Nervous System

The peripheral nervous system includes all ....

• 31 joints, 12 tendons

• 31 spinal nerves, 12 cranial nerves

• 31 cranial nerves, 12 spinal nerves

• 31 tendons, 12 joints

Heart rate, glandular action, and contraction of stomach are all examples of the autonomic nervous system because....

• they include the nerves

• they're involuntary function

• they're voluntary actions

• they regulate for homeostasis

Dendrites: conducts impulses __ cell body of neuron

Answer explanation

Axon- conduct impulses ____ from cell body

Answer explanation

Sensory Neurons __ 1. Send impulses to muscles and glands

Motor Neurons __ 2. Send impulses from sensory and motor

Interneurons __ 3. Send impulsed to brain and spinal cord

• 1, 2, 3

• 3, 2, 1

• 3, 1, 2

• 2, 3, 1

Oligodendroglia __ 1. phagocytosis

Astrocytes __ 2. form myelin sheath from axon in CNS

Microglia __. 3. star cells, connect with small blood vessels to neuron

• 1, 2, 3

• 3, 2, 1

• 2, 3, 1

• 3, 1, 2

Answer explanation

Which one has myelinated and unmyelinated fibers

• Gray Matter-Myelinated

• White Matter-Myelinated

• White Matter-Unmyelinated

• Gray Matter-Unmyelinated

Answer explanation

Knee-Jerk Response:

Stimulus→Nerve Impulse→ _____ neuron→dorsal root ______→interneuron→_____ neuron→_______→chemical signals→organ→signal in effect

Answer explanation

What is the first stage called when the inside of the cell is negative, at -70mV?

• Resting Stage

• Depolarization

• Repolarization

• Action Potential

Answer explanation

In what stage do the channels open?

• Resting Stage

• Depolarization

• Action Potential

• Repolarization

Answer explanation