Control Of BP&BV Part 2 Flashcards
B 2 adrenergic receptors vaso______
Dilation
________ of arterioles in the coronary circulation and in skeletal muscles is in “fear, flight, or fight” situations
Dilation
M_ receptors are:
1) all cardiac muscle cells and sympathetic nerve endings at ventricular muscle cells
2) powerfully slow the cardiac pacemakers, slow cell-to-cell propagation of APs, and increases refractory period
2
Most parasympathetic neurons in the ventricles release their ACh onto __________ neuron terminals rather than directly onto ventricular muscles
Sympathetic
By decreasing HR and opposing sympathetic effects on ventricular contractility, parasympathetic activation can _________ cardiac output
Decrease
M_
1) smooth muscles and endothelial cells of arteries and arterioles
3
For skeletal muscles, only some species have M_ receptors that are innervated by special sympathetic cholinergic neurons, which are activated specifically in anticipation of “flight or fight or fear”
3
The arterial ___________ reflux regulates arterial blood pressure
Baroreceptor
What is: the arterial baroreceptors send afferent impulses to the CNS which reflexively alters cardiac output and vascular resistance to keep blood pressure at a set point?
Arterial baroreceptor reflex
What arterial baroreceptor have their afferents in the carotid sinus nerves, which joint the glossopharyngeal nerve?
Carotid sinus baroreceptor
What arterial baroreceptor:
The afferent neurons from the aortic arch baroreceptors join the vagus nerve? Some species call it aortic depressor nerve?
Aortic arch baroreceptor
Each arterial pressure pulse causes APs to be generated in baroreceptor ________ neurons
Afferent
With every ______ ejection from heart, blood distends the aorta and arteries which causes baroreceptors to initiate neural impulses (APs)
Systolic
What are sensitive to the rate of change of pressure and mean arterial pressure?
Baroreceptors
The higher the mean arterial pressure (MAP), the ____ APs are formed in each heartbeat.
More
