Pre-lecture Flashcards
What is Atrial natriuretic peptide?
A Polypeptide hormone that causes VASODILATION
what is the apical membrane?
The surface of the plasma membrane that faces the LUMEN
What are Baroreflexes?
A negative feedback system which buffers short term changes in blood pressure
What is ECF?
Extracellular fluid is ALL body fluids outside of cells
E.g. Plasma
What is glomerular filtration rate?
The volume of fluid filled from the renal glomerular capillaries into the Bowman’s capsule per unit time
Define homeostasis
The body’s ability to physiologically regulate its inner environment to ensure its stability in response to fluctuations in the outside environment and the weather
What is ICF?
Intracellular fluid is all body fluid inside of cells
What is the membrane potential?
The difference in voltage or electrical potential difference between the interior and exterior of a cell
What is osmolality?
Th number of osmoles per kg
What is osmolarity
The number of osmoles per litre of solution
What is an osmole?
1 gram molecular weight of solute
What is osmotic pressure?
The pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane
What is the parasympathetic nervous system?
Part of the nervous system that serves to
- slow heart rate
- increase intestinal and gland activity
- relax sphincter muscles
Together with sympathetic nervous system constitutes the autonomic nervous system (involuntary)
What is the sympathetic nervous system?
The part of the nervous system that serves to:
- accelerate the heart rate,
- constrict blood vessels
- raise blood pressure
Along with parasympathetic nervous system, constitute the autonomic nervous system responsible for involuntary functions
What is TONICITY?
A measure of the osmotic pressure of two solutions separated by a semipermeable membrane.
