nervous system

Question 1

divisions of the nervous system

the nervous system can be divided into 2 parts

Answer 1

central nervous system (CNS)

peripheral nervous system (PNS)

Question 2

divisions of the nervous system

the central nervous system (CNS) consists of

Answer 2

brain
spinal cord

acts as the central command for all communication and actions of the body

Question 3

divisions of the nervous system

the peripheral nervous system (PNS) includes

Answer 3

all of the nerves that branch out to the rest of the body and ganglia

it allows signals sent by the brain to reach their target destination in the body

Question 4

structure and function of the neuron

what comprises the nervous system

Answer 4

neurons or nerve cells

Question 5

structure and function of the neuron

nerves are long bundles of

Answer 5

neuronal axons that transmit signals from the central nervous system (CNS)

Question 6

structure and function of the neuron

the signals that are transmitted by nerves start as

Answer 6

graded electrical impulses generated at the dendrites of neurons

Question 7

structure and function of the neuron

if strong enough the impulse that is transmitted by the nerves travels along the

Answer 7

axon and causes chemical neurotransmitters to be secreted from the axon terminals into the synapse

Question 8

structure and function of the neuron

in the synapse these neurotransmitters will bind to either

Answer 8

another neuron or a muscle cell

Question 9

structure and function of the neuron

neurons send and receive

Answer 9

signals in the nervous system

Question 10

structure and function of the neuron

sensory (afferent) neurons send

Answer 10

messages to the central nervous system (CNS) about sensory information such as touch, smell, pain

Question 11

structure and function of the neuron

motor (efferent) neurons send

Answer 11

messages to muscle and can be subdivided into the autonomic (involuntary) motor nervous system and the somatic (voluntary) nervous system

Question 12

structure and function of the neuron

autonomic nervous system controls

Answer 12

involuntary actions involving cardiac and smooth muscle such as
* heart rhythm
* digestion
* breathing

Question 13

structure and function of the neuron

somatic nervous system controls

Answer 13

voluntary actions involving skeletal muscle such as deliberate actions like
* walking
* throwing
* typing

for this to happen the nerves need to control muscles

Question 14

structure and function of the neuron

each muscle fiber is connected to a

Answer 14

nerve fiber

Question 15

structure and function of the neuron

for the entire muscle to move it takes a concerted effort by

Answer 15

many nerves and muscle fibers and the use of adenosine triphosphate (ATP) to power the contraction

Question 16

practice problems

which of the following actions are controlled by voluntary nerve signals?

a. walking
b. digestion
c. talking
d. heart beating
e. breathing

Answer 16

a. walking
c. talking

Question 17

practice problems

which of the following best describes the function of a nerve synapse?

a. it carries a nerve impulse away from the nerve body
b. it is responsible for involuntary muscle movements
c. it allows for the passing of signals between neurons and other neurons or between neurons and muscles
d. it contains a bundle of fibers that transmit eletrical impulses

Answer 17

c. it allows for the passing of signals between neurons and other neurons or between neurons and muscles

Question 18

practice problems

which of the following describes the role of the central nervous system (CNS)?

a. it transmits electrical signals to muscles
b. it transmits sensory information
c. it controls the regulation of body systems
d. it sends messages from the body to the spinal cord

Answer 18

c. it controls the regulation of body systems

Question 19

practice problems

which of the following types of nerves sends messages to the brain?

a. skeletal
b. smooth
c. sensory
d. motor

Answer 19

c. sensory