EXAM 1 Flashcards
Which of the following statements is correct regarding diffusion.
The greater the concentration of gradient, the faster the rate of diffusion.
If cells are placed in a hyper-tonic solution containing a solute to which the membrane is impermeable, what could happen?
The cells will lose water and shrink.
Neuromuscular sings and symptoms of hypokalemia include.
Diminished deep tendon reflexes
The equilibrium potential of K+ ions in nerve cells is about -90 mV. The membrane potential of typical nerve cells at rest is -70 mV. Therefore
Increasing the permeability of a resting neuronal membrane to K+ will make membrane potential more negative inside with respect to outside.
Muscarinic receptors are proteins that bind the neurotransmitter:
Acetylcholine.
If there were no sodium leak channels, the resting membrane potential of a neuron would be:
More negative.
Exocytosis of neurotransmitter into the synaptic cleft is triggered by an influx of _____ in response to the arrival of an action potential in the axon terminal.
Ca2+
In the maintenance of the cell resting membrane potential ______.
extracellular sodium levels are high.
Which sympathetic pathway involves only a preganglionic axon going to the effector organ?
Adrenal medulla pathway.
Passive membrane transport processes include _____.
Movement of a substance down its concentration gradient
Signs and symptoms of hyponatremia include.
Changes in LOC, abdominal cramps and muscle twitching.
Which is TRUE about the Na+, K+ ATPase pump in neurons?
It generates a small electrical potential such that the inside is made negative with respect to the outside.
When accessing a CVAD
The paramedic should draw at least 5ml from the device prior to use.
The number 1 primary responsibility of base hospital is to.
Protect the public.
A three year old pt. in cardiac arrest (Medical Directive)
Will receive 0.16 mg of EPI 1:10000 initial IV dose
Will receive 1.6. mg of EPI 1:1000 initial ETT dose.
