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