focus question #13 and online

nerves, ganglia, sensory receptors, and enteric plexuses.

6. What are the components of the PNS?

skeletal

(blank) muscle is excited by the somatic division of the nervous system

Central Nervous System and Peripheral Nervous System

1. Which classification of the nervous system is broken into the Central Nervous System and the Peripheral Nervous System?

Smooth muscle, cardiac muscle, and glands

10.What type(s) of muscle is excited by the autonomic motor division?

axon

11. What part of the neuron conducts the impulse away from the cell body?

A myelin is a segmented sheath of fatty tissue that serves to increase the speed of the nerve impulse.

13. What is the function of myelin?

saltatory conduction occurs in myelinated fibers and is much faster, whereas continuous conduction occurs in unmyelinated fibers and it is much slower.

14. What is the difference between saltatory and continuous conduction?

The afferent division is responsible for carrying information towards the brain, and it is also called the sensory division as it picks up information from the environment and takes that information to the brain The efferent division, also called the motor division, is responsible for carrying information out and away from the brain, and is also further divided into 2 parts based on whether the information coming from the brain is under voluntary or involuntary control.

15. What is the difference between the efferent division and the afferent division of the nervous system?

A chemical message occurs through the synapse between two neurons.

16. The message through a neuron is electrical. What type of message occurs through the synapse between two neurons?

the brain and the spinal cord.

2. What are the components of the CNS?

neurons, dendrites, a cell body, an axon, and an axon terminal.

3. What is a nerve composed of?

aggregations of neuron cell bodies in the PNS.

4. Define ganglia.

cranial and peripheral nerves

5. What anatomical division of the nervous system include cranial and peripheral nerves?

Afferent division

7. What functional division of the nervous system involves sensory input?

The Sympathetic division causes an increase in heart rate when under stress.

8.You are walking to your car late at night in an empty parking lot and hear footsteps quickly approaching from behind. What functional division of the nervous system causes your heart rate to increase and the hair on the back of your neck stand up?

nerve

A is a bundle of neurons.

neuron

A nerve cell is known as a neuron neuroglia glial cell nucleus

ganglia

An aggregation of neuron cell bodies is known as

synapse

The space between two neurons is called a

spinal cord

The two components of the CNS are the brain and

axon

What part of the neuron carries the impulse away from the cell body? terminal bouton axon myelin sheath dendrites

dendrites

What part of the neuron picks up an impulse? axon terminal dendrites cell body axon

brain

Which of the following is NOT a component of the Peripheral Nervous System (PNS)? Sensory Receptors Ganglia Brain Spinal Nerves Cranial Nerves

A neuron

17. What is a cell of the nervous system called if it conducts a current?

Skeletal muscle tissue

9. What type of muscle is excited (innervated) by the somatic motor division?

Peripheral nervous system

What anatomical division of the nervous system do cranial nerves belong to? Efferent Division Afferent Division Central Nervous System Peripheral Nervous System

motor

What does efferent mean?

afferent division

What functional division of the nervous system is also known as the sensory division?

A synapse is a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

What is a synapse?

skeletal muscle

Which of the following is not innervated by autonomic motor neurons of the autonomic motor division? glands skeletal muscle smooth muscle cardiac muscle