UTEP KIN 4312 Exercise Physiology Chapter 7 Practice Quiz

Which of the following correctly identifies the two main divisions of the nervous system?

• Somatic and Autonomic Nervous Systems

• Central and Peripheral Nervous Systems

• Sympathetic and Parasympathetic Nervous Systems

• Brain and Spinal Cord

Which structures comprise the central nervous system (CNS)?

• Cranial nerves and spinal nerves

• Brain and spinal cord

• Autonomic and somatic nerves

• Sensory and motor pathways

Which part of the neuron carries the electrical impulse away from the cell body and may be covered by a myelin sheath?

• Dendrite

• Cell body (soma)

• Axon

• Synapse

A synapse can be best described as:

• A gap between Schwann cells along the axon

• The site where potassium channels are located

• The contact point between the axon of one neuron and the dendrite of another

• The region inside a neuron where ATP is produced

Which of the following statements is true regarding resting membrane potential in neurons?

• The inside of the cell is positively charged at rest

• The resting membrane potential is typically between -40 and -75 mV in neurons

• It does not require ion channels to maintain

• It remains unchanged by ionic currents

How does the sodium-potassium pump maintain resting membrane potential?

• By moving 2 Na+ out and 3 K+ in, using passive transport

• By moving 3 Na+ out and 2 K+ in, using ATP for energy

• By facilitating equal concentrations of Na+ and K+ on both sides of the membrane

• It does not require ATP to function

What is the primary function of the muscle spindle?

• To monitor tension developed in the muscle

• To respond to changes in muscle length (stretch)

• To serve as a motor neuron for muscle contraction

• To measure blood pressure changes

Where are Golgi tendon organs primarily located?

• Within the muscle belly

• Along the spinal cord

• In the tendons connecting muscle to bone

• On the surface of muscle fibers

Which of the following best describes the main function of a Golgi tendon organ (GTO)?

• To initiate muscle fiber contraction

• To measure the rate of change in muscle length

• To prevent muscle damage by reducing force generation when tension is excessive

• To protect joints from hyperextension

What does a motor unit consist of?

• A motor neuron and a bundle of dendrites

• Multiple interneurons in the spinal cord

• A motor neuron and the muscle fibers it innervates

• A single axon terminal and a single muscle fiber