Cardiovascular System in Human Physiology

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Questions and Answers

Which part of the cardiovascular system mainly depends on pressure gradient for blood flow?

  • Pulmonary capillaries
  • Large arteries
  • Arterioles (correct)
  • Venules

The electrical conduction pathway in the heart goes from the SA node to the ventricular myocardium through which of the following?

  • Right & left bundle branches
  • His bundle
  • AV node
  • Purkinje network (correct)

Which of the following is responsible for recording the electrical activity in the frontal plane in an electrocardiogram?

  • Lead I (correct)
  • Lead II
  • Lead III
  • Wilson's central terminal

Which part of the heart has the highest intrinsic pacemaker rate?

<p>Right atrium (A)</p> Signup and view all the answers

In the limb lead system for electrocardiogram, where is the negative electrode placed for lead III?

<p>Left leg (LL) (A)</p> Signup and view all the answers

What is responsible for conducting signals from the AV node to the right and left bundle branches in the heart?

<p>His bundle (D)</p> Signup and view all the answers

Which part of the cardiovascular system acts as a pressure storer?

<p>Aorta (B)</p> Signup and view all the answers

Where is Wilson's central terminal located in the body for recording chest leads in an electrocardiogram?

<p>Midline between V2 &amp; V4 (D)</p> Signup and view all the answers

What is responsible for conducting signals from atrial myocardium to the AV node in the heart?

<p>His bundle (D)</p> Signup and view all the answers

In which part of the cardiovascular system does blood mainly depend on atrial contraction to move to ventricles?

<p>Pulmonary vein (B)</p> Signup and view all the answers

In an electrocardiogram, which lead records the electrical activity in both frontal and horizontal planes?

<p>Wilson's central terminal (D)</p> Signup and view all the answers

What is responsible for conducting signals from atrial myocardium to AV node and then to bundle branches in the heart?

<p>Nodal tissue (C)</p> Signup and view all the answers

Which part of the brain is associated with personality and behavior changes after injury?

<p>Prefrontal cortex (B)</p> Signup and view all the answers

Which part of the brain is primarily responsible for issues with attention, focus, and behavior in children with ADHD?

<p>Prefrontal cortex (A)</p> Signup and view all the answers

Which neurotransmitter is predominantly found in the neocortex?

<p>Dopamine (A)</p> Signup and view all the answers

Which layer of the neocortex is an important origin of cortical efferent fibers targeting thalamic nuclei?

<p>Layer IV (D)</p> Signup and view all the answers

Which type of cortical fibers provides input to the thalamus from the cortex?

<p>Corticothalamic afferent fiber (D)</p> Signup and view all the answers

Which cells in the neocortex make important contributions to EEG through their reciprocal interconnections?

<p>Pyramidal cells in layer V (B)</p> Signup and view all the answers

What is responsible for detecting the electrical field generated by large groups of distant neurons in the brain?

<p>Electroencephalogram (EEG) (C)</p> Signup and view all the answers

On which part of the body would electrodes be placed to perform an Electrocorticogram (ECoG)?

<p>Brain surface (D)</p> Signup and view all the answers

Which part of the brain is responsible for recording neural electrical activity using Electroencephalogram (EEG)?

<p>Frontal lobe (D)</p> Signup and view all the answers

What type of cells make up approximately 75% of the neocortex?

<p>Pyramidal cells (A)</p> Signup and view all the answers

What is the main function of the prefrontal cortex?

<p>Controlling personality, attention, and motivation (A)</p> Signup and view all the answers

Which area of the brain is responsible for language comprehension and speech production?

<p>Temporal lobe (A)</p> Signup and view all the answers

What happens when there is a lesion in Wernike’s area of the brain?

<p>Aphasia and impaired understanding of language (B)</p> Signup and view all the answers

Which part of the brain is primarily involved in visual processing and perception?

<p>Occipital lobe (B)</p> Signup and view all the answers

What is the main function of the limbic system in the brain?

<p>Regulate autonomic nervous system (D)</p> Signup and view all the answers

What is the primary function of the frontal eye field in the brain?

<p>Assist in eye movements (B)</p> Signup and view all the answers

Which part of the brain is crucial for hearing processing and perception?

<p>Temporal lobe (D)</p> Signup and view all the answers

What role does the hippocampal formation play in the brain?

<p>Learning and memory (A)</p> Signup and view all the answers

What function does Broca’s area serve in the brain?

<p>Generating speech (A)</p> Signup and view all the answers

What is damaged when there is a lesion in Wernicke’s area of the brain?

<p>Difficulty in language comprehension (D)</p> Signup and view all the answers

How does a lesion in Broca’s area affect an individual?

<p>Impaired speech production (A)</p> Signup and view all the answers

What is the main function of the hippocampal formation?

<p>Maintaining learning and memory (C)</p> Signup and view all the answers

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