Biology Forums - Study Force

The spinal cord has
 
  A) a core of gray matter surrounded by white matter.
  B) a cervical and lumbar enlargement.
  C) 31 segments.
  D) all of the above.

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(Question 2) The part of the tRNA that binds mRNA is the anticodon.
 
  Indicate whether the statement is true or false

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(Question 3) Rotation of the forearms so the palms face upward is called pronation.
 
  Indicate whether the statement is true or false

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(Question 4) The heart pumps about ____ liters of blood a day and contracts about _____ times in a
  lifetime.
 
  A) 3,000 liters; 2 billion B) 1,200 liters; 2 billion
  C) 7,000 liters; 2.5 billion D) 1,000 liters; 1 billion

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(Question 5) As epidermal cells move up through the strata away from their blood supply, they die
  and become keratinized.
 
  Indicate whether the statement is true or false

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(Question 6) All hormones are
 
  A) proteins. B) inorganic compounds.
  C) steroids. D) organic compounds.

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(Question 7) Drugs that inhibit the enzyme monoamine oxidase
 
  A) decompose serotonin.
  B) decrease the activity of serotonin.
  C) allow increased activity of norepinephrine.
  D) decompose norepinephrine.

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(Question 8) Codons are three contiguous mRNA bases.
 
  Indicate whether the statement is true or false

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(Question 9) If the left corticospinal tract is severed in the neck near the first cervical vertebra,
 
  A) pain impulses from the right side are blocked.
  B) muscles in the right arm and leg are paralyzed.
  C) muscles in the left arm and leg are paralyzed.
  D) pain impulses from the left side are blocked.

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(Question 10) A pole vaulter keeps track of his position in mid-air through
 
  A) pain receptors. B) baroreceptors.
  C) lamellated corpuscles. D) proprioceptors.

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