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Grade 10 Nervous and Endocrine Systems
Grade 12 Skin, Skeleton, and Muscles
The mechanism responsible for the size principle is
  1. larger motor neurons that contain the greatest number of muscle cells reach threshold easier than smaller neurons.
  2. larger sympathetic neurons that contain the greatest number of muscle cells reach threshold easier than smaller neurons.
  3. smaller sympathetic neurons that contain the least number of muscle cells reach threshold easier than larger neurons.
  4. smaller motor neurons that contain the least number of muscle cells reach threshold easier than larger neurons.
  5. smaller motor neurons that contain the greatest number of muscle cells reach threshold easier than larger neurons.
College Nervous and Endocrine Systems
Which of these describes lower motor neurons?
  1. Neurons that branch out from spinal cord to the muscles
  2. Neurons in the legs and feet
  3. Neurons leading from the lower body to the brain
  4. None of the above
Grade 10 Nervous and Endocrine Systems
The diagram shows the major parts of a neuron.
Neuron
Which best describes the function of part E?
  1. contains genetic material
  2. moves impulses away from cell body
  3. fatty substance that speeds up action potentials
  4. receives information and transmits it to the cell body
Grade 10 Nervous and Endocrine Systems
The diagram shows the major parts of a neuron.
Neuron
Which best describes the function of part F?
  1. end of the axon and contains neurotransmitters
  2. fatty substance that speeds up action potentials
  3. receives information and transmits it to the cell body
  4. contains the nucleus and produces proteins for dendrites
Grade 9 Nervous and Endocrine Systems
The space between two neurons is the
  1. stimulus.
  2. synapse.
  3. receptor.
  4. neurotransmitter.
Grade 7 Nervous and Endocrine Systems
Grade 9 Nervous and Endocrine Systems
Grade 11 Skin, Skeleton, and Muscles
A single skeletal muscle cell is a muscle
  1. spasm.
  2. neuron.
  3. contraction.
  4. fiber.
College Nervous and Endocrine Systems
Grade 6 Nervous and Endocrine Systems
Grade 7 Nervous and Endocrine Systems
The most important cells in the nervous system are
  1. neurons.
  2. axons.
  3. neurotransmitters.
  4. synapses.
Grade 6 Nervous and Endocrine Systems
What are nerve cells called?
  1. synapses
  2. lobes
  3. dendrites
  4. neurons
Grade 12 Skin, Skeleton, and Muscles
Grade 10 Nervous and Endocrine Systems
The diagram shows the major parts of a neuron.
Neuron
Which best describes the function of part B?
  1. end of the axon and contains neurotransmitters
  2. fatty substance that speeds up action potentials
  3. receives information and transmits it to the cell body
  4. contains the nucleus and produces proteins for dendrites
Grade 10 Nervous and Endocrine Systems
The diagram shows the major parts of a neuron.
Neuron
Which best describes the function of part C?
  1. contains genetic material
  2. moves impulses away from cell body
  3. fatty substance that speeds up action potentials
  4. receives information and transmits it to the cell body
Grade 10 Nervous and Endocrine Systems
The diagram shows the major parts of a neuron.
Neuron
Which best describes the function of part D?
  1. contains genetic material
  2. moves impulses away from cell body
  3. fatty substance that speeds up action potentials
  4. receives information and transmits it to the cell body
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