LAB FINAL Flashcards
What is a urinometer?
Urine test tube that floats
What is a chemstix?
Urine test strip
2 instruments used for sensory tests?
Mallet and tuning fork
Negative feedback loop for ppCO2?
Stimulus: Increase in ppCO2
Sensor: Chemoreceptors in aortic arch/carotid sinus
Integrator: Medulla Oblongata
Effector: Diaphragm + external intercostal muscles
Response: Increase breathing rate and depth
Result: decrease ppCO2
Obstructive pulmonary disease:
If %FEV1 < 80%
Restrictive pulmonary disease:
When actual FVC < predicted FVC
What is the electrical pathway through the heart:
SA node AV node Bundle of HIS Rt bundle branch Lt bundle branch Rt purkinjee fiber Lt purkinjee fiber
P wave represents:
Atrial depolarization
QRS interval:
Ventricle depolarization
T wave:
Ventricle repolarization
When does atrial repolarization occur?
During QRS but you cannot see it
P wave ratio and normal amount:
1:1
normal= 0.11 sec
P-R interval normal amount:
0.12-0.20 sec
QRS interval normal amount:
0.04-0.1 sec
T wave normal amount:
0.04-0.08 sec
Smaller lumen:
Artery
Larger lumen:
Veins
Tunica Interna:
- innermost
- in direct contact with blood flow
- one layer of endothelial cells
Tunica Media:
- middle
- largely SMOOTH muscle
- allows constriction/dilation
- key regulator for blood flow
Tunica Adventitia/externa:
- outermost
- largely CONNECTIVE tissue
- acts as anchor
Anterior pituitary releases:
–Thyroid stimulating hormone (TSH) –Adrenocorticotropic hormone (ACTH) –Follicle stimulating hormone (FSH) –Luteinizing hormone (LH) –Prolactin (PRL) –Growth hormone (GH)
Posterior pituitary releases:
–Antidiuretic hormone (ADH)
–Oxytocin
Function of sarcomere:
Contains contractile proteins (actin and myosin) that causes muscle to shorten when they interact
Function of intercalated discs:
- Specific to cardiac
- Holds cells together