What is the muscular layer of the heart wall?
A) epicardium
B) myocardium
C) fibrous pericardium
D) endocardium
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Question 2) The thalamus, hypothalamus, and epithalamus collectively constitute the ________.
A) cerebellum
B) diencephalon interbrain
C) brain stem
D) cerebrum
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Question 3) The pointed, inferior portion of the heart, known as the ________, rests on the diaphragm and is oriented toward the left hip.
A) base
B) mediastinum
C) apex
D) pericardium
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Question 4) What reflexes stimulate skeletal muscles?
A) somatic
B) pupillary
C) autonomic
D) salivary
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Question 5) The partition where the bundle branches are located is called the ________.
A) left atrioventricular groove
B) interatrial septum
C) interventricular septum
D) right atrioventricular groove
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Question 6) During repolarization, what ions are pumped out of the cell?
A) sodium
B) potassium
C) both sodium and potassium
D) calcium
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Question 7) The layer of the heart wall that receives the stimulus from letter E is called the ________.
A) pericardium
B) epicardium
C) endocardium
D) myocardium
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Question 8) What type of neuron connects sensory and motor neurons in neural pathways?
A) interneurons (association neurons)
B) afferent neurons
C) efferent neurons
D) bipolar neurons
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Question 9) Myelinated fibers (tracts) form ________ matter while unmyelinated fibers form ________ matter.
A) sensory; motor
B) gray; white
C) motor; sensory
D) white; gray
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Question 10) What are the major positive ions situated outside the neuron when it is polarized?
A) calcium ions
B) sodium ions
C) potassium ions
D) magnesium ions
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