Nervous System Components and Divisions Quiz

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What are the two components of the central nervous system?

Cerebellum and thalamus

Brain and spinal cord (correct)

Dendrites and axons

Motor and sensory neurons

Into what two pathways can the peripheral nervous system be further divided?

Dendritic and axonal pathways

Sympathetic and parasympathetic pathways

Motor and sensory pathways

Somatic and autonomic pathways (correct)

What is the function of the myelin sheath?

To provide structural support to the neuron

To transmit electrical signals between neurons (correct)

To store energy for neuronal activities

To regulate neurotransmitter release

Differentiate between white matter and grey matter.

Grey matter contains cell bodies while white matter contains myelinated axons. Signup and view all the answers

What is a reflex arc?

A sequence of events that leads to an involuntary response to a stimulus. Signup and view all the answers

What is the threshold level?

The minimum level of depolarization required to trigger an action potential. Signup and view all the answers

During depolarization, what is happening at the axon membrane?

Potassium ions are entering the cell Signup and view all the answers

What occurs at the synapse?

Release of neurotransmitters Signup and view all the answers

What is acetylcholine?

A neurotransmitter Signup and view all the answers

What is the refractory period?

The period of time when a neuron cannot generate another action potential Signup and view all the answers

Name two positive feedback loops related to the female body.

Breast milk production and labor contractions Signup and view all the answers

Define steroid hormones and provide an example.

Hormones derived from cholesterol; estrogen Signup and view all the answers

What does the undersecretion of hGH lead to?

Dwarfism in children and osteoporosis in adults Signup and view all the answers

Which hormones regulate blood calcium levels?

Parathyroid hormone (PTH) and calcitonin Signup and view all the answers

What is the purpose of insulin, and what are its targets?

To decrease blood sugar levels; liver and muscles Signup and view all the answers

For which hormone is the stimulus LOW GRADE stress, injury, or exercise?

Adrenaline; produced by the adrenal cortex Signup and view all the answers

Nervous System Components and Divisions Quiz

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