AP&P Quiz #6 (Nervous System PT2)

Based on the taskmaster

What is grey matter?

“Processing center” - Thinking and moving happens here

What is white matter?

Wiring for the brain - Connects different parts of the brain

What is the function and location of the ascending tract?

Function: Carries SENSORY info from your BODY to your BRAIN

Location: Inside the white matter (back and sides)

What is the function and location of the descending tract?

Function: Sends signals from BRAIN to MUSCLES

Location: Inside white matter (front and sides)

What structures make up a reflex arc?

• Receptor

• Sensory Neuron

• Interneuron

• Motor Neuron

• Effector

In what order do the nerve impulses travel for reflex arcs?

• Receptor

• Sensory Neuron

• Interneuron

• Motor Neuron

• Effector

How many neurons are involved in a reflex arc?

3 are typically involved:

• Sensory

• Interneuron

• Motor neuron

What is a sensory receptor?

Detect any of the following:

• Touch

• Light

• Sound

• Taste

• Smell

• Movement

What is a thermoreceptor?

Detects temperature changes in the body

What is a Nociceptor?

A sensory receptor that detects pain

What is a Mechanoreceptor?

A sensory receptor that detects touch, pressure, stretching, or vibration

What is a Photoreceptor?

A sensory receptor in your eyes that detects light

What is a Proprioceptor?

A sensory receptor in your muscles, tendons, and joints that detects position, movement, and balance

What is an Effector?

Carries out action based on instructions sent from brain/spinal cord

What is a Dermatome?

Map of your skin that shows which nerve roots are responsible for feeling sensation

What is a Sensory Adaption?

When your bodies sensors get used to a constant stimulus and stop sending signals to your brain

What is Proprioception?

Your 6th sense that allows you to unconsciously know where your body parts are and how they’re moving

What is a Threshold Stimulus?

The smallest amount of energy needed to make a muscle/nerve react

What is Equilibrium?

Your body’s ability to stay balanced and steady

What structures are responsible for Equilibrium?

1. Inner Ear

2. Eyes

3. Propiroceptors

4. Brain

What is a Muscle Spindle Cell?

A tiny sensor inside your muscles that detects how much it’s stretched or lengthened

What reaction do Muscle Spindle Cells trigger?

Stretch reflex (contracts muscle)

What is a Golgi Tendon Organ?

A tiny sensor where your muscle meets tendon that detects tension

Where reaction does the Golgi Tendon Organs trigger?

Tendon reflex (relaxes muscle)

How is CSF produced?

CSF is created in tiny blood vessels called the choroid plexus, which are are found in the ventricles of your brain

What is the function of CSF?

• Protects your brain/spinal cord

• Removes waste products

• Provides nutrients

• Helps float the brain

• Maintains pressure keeping it stable

What are 3 layers of meninges?

• Dura Mater (Outer layer)

• Arachnoid Mater (Middle layer)

• Pia Mater (Soft inner layer)

What layer of meninges contains CSF?

• Arachnoid Mater (Middle layer)