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College Science Questions

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College Nervous and Endocrine Systems
Generally speaking, the intensity of a stimulus (e.g., loudness of a sound, tactile pressure, etc.) is encoded in                                                                            .
  1. the frequency of action potentials transmitted to the CNS
  2. the strength (amplitude) of action potentials transmitted to the CNS
  3. both the frequency and strength of action potentials transmitted to the CNS
  4. the location onto which the sensory information maps in the brain
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 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 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.
College Zoology
In the study of animal behaviors, which pairing of causation with its question is accurate?
  1. proximate- "What stimulus elicits the behavior?"
  2. ultimate - "What physiological mechanisms mediate the response?"
  3. proximate - "How does the behavior aid in survival and reproduction?"
  4. ultimate - "How does the animal's experience during growth and development influence the response?"
College Zoology
Which is an example of a circannual rhythm?
  1. Mosquitoes are most active at dawn and dusk.
  2. Just as the sun sets, bats leave their cave in large swarms.
  3. Every spring, cardinals gather in the park to build nests and reproduce.
  4. Fiddler crabs exhibit courtship behavior based on the phase of the moon.
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 Skin, Skeleton, and Muscles
The "motor unit" in vertebrate skeletal muscle refers to what?
  1. one actin binding site and its myosin partner
  2. an entire muscle
  3. one sarcomere and all of its actin and myosin filaments
  4. one motor neuron and all of the muscle fibers on which it has synapses
College Zoology
Which control system dominates in the animal body?
  1. endocrine system
  2. nervous system
  3. respiratory system
  4. digestive system
College Nervous and Endocrine Systems
Which statement below is NOT true regarding the organization of the vertebrate brain?
  1. The forebrain is enlarged in both birds and mammals.
  2. The midbrain is reduced in both birds and bony fishes.
  3. The hindbrain is largely responsible for reflex responses and regulation of homeostatic functions.
  4. The midbrain is an important structure for sensory routing
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
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
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