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College Biology Questions

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College Nervous and Endocrine Systems
A drug that causes potassium to leak out of a neuron, increasing the positive charge on the outside, would                                                          .
  1. cause the cell to release its neurotransmitter
  2. speed up nerve signals traveling the length of the cell
  3. inhibit transmission of nerve signals by the neuron
  4. make it easier to trigger action potentials in the neuron
College Nervous and Endocrine Systems
Threshold potential is of great significance in the physiology of neurons because if threshold is not reached,                                                                                                   .
  1. the action potential will be "inversed", with a flux of sodium out of the cell rather than into it
  2. the neuron cannot regain its resting potential
  3. positive-feedback depolarization will not occur
  4. an action potential will be triggered
College Nervous and Endocrine Systems
What do we mean by action potential?
  1. a sudden reversal of the sodium-potassium pump
  2. a sudden increase in speed by the sodium-potassium pump
  3. a traveling wave of depolarization in the neuron membrane
  4. a brief neutralization of the charges on sodium and potassium ions
College Nervous and Endocrine Systems
Action potentials are generated along a neuron because                                                                                                                   .
  1. of cytoplasmic streaming within the neuron
  2. the neuron cytoskeleton conducts electricity as long as an ion gradient is maintained by the sodium-potassium pump
  3. they are pulled along by positive-negative attraction
  4. depolarization of the membrane at one point causes an increase in permeability to sodium at the next point
College Nervous and Endocrine Systems
How are neurons structurally adapted to chemically transmit impulses to neighboring neurons?
  1. They have Schwann cells that surround axons.
  2. They have numerous nodes of Ranvier.
  3. They have numerous dendrites.
  4. Axon terminals contain neurotransmitter with synaptic vessicles.
College Nervous and Endocrine Systems
What is the difference between a neuron and a nerve?
  1. One has sensory functions, the other has motor functions.
  2. Nerves are found only in the central nervous system.
  3. Nerves are found only in vertebrates.
  4. One is a single cell while the other is a collection of different cell types.
College Nervous and Endocrine Systems
Which branch of the nervous system includes all of the others?
  1. parasympathetic
  2. motor
  3. sympathetic
  4. autonomic
  5. efferent peripheral
College Nervous and Endocrine Systems
While sitting quietly watching television, you suddenly hear the sound of glass breaking. Which is responsible for your resulting rapid heartbeat?
  1. parasympathetic division of the autonomic nervous system
  2. enteric nervous system
  3. central nervous system
  4. sympathetic division of the autonomic nervous system
College Nervous and Endocrine Systems
College Adaptations and Behavior
College Nervous and Endocrine Systems
The brain determines the pitch of a sound from the                                                        .
  1. part of the brain receiving nerve impulses from the ear
  2. intensity of nerve impulses received
  3. part of the basilar membrane stimulated by sound
  4. rate of nerve pulses received
College Zoology
An invertebrate missing its statoliths would be                                                                                   .
  1. hearing-impaired, but not completely deaf
  2. unable to send action potentials from the ears to the brain
  3. unable to determine which way is up and which way is down
  4. unable to tell the difference between auditory and equilibrium sensory information
College Adaptations and Behavior
Compound eyes are advantageous for small prey species to detect a potential predator because                                                                      .
  1. compound eyes allow animals to detect ultraviolet radiation
  2. with compound eyes, the brain forms many separate visual images
  3. light is not necessary for compound eyes to produce action potentials
  4. they permit sensitive motion detection
College Anatomy and Physiology
College Zoology
Which of the following is an example of a fixed action pattern?
  1. A spider tracks its prey.
  2. A hamster becomes active at the same time each evening.
  3. A stickleback fish attacks a wood block with a red bottom.
  4. A robin eats a noxious bug, spits it out, and never eats a bug that looks like that again.
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