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College Anatomy and Physiology 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 Anatomy and Physiology
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 Circulatory and Immune Systems
What are the two phagocytic white blood cells of the innate immune system?
  1. neutrophils and monocytes
  2. B-lymphocytes and eosinophils
  3. eosinophils and monocytes
  4. monocytes and B-lymphocytes
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 Skin, Skeleton, and Muscles
During the contraction of a vertebrate skeletal muscle fiber, calcium ions                                                                                             .
  1. transmit action potentials from the motor neuron to the muscle fiber
  2. spread action potentials through the T tubules
  3. bind with troponin, changing its shape so that the myosin-binding sites on actin are exposed
  4. break cross-bridges by acting as a cofactor in ATP hydrolysis
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
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