Nervous and Sensory System

Question 1

The nervous system is made up of ______ and ____.

Answer 1

Neurons and glia

Question 2

Specialized cells that can receive and transmit chemical or electrical signals.

Answer 2

Neurons

Question 3

Cells that provide support functions for the neurons by playing an information processing role that is complementary to neurons.

Answer 3

Glia

Question 4

Are bundles of nervous tissue, often containing hundreds to thousands of axons wrapped in connective tissue.

Answer 4

Nerves

Question 5

Nerves are bundles of nervous tissue, often containing hundreds to thousands of _____ wrapped in connective tissue.

Answer 5

Axons

Question 6

______ in the peripheral nervous system (PNS) carry information to and from neurons in the central nervous system (CNS), where information is integrated and processed.

Answer 6

Nerves

Question 7

The Central Nervous System consists of the _____ and the ______ ____.

Answer 7

Brain and Spinal Cord

Question 8

A structure that processes information, composed of inter-connected neurons and glial cells.

Answer 8

Nerves

Question 9

A structure that transmits information, consisting of a thick bundle of nerve tissue that carries information about the body to the brain and from the brain to the body.

Answer 9

Spinal Cord

Question 10

Collects information and sends commands, containing nerves that extend to and from the spinal cord.

Answer 10

Peripheral Nervous System

Question 11

PNS is divided into ________ ______ and ________ ______.

Answer 11

Afferent Nerves and Efferent Nerves

Question 12

Collect sensory information from the body and transmit it to the CNS.

Answer 12

Afferent Nerves

Question 13

Are also sometimes called sensory nerves.

Answer 13

Afferent Nerves

Question 14

Carry commands from the CNS to the body.

Answer 14

Efferent Nerves

Question 15

Are also sometimes called motor nerves.

Answer 15

Efferent Nerves

Question 16

What are the 3 different classes of neurons that make up the nervous system?

Answer 16

Afferent Neurons, Efferent Neurons, and Interneurons

Question 17

Get information about what’s going on inside and outside of the body and bring that information into the CNS so it can be processed.

Answer 17

Afferent Neurons

Question 18

Get information from other neurons and convey commands to your muscles, organs and glands.

Answer 18

Efferent Neurons

Question 19

Only found in the CNS. Connects one neuron to another. They receive information from other neurons and transmit information to other neurons.

Answer 19

Interneurons

Question 20

It controls and coordinates all essential functions of the body including all other body systems allowing the body to maintain homeostasis or its delicate balance.

Answer 20

Nervous System

Question 21

Processes the information in the brain and spine, communication and coordination.

Answer 21

Integration Function

Question 22

Sends information to the muscles, glands, and organs so they can respond appropriately.

Answer 22

Motor Function

Question 23

Basic functional cell of nervous system. Transmits impulses (up to 250 mph).

Answer 23

Neuron

Question 24

Receive stimulus and carries impulses toward the cell body.

Answer 24

Dendrites

Question 25

Nucleus & most of cytoplasm.

Answer 25

Cell Body

Question 26

Fiber which carries impulses away from cell body.

Answer 26

Axon

Question 27

Cells which produce myelin or fat layer in the PNS.

Answer 27

Schwann Cells

Question 28

Dense lipid layer which insulates the axon (makes the axon look gray).

Answer 28

Myelin Sheath

Question 29

Gaps or nodes in the myelin sheath.

Answer 29

Node of Ranvier

Question 30

Bring messages to CNS, to brain and spinal cord.

Answer 30

Sensory/Afferent Neurons

Question 31

Carry messages from CNS, from brain and spinal cord to body.

Answer 31

Motor/Efferent Neurons

Question 32

Between sensory & motor neurons in the CNS (both).

Answer 32

Interneurons

Question 33

Protected by vertebrae at the dorsal (back of heart and gut).

Answer 33

Spinal Cord

Question 34

Transmits sensory and motor signals between the CNS and the rest of the body.

Answer 34

Peripheral Nervous System

Question 35

Vertebrae begun as (3 parts).

Answer 35

-Prosencephalon (forebrain) -Mesencephalon (midbrain) -Rhombencephalon (hindbrain)

Question 36

Their nervous systems have different degrees of centralization, cephalization, and specialization.

Answer 36

Invertebrates

Question 37

They have a simple nerve net.

Answer 37

Cnidarians

Question 38

They have an epidermal nerve net.

Answer 38

Echinodermata

Question 39

They are composed of longitudinal nerve cords.

Answer 39

Platyhelminthes

Question 40

They have the most developed nervous system among all invertebrates.

Answer 40

Cephalopod Mollusks

Question 41

They have segmental ganglia.

Answer 41

Arthropods

Question 42

They have nerve ring.

Answer 42

Nematoda

Question 43

They do not have true nervous system but there is oscula.

Answer 43

Porifera