Shared Flashcard Set

Details

Mammalian Physiology III
Circulation, Respiration, Hormones
29
Physiology
Undergraduate 3
03/30/2011

Additional Physiology Flashcards

 


 

Cards

Term

Stroke volume equation

SV=EDV-ESV

Definition

Stroke volume = end diastolic volume - end systolic volume

End diastolic volume = volume of blood before squeezing begins

End systolic volume = volume of blood at the end of systole

Term
Cardiac output equation
Definition
CO=HRxSV
Term
mammalian myocardium is supplied by ...
Definition
coronary vessels
Term
mammalian pacemaker cell
Definition
SA node
Term
phases of cardiac action potential
Definition

P0: rising phase (sodium channels open)

P1:short drop associated with closing of sodium channels

P2:plateau phase

P3: repolarization

P4: phase between action potentials

Term
2 groups of cells involved in cardiac action potential
Definition

working myocardium + conducting system

Nodal cells

Term
P wave
Definition
action potential moving through atrial muscle
Term
AV delay
Definition
small dip after P wave
Term
QRS complex
Definition
action potential moving through ventricular muscle
Term
ST interval
Definition
no signal (no voltage difference)
Term
T wave
Definition
repolarization of ventricular cells
Term
starling forces
Definition

capillary blood pressure (ultrafiltration)

plasma colloid osmotic pressure (reabsorption)

tissue fluid hydraulic pressure (reabsorption)

tissue colloid osmotic pressure (ultrafiltration)

Term
C=AP
Definition
free gas concentration in solution = P x absorption coefficient
Term
control of hormone synthesis
Definition

another hormone

neural input

peripheral activation

Term
3 classes of hormones
Definition

steroids

peptides

amines

Term
steroid hormones
Definition

-originate from cholesterol

-synthesized on demand, then escape by diffusion

bind to intracellular receptors

-HR complex acts as a transcription factor (response in minutes or hours)

-lipid-soluble

-may have non genomic effects

Term
peptide hormones
Definition

stored in vesicles until secreted

bind to cell-surface receptors

Term
amine hormones
Definition

-derived from tyrosine or tryptophan

-lipid-soluble or water-soluble

-oids travel using carrier proteins since they are not water soluble

Term
erythropoietin
Definition

-increases number of red blood cells

-made by the kidney

-produced when oxygen levels are low

-goes to bone marrow and induces production of hemoglobin and rbc

Term
Somatostatin
Definition

GHIH

growth hormone inhibiting hormone

Term
parathyroid hormone
Definition

"calcium, report to the plasma"

-negative feeback loop

-causes calcium to move out of bone and intestines into the plasma

causes renal reabsorption of calcium back into the blood

Term
calcitonin
Definition

"tone down that calcium"

reduces plasma calcium levels

Term
calcitriol
Definition

Vitamin D

"bring the calcium in"

produces a protein in the intestines that is helpful in transporting protein from intestines to blood

parathyroid hormone works on the intestines by increasing this

peripherally activated (produced by skin and modified by liver and kidneys)

Term
neurohypophysis
Definition

posterior pituitary

vasopressin and oxytocin (actions on smooth muscle)

triggered by neural input

Term
adenohypophysis
Definition

anterior pituitary

triggered by RH and IH from hypothalamus via hypothalamo-hypophysial portal system

Term
TSH controlled by
Definition
TRH
Term
ACTH controlled by
Definition
CRH
Term
GnRH controls
Definition
LH, FSH
Supporting users have an ad free experience!