Which of the following muscles fixes and depresses the ribs and stabilizes the pelvis during walking?
A) transversus abdominis
B) internal oblique
C) external oblique
D) rectus abdominis
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Question 2) When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________.
A) action potential
B) excitatory potential
C) postsynaptic potential
D) generator potential
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Question 3) An action potential is regarded as an example of a positive feedback. Which of the following examples below best illustrates the positive feedback aspect of an action potential?
A) The sodium potassium pump consistently moves ions as long as ATP is available, and regardless of membrane potential changes.
B) Potassium permeability is about 25 times greater than sodium ions.
C) Voltage gated potassium ion channels open slowly and remain open long enough to cause hyperpolarization.
D) A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels.
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Question 4) What symptoms would a nurse focus on in his or her care of a patient with multiple sclerosis?
What will be an ideal response
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Question 5) If a lever operates at a mechanical disadvantage, it means that the ________.
A) effort is farther than the load from the fulcrum
B) load is near the fulcrum and the effort is at the distal end
C) lever system is useless
D) load is far from the fulcrum and the effort is applied near the fulcrum
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Question 6) Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?
A) Sodium gates will open first, then close as potassium gates open.
B) A single type of channel will open, permitting simultaneous flow of sodium and potassium.
C) Specific sodium gates will open.
D) Specific potassium gates will open.
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Question 7) An inhibitory postsynaptic potential (IPSP) is associated with ________.
A) lowering the threshold for an action potential to occur
B) a change in sodium ion permeability
C) hyperpolarization
D) opening of voltage-regulated channels
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Question 8) A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). She asks the nurse, Why did this have to happen to me again? I was doing so well.
Explain why some forms of MS are characterized by periods of remission and exacerbation.
What will be an ideal response
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Question 9) Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon?
A) the semitendinosus
B) the tibialis anterior
C) the gastrocnemius
D) the sartorius
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Question 10) Immediately after an action potential has peaked, which of the following channels will open?
A) voltage gated calcium channels
B) chemically gated chloride channels
C) voltage gated potassium channels
D) voltage gated sodium channels
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