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College Nervous and Endocrine Systems Questions

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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 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
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 Nervous and Endocrine Systems
If the following events are arranged in the order in which they occur for an animal hiding and holding still in response to seeing a predator, which is the fourth event in the series?
  1. signaling by an efferent PNS neuron
  2. information processing in the CNS
  3. signaling by an afferent PNS neuron
  4. activation of a sensory receptor
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
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
What happens when a resting neuron's membrane depolarizes?
  1. The cell's inside becomes more negative than the outside.
  2. The equilibrium potential for K+ becomes more positive.
  3. The neuron's membrane voltage becomes more positive.
  4. There is a net diffusion of Na+ out of the cell.
College Nervous and Endocrine Systems
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
What is the correct sequence of neuronal structures that a signal would travel through in a motor neuron for the biceps brachii muscle to contract?
  1. synaptic terminals, dendrites, cell body, axon, axon hillock, biceps brachii muscle fiber
  2. dendrites, cell body, axon, axon hillock, synaptic terminals, biceps brachii muscle fiber
  3. axon, cell body, synaptic terminals, dendrites, axon hillock, biceps brachii muscle fiber
  4. dendrites, cell body, axon hillock, axon, synaptic terminals, biceps brachii muscle fiber
College Nervous and Endocrine Systems
College Nervous and Endocrine Systems
Tastes and smells are distinct kinds of environmental information in that                                                                                                      .
  1. distinguishing tastant molecules requires learning, whereas smell discrimination is an innate process
  2. humans can detect many more types of tastants than odorants
  3. odorants are airborne, and tastants are present in fluids
  4. odorants bind to receptor proteins, but none of the tastant stimuli will bind to receptors
College Nervous and Endocrine Systems
Where are neurotransmitter receptors located?
  1. the postsynaptic membrane
  2. the nuclear membrane
  3. synaptic vessicle membranes
  4. dendrite membranes of the presynaptic cell
College Nervous and Endocrine Systems
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
Acetylcholinesterase is the enzyme that degrades acetylcholine. What effect on nerve transmission would occur following the administration of a chemical that inhibited acetylcholinesterase?
  1. Synaptic transmission would be prevented, causing muscle paralysis.
  2. It would be similar to giving an anesthetic, but it would last permanently.
  3. Continuous excitatory postsynaptic potentials would occur in the postsynaptic muscle fiber.
  4. The presynaptic neuron would be inactivated.
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