Neurons
What is the purpose of the sensory neurons?
Respond to light, sound, and touch, and send information to the brain.
Which of the following best describes the role of sodium and potassium in the nervous system?
They help power the body like a battery, allowing electrical messages to be sent efficiently.
They regulate the heart rate and digestion in the body.
They help the body absorb nutrients from food.
They control the production of hormones in the brain.
1 They help power the body like a battery, allowing electrical messages to be sent efficiently.
14. Which part of the peripheral nervous system (PNS) is responsible for actions when your body is resting?
Sympathetic nervous system
Parasympathetic nervous system
Somatic nervous system
2 Parasympathetic nervous system
What is the purpose of motor neurons?
carry signals from the brain to your muscles and glands to move
10. What is the best example of a polar neuron
The inside and outside of the neuron has a negative charge
The inside and the outside of the neuron has a positive charge
The inside of the neuron is negative and the outside is positive
3 The inside of the neuron is negative and the outside is positive
15. Which part of the motor division in the nervous system is responsible for movement that you do not actively control such as breathing?
Somatic nervous system
Autonomic nervous system
2 Autonomic nervous system
What is an example of the anatomy of neurons?
Axons are shaped like a long thread
Motor neurons help with movement
Sensory neurons detect light, sound, or touch
Interneurons help electrical messages travel from the brain to other parts of the body
1. Axons are shaped like a long thread
What is the purpose of the sodium-potassium pump?
To put the potassium and sodium back where they belong
What are the three organs of the nervous system and what are they responsible for doing?
Brain -processes information
Spinal Cord - connection between nerves and the brain
Nerves - send and receive messages
9.Which part of the neuron is responsible for receiving the electrical message once it’s traveled across the synapse?
Axon terminal
Dendrite
Myelin Sheath
Cell body
2 Dendrite
12. Explain what happens during depolarization
Sodium enters the neuron and switches the inside from negative to positive
Explain how neurotransmitters work
First, an electrical impulse is sent to the neuron. When this happens, this causes the vesicles containing neurotransmitters to release them. The neurotransmitter then travels from the axon terminal, through the synapse (the space between neurons) and then attaches to the receptor of the dendrite (the part of the neuron that receives a message).
What is the correct physiology of a neurotransmitter?
To help send electrical messages across a synapse
Which statement best describes the resting potential charge (natural state) of a neuron?
The inside and outside are both positively charged
The inside and outside of a neuron is negatively charged
The inside of a neuron is negatively charged and the outside is positively charged
The inside of a neuron is positively charged and the outside is negatively charged
3 The inside of a neuron is negatively charged and the outside is positively charged
Explain how reflexes work
Step 1: Sensory neurons detect stimulus (change)
Step 2: The sensory neuron starts an action potential (through depolarization) that sends the electrical message to the spinal cord.
Step 3: The electrical message continues to be sent until it reaches the motor neurons (responsible for movement).
Step 4: The message continues to travel through motor neurons until it reaches the muscle needed for reflex
Step 5: The motor neuron releases a substance called acetylcholine, which is responsible for making the muscle contract (squeeze) and your reflex is engaged.