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General Zoology (Lec) > Nervous and Sensory System > Flashcards

Nervous and Sensory System Flashcards

1
Q

The nervous system is made up of ______ and ____.

A

Neurons and glia

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2
Q

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

A

Neurons

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3
Q

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

A

Glia

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4
Q

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

A

Nerves

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5
Q

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

A

Axons

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6
Q

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

A

Nerves

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7
Q

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

A

Brain and Spinal Cord

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8
Q

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

A

Nerves

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9
Q

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.

A

Spinal Cord

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10
Q

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

A

Peripheral Nervous System

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11
Q

PNS is divided into ________ ______ and ________ ______.

A

Afferent Nerves and Efferent Nerves

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12
Q

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

A

Afferent Nerves

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13
Q

Are also sometimes called sensory nerves.

A

Afferent Nerves

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14
Q

Carry commands from the CNS to the body.

A

Efferent Nerves

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15
Q

Are also sometimes called motor nerves.

A

Efferent Nerves

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16
Q

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

A

Afferent Neurons, Efferent Neurons, and Interneurons

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17
Q

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.

A

Afferent Neurons

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18
Q

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

A

Efferent Neurons

19
Q

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

A

Interneurons

20
Q

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.

A

Nervous System

21
Q

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

A

Integration Function

22
Q

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

A

Motor Function

23
Q

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

A

Neuron

24
Q

Receive stimulus and carries impulses toward the cell body.

A

Dendrites

25
Q

Nucleus & most of cytoplasm.

A

Cell Body

26
Q

Fiber which carries impulses away from cell body.

A

Axon

27
Q

Cells which produce myelin or fat layer in the PNS.

A

Schwann Cells

28
Q

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

A

Myelin Sheath

29
Q

Gaps or nodes in the myelin sheath.

A

Node of Ranvier

30
Q

Bring messages to CNS, to brain and spinal cord.

A

Sensory/Afferent Neurons

31
Q

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

A

Motor/Efferent Neurons

32
Q

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

A

Interneurons

33
Q

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

A

Spinal Cord

34
Q

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

A

Peripheral Nervous System

35
Q

Vertebrae begun as (3 parts).

A

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

36
Q

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

A

Invertebrates

37
Q

They have a simple nerve net.

A

Cnidarians

38
Q

They have an epidermal nerve net.

A

Echinodermata

39
Q

They are composed of longitudinal nerve cords.

A

Platyhelminthes

40
Q

They have the most developed nervous system among all invertebrates.

A

Cephalopod Mollusks

41
Q

They have segmental ganglia.

A

Arthropods

42
Q

They have nerve ring.

A

Nematoda

43
Q

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

A

Porifera

General Zoology (Lec) (18 decks)

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