• 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)
Figure 12.01Blood volume ~ 5 liters
Serum = plasma – clotting factors
Formed elements
Components……
Blood doping & erythropoietin (hormone that stimulates erythrocyte production in bone marrow) to increase hematocrit
Entering and Exiting the blood
Discontinuous capillaries in bone marrow, spleen, & liver permit erythrocytes to enter and exit blood.
Hct = percentage of blood volume occupied by RBCs
Anemia
The Scoop on Tissie
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!
When left heart can’t pump all the blood it receives from pulmonary circuit (due to high aortic pressure and/or damage to left ventricle) blood accumulates in pulmonary circuit. This is congestive heart failure. Symptom: shortness of breath.
Figure 12.04
CO = 5L/minfor each circuit
Up to 35 L/min in strenuous exercise
What’s missing?
Microcirculation
Pulmonary circuit
Systemic Circuit
5 liters/min5 liters/min
Exchange Vessels
Resistance Vessels
Capacitance vessels