Neuromuscular system

Question 1

What does the CNS consist of?

Answer 1

Brain & spinal cord

Question 2

What is the peripheral nervous system?

Answer 2

Network of spinal nerves to and from the spinal cord in the body

Question 3

Afferent neurons

Answer 3

Sensory neurons that carry signal from stimuli to the CNS

Question 4

Efferent neurons

Answer 4

Motor neurons that carry signal from CNS to muscles

Question 5

Somatic nerves

Answer 5

Voluntary movement

Question 6

Autonomic/ visceral nerves

Answer 6

Involuntary movement

Question 7

Neurons

Answer 7

Cell that conducts electrical nerve impulse

Question 8

Name the order of neuron cell parts that an electrical impulse flows

Answer 8

Dendrites, cell body, axon, axon terminals

Question 9

Synapse

Answer 9

Gap between that neuro signal passes to other neurons, muscles, or glands

Question 10

Nerves

Answer 10

Bundles of nerve fibers

Question 11

Which nerve bundle has both afferent and efferent fibers?

Answer 11

Spinal

Question 12

Myofibril

Answer 12

Contractile muscle filaments made of a strand of sacromeres

Question 13

Actin

Answer 13

Thiner contractile muscle filament; moves past myosin during contraction

Question 14

Myosin

Answer 14

Thicker stationary muscle filament

Question 15

Sacromere

Answer 15

Contracting unit of a muscle; a section of myofibril

Question 16

Muscle fascicle

Answer 16

a bundle of muscle fibers

Question 17

Contraction

Answer 17

When the sacromere shortens of a muscle shortens; uses ATP; actin and myosin filaments slide past each other, but stay the same length

Question 18

What is amyotrophic lateral sclerosis (ALS) aka Lou Gehrig’s disease

Answer 18

Motor neurons degenerate leading to loss of voluntary movement

Question 19

What is muscular dystrophy?

Answer 19

Abnormal genes prevent the protein that makes muscles causing muscles to weaken. Both voluntary and involuntary muscles are compromised.