Nervous System Test 24

Spinal injuries can cause loss of sensation and paralysis (loss of ability to move) in the legs. (Inter)neurons in the spinal cord carry messages between the brain and the legs. If the spinal cord is damaged, sensory messages will not be able to go to the brain and the “movement” messages may not get to the muscles in the legs. So the person won’t be able to feel or move her legs

• True
• False

Your lips are more sensitive to touch than your forehead. What is different about the touch receptive fields in the lips compared to the forehead?

• a There are more touch receptive fields in the lips.
• ❍ B The touch receptive fields are bigger in the lips.
• ❍ C The touch receptive fields are more sensitive in the lips.
• ❍ D The touch receptive fields are used more often in the lips.

Study the image below. Write the name of each structure. a)

Study the image below. Write the name of each structure. b)

Study the image below. Write the name of each structure. c)

Study the image below. Write the name of each structure. d)

If an arrow was to be draw on the image below that indicates the direction a neural message is transmitted, which direction would the arrow point?

• To the left
• To the right

Neurotransmission has both electric and chemical components. The alveoli carries an electric message along a neuron, to the end of the axon. At the axon, the electric message stimulates chemicals called neurotransmitters to cross the gap, and the electric message continues along the next neuron.

• True
• False

A person who is paralyzed can use an electronic device implanted in the brain to control robotic hands. How is that possible?

• Neural messages are electric impulses that can stimulate brain. The brain can send a signal through the device to move a robotic hand.
• It is not possible. This is technology that has not been developed.
• Neural messages are chemical impulses that can stimulate brain. The brain can send a signal through the device to move a robotic hand.

You have an experience that causes a complex network of neurons to be built in your brain. This network is most likely a _____.

• ❍ a receptive field
• ❍ B disease
• ❍ C memory
• ❍ D motor pathway