Nervous System

Question 1

Cranial Cavity

Answer 1

The space inside the skull

Question 2

Cerebrum

Answer 2

Part of the brain that manages voluntary activity, memory, thinking, and reasoning

Question 3

Cerebellum

Answer 3

Part of the brain that manages balance, motor functions, and coordination

Question 4

Medulla

Answer 4

Part of the brain that is responsible for involuntary activities, such as breathing, heartbeat, blood pressure, and peristalasis (movement of food through the digestive tract)

Question 5

Central Nervous System

Answer 5

Brain and spinal cord

Question 6

Nervous System

Answer 6

Controls functions of the body, made of neurons

Question 7

Cell body

Answer 7

Contains the nucleus and most of the cytoplasm

Question 8

Nucleus

Answer 8

Contains genetic material that directs cellular activity

Question 9

Dentrites

Answer 9

Short branch extensions off the cell body that detect impulses and carry them toward the cell body

Question 10

Axon

Answer 10

Long fiber that carries impulses away from the cell body

Question 11

Nodes of Ranvier

Answer 11

gaps between Schwann cells (Myelin sheath) where the impulse jumps from node to node along the axon

Question 12

Schwann Cells

Answer 12

Makeup the Myelin sheath

Question 13

Myelin Sheath

Answer 13

Insulating membrane that surrounds the axon

Question 14

Terminal Branches

Answer 14

End of the nerve cell, send messages out into the synapse (the space between neurons)

Question 15

Synaptic Knobs

Answer 15

Release neurotransmitters into the synapse to send signal from one neuron to the next

Question 16

Neurotransmitter

Answer 16

Chemicals released from the synaptic knobs that carry a neuron’s message across the synapse to another neuron

Question 17

Sensory Neuron

Answer 17

Neurons in the eyes, skin, nose, etc. that detect changes in your environment, and transmit messages to the brain or directly to the spinal cord via interneurons

Question 18

Interneurons

Answer 18

Neurons that relay messages between sensory and motor neurons. They’re located in the spinal cord and the brain

Question 19

Motor Neurons

Answer 19

Neurons that are responsible for controlling muscles and glands (effectors)

Question 20

Effectors

Answer 20

Muscles and Glands controlled by motor neurons

Question 21

Reflexive Arc

Answer 21

sensory neuron –> interneuron (in the spinal cord) –> motor neuron. Provides a very fast path to get your body out of danger