Human Circulatory System Quiz

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What is the purpose of an artificial pacemaker?

To keep the heartbeat regular

Which chamber of the heart pumps deoxygenated blood to the lungs?

Right ventricle

Which blood vessel carries oxygenated blood away from the heart to the body?

Aorta

What is the role of the lungs in the circulatory system?

To oxygenate blood Signup and view all the answers

What is the function of the pacemaker cells in the heart?

To control the resting heart rate Signup and view all the answers

Why are strong acids more reactive than weak acids?

Due to higher H+ ion concentration Signup and view all the answers

What is the purpose of the muscle tissue in the heart walls?

To contract and pump blood Signup and view all the answers

Explain how an artificial pacemaker works in regulating the heartbeat.

It releases electrical impulses to stimulate heart contractions Signup and view all the answers

What happens when there is an imbalance between undissociated and dissociated acids?

It affects the rate of reaction Signup and view all the answers

What were Rutherford and Marsden trying to investigate in their alpha particle scattering experiments?

The structure of the atom Signup and view all the answers

Why were the alpha particles expected to either pass through or be slightly deflected in the gold foil according to the plum pudding model?

Because the positive charge was thought to be spread out throughout the atom like pudding. Signup and view all the answers

Describe the unexpected results that Rutherford and Marsden observed in their alpha particle scattering experiments.

Some alpha particles were deflected backwards and some were deflected more than expected. Signup and view all the answers

How did the unexpected results of the alpha particle scattering experiments challenge the plum pudding model of the atom?

The unexpected deflections indicated that the positive charge was concentrated in a small, dense nucleus. Signup and view all the answers

Explain the significance of Rutherford and Marsden's alpha particle scattering experiments in the history of atomic theory.

The experiments led to the discovery of the atomic nucleus and the revision of the plum pudding model. Signup and view all the answers

Human Circulatory System Quiz

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