physiology chapter 12 Nervous System

Which term describes a bundle of axons in the peripheral nervous system?

• Ganglion

• Tract

• Nerve

• Nucleus

Which structure predominates in the white matter of the brain

• Nuclei

• Myelinated axons

• Ganglia

• Neuron cell bodies

What ion enters a neuron causing depolarization of the call membrane?

• Potassium

• Calcium

• Chloride

• Sodium

Which part of a neuron transmits an electrical signal to a target cell?

• Mitochondira

• Soma

• Dendrites

• Axon

Which of the following neurotransmitters is associated with inhibition exclusively?

• Glutimate

• ACh

• GABA

• NE

Voltage gated Na+ channels open upon reaching what state?

• Resting potential

• Threshold potential

• Repolarization

• Overshoot

Which of the following substances is least able to cross the blood-brain barrier?

• Sodium

• Glucose

• White blood cells

• Water

What type of glial cells provide myelin for the axons in a tract?

• Schwann cells

• Microglial

• Oligodendrocytes

• Astrocytes

What neurotransmitter is st the neuromuscular junction?

• Glutimate

• Acetylcholine

• Serotonin

• Epinepherine

Which functional division of the nervous system would be responsible for the physiological changes seen during exercise (eg increased heart rate and sweating)?

• Enteric

• Somatic

• Autonomic

• Central