Neuroscience and Cardiovascular Physiology Quiz

What is the functional unit of the nervous system?

• Neuron

• Axon

• Synaptic knobs

• Soma

What is the resting membrane potential during rest?

• 0 mv

• -90 mv

• -70 mv

• +30 mv

What type of nerve fibers are characterized by a myelin sheath?

• Unmyelinated fibers

• Myelinated fibers

• Sensory fibers

• Motor fibers

What is the first ionic change during action potential?

• Hyperpolarization

• Exit of K+

• Repolarization

• Entry of Na+

What is the role of acetylcholine in neuromuscular transmission?

• To inhibit muscle contraction

• To initiate muscle contraction

• To decrease heart rate

• To increase heart rate

What is the primary function of the atrioventricular valves?

• Prevent backflow of blood

• Facilitate blood flow to lungs

• Increase heart rate

• Regulate blood pressure

What is the phase of action potential characterized by a plateau?

• Phase 2

• Phase 1

• Phase 0

• Phase 3

What is the effect of sympathetic stimulation on heart rate?

• Increases heart rate

• Decreases heart rate

• Has no effect

• Causes arrhythmia

What is the primary ion involved in cardiac contractility?

• Chloride (Cl-)

• Calcium (Ca++)

• Sodium (Na+)

• Potassium (K+)

What is the measurement of arterial blood pressure primarily used for?

• Assessing cardiovascular health

• Measuring lung capacity

• Determining metabolic rate

• Evaluating muscle strength