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Chondriology Quiz Biology

Chondriology Quiz Biology

Because of its rigidity, tendon much of the time viably holds tubes open in the body. Cases join the rings of the trachea, for instance, the cricoid tendon and carina.

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This is a network of specialised cardiac muscle fibres that provide a path for each cycle of cardiac excitation to progress through the heart.

Pacemaker
Sinoatrial node
Purkinje fibres
Conduction system

This is the correct sequence of structures that allows the normal sequence of excitation to progress through the heart.

Bundle of His - Purkinje fibres - AV node
SA node - Purkinje fibres - AV node - Bundle of His
Purkinje fibres - AV node - SA node - Bundle of His
SA node - AV node - Bundle of His - Purkinje fibres

By comparison, cardiac muscle cells have _____________________ contraction plateau time than skeletal muscle cells.

A shorter
A longer
No difference in

This is the volume of blood ejected from the left ventricle into the aorta each minute.

Cardiac output
Cardiac input
Stroke volume
Heart rate

This term refers to the period of time during a cardiac cycle when contraction occurs and blood pressure rises.

Filling
Systole
Repolarization
Diastole

Which of these periods represents greatest cardiac output?

Atrial diastole
Ventricular diastole
Atrial systole
Ventricular systole

The second heart sound represents which of the below events?

Valvular stenosis
Semilunar valves opening
Atrioventricular valves closing
Semilunar valves closing

This part of the heart can initiate a contraction and can set a constant heart rate of about 100 beats per minute

Cardiac accelerator nerves
Chemoreceptors
Cardiovascular centre
Sinoatrial node

Stimulation of this nerve reduces heart rate.

Cardiac accelerator nerve
Medulla oblongata nerve
Vagus nerve
Phrenic nerve

Which of the below reduces heart rate?

Increased noradrenaline hormone
Increased thyroid hormone
Increased potassium levels
Increased calcium levels

This part of the brain regulates heart rate.

Cardiac accelerator nerves
Chemoreceptors
Medulla oblongata
Vagus nerve

The symbol Na+ represents a sodium atom that has lost an electron

True
False

Glycogen is a complex polysaccharide that is synthesized by the body

True
False

The movement of molecules through a membrane by filtration depends upon the presence of

Osmotic pressure
Hydrostatic pressure
Atmospheric pressure
None of the above

This electrical event represents repolarization of the ventricle.

R wave
T wave
S wave
P wave
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