CH.4 Nervous System

Question 1

What is the nervous system?

Answer 1

A conglomeration of billions of cells specifically designed to provide a communication network within the human body.

Question 2

What is the central nervous system?

Answer 2

The division of the nervous system comprising the brain and the spinal cord.

Question 3

What is the central nervous system’s primary function?

Answer 3

It’s primary function is to coordinate activity of all parts of the body.

Question 4

What is motor control?

Answer 4

How the central nervous system integrates Inernal an external sensory information with previous experiences to produce a motor response.

Question 5

What is motor learning?

Answer 5

The integration of motor control processes with practice or experience that leads to relatively permanent changes in the body’s capacity to produce skilled movements

Ex. Shooting hoops over and over

Question 6

What is Motor development?

Answer 6

They change the motor skill behaviour over time throughout the lifespan.

Question 7

What is structural efficiency?

Answer 7

The structural alignment of the muscular and skeletal systems that allows the body to maintain balance in relation to its centre of gravity.

Question 8

What is the neuron?

Answer 8

The functional unit of the nervous system.

Question 9

Where are motor control, motor learning and motor development produced?

Answer 9

The brain.

Question 10

How many neurons make up the nervous system?

Answer 10

Approximately 1 billion

Question 11

What are the three main parts of a neuron?

Answer 11

The cell body, an axon and dendrites.

Question 12

Sensory receptors Recognize environmental stimuli including…

Answer 12

Mechanoreceptors  touch/position
Thermoreceptors    Temperature 
Nociceptors              Pain
Chemoreceptors      Taste/smell
Photoreceptors         Light

Question 13

What are Efferent neurons?

Answer 13

Nerve impulses that move away from the brain and spinal cord. They stimulate muscle contraction which is why they are also referred to as motor neurons (They create movement)

Question 14

What is dendrite?

Answer 14

The portion of the neuron that is responsible for gathering information from other structures?

Question 15

What is a cell body of a neuron? What parts make it up?

Answer 15

The portion of the neuron that contains the nucleus, lysosomes, mitochondria and golgi complex.

Question 16

What does an axon do?

Answer 16

A cylindrical projection from the cell body that transmit nerve impulses to other neurons or effector sites.

Question 17

What are nerve impulses?

Answer 17

The consecutive linking of neurons by electro chemical signals that travel through the nerve fibre.

Question 18

What are mechanoreceptors?

Answer 18

Specialized sensory receptors respond to deformation of body tissues. Deformation simply refers to a change in position of the receptor which generates a nerve impulse. Mechanoreceptors can be stimulated in response to touch, pressure, stretch, and motion.

Question 19

What are muscle spindles?

Answer 19

Small mechanoreceptors Found in the belly of skeletal muscles that measure the amount and rate of stretch. When the muscle is lengthened too much or too quickly the muscle spindle sends afferent impulses to the central nervous system.

Question 20

What are Afferent neurons?

Answer 20

Nerve impulses that move towards the spinal cord and brain from the periphery of the body and are sensory nature.

Question 21

What are efferent neuron’s?

Answer 21

Motor neurons that send a message for muscles to contract.

Question 22

What are interneurons?

Answer 22

Only located within the spinal cord and brain. Receive impulses from afferent neurons and conduct back out to provide a motor response.

Question 23

What are golgi tendon organs?

Answer 23

Receptors sensitive to the change in tension of the Muscle, and the rate of that change.

Question 24

What are joint receptors?

Answer 24

Receptors in and around a joint that respond to pressure, acceleration, and deceleration of the joint.