Human Body 1

Question 1

Impulses

Answer 1

Messages carried by the nervous system

Question 2

Threshold of a neuron

Answer 2

The minimal level of a stimulus that is required to activate a neuron

Question 3

Resting Potential

Answer 3

The electrical charge across the cell membrane of a neuron in it’s resting state

Question 4

Action Potential

Answer 4

Reversal of charges from negative to positive

Question 5

Neurotransmitters

Answer 5

Sent across the synapses of a neuron and another cell

Question 6

What makes up the central nervous system?

Answer 6

The brain and the spinal cord

Question 7

What makes up the peripheral nervous system?

Answer 7

All nerves and cells associated cells that are not apart of the brain or spinal cord

Question 8

Somatic division of a nervous system

Answer 8

Regulates voluntary movements

Question 9

Automatic divisions of the nervous system

Answer 9

Regulates involuntary actions

Question 10

Sensory division of the nervous system

Answer 10

Transmits impulses from sense organs to the central nervous system

Question 11

Motor divisions of the nervous system

Answer 11

Transmits impulses from the central nervous system to the muscles or glands

Question 12

Rods

Answer 12

Extremely sensitive to light (eye)

Question 13

Cones

Answer 13

• Less sensitive to light that rods

- Respond to light of different colors producing color vision

Question 14

Semicircular Canals

Answer 14

Sense organ that helps with balance and can make you feel dizzy (ear)

Question 15

Tendons

Answer 15

Muscle to bone

Question 16

Liagments

Answer 16

Bone to bone (holds bones together)

Question 17

Main functions of the skin

Answer 17

• Protects against infections and injuries
• Regulate body temperature
• Provides UV protection
• Removes waste products

Question 18

Neuron

Answer 18

Cells that transport impuleses

Question 19

Feedback Inhibition

Answer 19

The process in which a stimulus produces a response that opposes the original stimulus. “Heating system”

Question 20

Axon

Answer 20

The long fiber that carries impulses away from the cell body (neuron)

Question 21

Myelin Sheath

Answer 21

Insulating membrane that surrounds the axon

Question 22

Brain stem

Answer 22

Connects the brain and spinal cord

Question 23

Cerebellum

Answer 23

Located at the back of the skull, second largest region in the brain

Question 24

Cerebrum

Answer 24

Responsible for voluntary actions and is the site of intelligence

Question 25

Thalamus

Answer 25

Receives messages from all of the sensory receptors throughout the body and then transports them to the cerebrum

Question 26

Hypothalamus

Answer 26

Control center for recognition of hunger, thirst, fatigue, anger and body temperature

Question 27

Ossification

Answer 27

Bone formation when cartilage is replaced by bone

Question 28

Myosin and Actin

Answer 28

Protein used in muscle contraction

Question 29

Neuromuscular junction

Answer 29

Point of contact between a motor neuron and a skeletal muscle cell