WorksheetsTopic 4A
Total questions: 38
Worksheet time: 25mins
What letters are used to label the parts of an ECG?
What do the letters ECG stand for?
The Vena Cava delivers blood to the heart into the.....
left atrium
right atrium
left ventricle
right ventricle
Where is the SAN found?
(a)
Where do motor neurons carry impulses to?
receptors
CNS
effectors
The SAN is one node in the heart, which is the other (abbreviation only)?
(a)
The heart will beat faster if there are more impulses travelling down which nerve to the SAN?
parasympathetic
sympathetic
Which type of receptors detect changes in blood pressure?
baroreceptors
thermoreceptors
chemoreceptors
What is the correct order of electrical activity during a cardiac cycle?
AVN -> SAN -> Bundle of His -> Purkinje fibres
SAN -> AVN -> Bundle of His -> Purkinje fibres
AVN -> Purkinje fibres -> SAN -> Bundle of His
SAN -> Bundle of His -> AVN -> Purkinje fibres
Chemoreceptors in the carotid bodies are triggered by
oxygen concentration
Na+ concentration
blood pH
blood glucose concentration
The ____ acts as the heart's pacemaker.
AVN
Bundle of His
cardiac myogenic tissue
SAN
Sensory input from the baroreceptors in the aorta is fed to the ______ in the brain.
Cerebellum
Cerebrum
Hypothalamus
Medulla oblongata
In addition to increased heart rate, an increased concentration of CO2 will lead to...
a decrease in blood pressure
an increase in respiratory rate
a decrease in respiratory rate
an increase in salivation
Why doesn't the SAN send the entire heart contracting at the same time? [2]
The Purkinje fibres prevent the contraction of ventricular walls
Chambers that are not stretched are unable to contract
Non-conducting tissue prevents immediate contraction of ventricles
The AVN delays the impulse, allowing the ventricles to fill
The heart controls its own resting heart rate. True or false?
True
False
Which key term is used to describe the fact that the action potentials that control resting heart rate originate at the SAN in the heart muscle?
sarcogenic
myogenesis
myogenic
sarcogenesis
What is the name of the receptors that detect change in blood pH?
Baroreceptors
Chemoreceptors
pH receptors
chemicalreceptors
What part of the brain receives signals regarding changing breathing rate?
Cardiac control centre
Respiratory control centre
Breathing control centre
Hypothalamus
Definition: "The volume of air
breathed in and out
with each breath"
Breathing rate
Tidal Volume
Inspiratory Reserve Volume
Vital Capacity
Which of the following describes regular breathing, at rest
ER - expiratory reserve
IR - inspiratory reserve
TV - Tidal Volume
VC - Vital capacity
TLC - total lung capacity
What value represents the extra air you can blow out, while doing maximum in and out breathing, in addition to a normal breathe?
ER - expiratory reserve
IR - inspiratory reserve
TV - Tidal Volume
VC - vital capacity
TLC - total lung capacity
What value represents the total amount of air breathed in and out, while doing maximum in and out breathing.
ER - expiratory reserve
IR - inspiratory reserve
TV - Tidal Volume
VC - vital capacity
TLC - total lung capacity
Which term describes the maximum lung volume, which includes all the air you can breathe in and out, as well as the residual volume (extra capacity of the lungs not being used)
ER - expiratory reserve
IR - inspiratory reserve
TV - Tidal Volume
VC - vital capacity
TLC - total lung capacity
What is the primary purpose of spirometry traces?
To assess dental health
To diagnose skin conditions
To measure lung function and diagnose respiratory conditions
To measure blood pressure
What is number 2?
vital capacity
Tidal volume
Expiratory reserve volume
Residual volume
The air that remains after forcably breathing everything out of the lungs is the
(a)
