CO and MAP Smartbook
The volume of blood ejected by the ventricles per minute is the ______________ , ______________.
Blank 1: cardiac Blank 2: output
An increase in peripheral resistance will ____________ blood pressure.
Blank 1: increase, raise, or elevate
Select all that apply What variables are kept in homeostatic ranges through extrinsic regulation of the heart?
Blood chemistry and Blood pressure
Which autonomic system(s) innervate(s) the heart?
Both sympathetic and parasympathetic nerves
What is the volume of blood ejected by the ventricles per minute called?
Cardiac output
Select all that apply List the factors that determine mean arterial pressure.
Cardiac output, Stroke volume, Peripheral resistance, and Heart rate
Select all that apply Baroreceptor information reaches the cardioregulatory center primarily through what two cranial nerves?
Glossopharyngeal and Vagus
How does stimulation by the sympathetic nervous system increase stroke volume?
Increases contractility
An increase in stimulation by what branch of the nervous system lowers the heart rate?
Parasympathetic
The amount of tension in the ventricular myocardium immediately before it begins to contract is called what?
Preload
Cardiac output is equal to which of the following?
SV x HR
Mean arterial pressure can be calculated by ______.
cardiac output (CO) X peripheral resistance (PR)
A decrease in blood pressure may be a result of a(n) ______ in cardiac output.
decrease
A decrease in peripheral resistance will _____ blood pressure.
decrease
A decrease in venous return to the heart leads to a(n) ______ in preload, and therefore, a(n) ______ in stroke volume.
decrease, decrease
Blood pressure, blood pH, and blood carbon dioxide levels are controlled by ______ regulation.
extrinsic
Regulation of the heart that involves neural or hormonal control is called ___________ regulation.
extrinsic
Peripheral resistance _____ the flow of blood.
impedes
As cardiac output increases, blood pressure will ______.
increase
An increase in venous return to the heart leads to a(n) ______ in preload and therefore a(n) ______ in stroke volume.
increase, increase
When mechanisms within the heart regulate cardiac output, it is referred to as _____ regulation.
intrinsic
By definition, mean arterial pressure is ______.
less than the average of systolic and diastolic pressures
Cardiac output (CO) times peripheral resistance (PR) is equal to ______.
mean arterial pressure
Heart rate, stroke volume, cardiac output, and peripheral resistance all influence ______.
mean arterial pressure
The ______ is slightly less than the average of systolic and diastolic pressures.
mean arterial pressure
The vagus nerve conveys signals from the ______ nervous system to the heart.
parasympathetic
As blood flows through vessels, it encounters forces, caused by several factors, that impede its movement. This opposition to blood flow is called peripheral ___________.
resistance
An increase in contractility caused by the sympathetic stimulation will result in increased ______.
stroke volume
Heart rate will increase when the SA node is stimulated by the _______________ division of the ANS.
sympathetic
Stimulation of the SA node by the ______ nervous system raises the heart rate.
sympathetic
The cardiac nerves convey signals from the ______ nervous system to the heart.
sympathetic
Preload is _____.
the amount of tension on ventricular walls before contraction
Select all that apply Extrinsic regulation of the heart requires involvement of ______.
the nervous system and hormones
Cardiac output is equal to stroke volume ______ heart rate.
times
Afferent sensory information from the arterial baroreceptors is transmitted through the glossopharyngeal and _____________ nerves to a cardioregulatory area of the medulla oblongata.
vagus
The ___________ nerve conveys parasympathetic signals to the heart.
vagus
Intrinsic regulation of cardiac output results from mechanisms ______ the heart.
within
