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Ninth Grade (Grade 9) Nervous and Endocrine Systems Questions

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Grade 9 Nervous and Endocrine Systems
Light can enter your eye through the
  1. pupil.
  2. lens.
  3. cornea.
  4. retina.
Grade 9 Nervous and Endocrine Systems
What are receptors?
  1. special cells that detect stimuli
  2. glands that produce hormones
  3. the spaces between two neurons
  4. the nerve pathways operating in a reflex action
Grade 9 Nervous and Endocrine Systems
What is an axon?
  1. the lower half of the brain stem
  2. the insulating layer that covers a neuron
  3. an electrical message carried by a nerve cell
  4. a nerve fiber that sends nerve impulses away from the cell body
Grade 9 Nervous and Endocrine Systems
What is a stimulus?
  1. the electrical message carried by a nerve cell
  2. a quick, automatic action that protects the body from danger
  3. any factor that stimulates a receptor and brings about a response
  4. nerve cells that carry messages from cells in the sense organs to the CNS
Grade 9 Nervous and Endocrine Systems
What is the part of ear that has three bones that amplify sound waves?
  1. inner
  2. middle
  3. outer
Grade 9 Nervous and Endocrine Systems
Which sequence best describes the pathway of a reflex arc?
  1. receptor - motor neuron - spinal cord - sensory neuron - effector
  2. receptor - sensory neuron - spinal cord - motor neuron - effector
  3. effector - motor neuron - brain - sensory neuron - receptor
  4. effector - motor neuron - spinal cord - sensory neuron - sensor
Grade 9 Nervous and Endocrine Systems
The branches from the cell body that receive messages from other neurons are called
  1. axons.
  2. dendrites.
  3. effectors.
  4. motor neurons.
Grade 9 Nervous and Endocrine Systems
Electrical impulses from the eye are sent through the                 to the brain.
  1. auditory nerve
  2. optic nerve
  3. cochlear nerve
  4. last nerve
Grade 9 Nervous and Endocrine Systems
A system that is able to maintain a constant body temperature is
  1. ectothermic.
  2. endothermic.
  3. exothermic.
  4. sympathetic.
Grade 9 Nervous and Endocrine Systems
What tubeless organs or groups of cells secrete hormones directly into the bloodstream?
  1. pineal gland
  2. endocrine glands
  3. hypothalamus
  4. ovaries
Grade 9 Nervous and Endocrine Systems
The space between two neurons is the
  1. stimulus.
  2. synapse.
  3. receptor.
  4. neurotransmitter.
Grade 9 Nervous and Endocrine Systems
What part of the eye thickens when adjusting to the distance of an object?
  1. pupil
  2. cornea
  3. lens
  4. cones
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