Biology Forums - Study Force

The gray commissure of the spinal cord surrounds the central canal.
 
  Indicate whether the statement is true or false

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(Question 2) The antibodies produced in allergic reactions
 
  A) belong to the immunoglobulin E group.
  B) belong to the immunoglobulin G group.
  C) are called allergens.
  D) are secreted by mast cells.

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(Question 3) A blood clot that forms abnormally in a blood vessel is a(n)
 
  A) thrombus. B) platelet plug. C) embolus. D) aneurysm.

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(Question 4) The external carotid arteries branch to structures in the
 
  A) base of the skull. B) face.
  C) all of the above. D) scalp.

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(Question 5) Rods are more sensitive to light than cones, but cones are important for color vision.
 
  Indicate whether the statement is true or false

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(Question 6) Which of the following are cytokines?
 
  A) Antibodies and antigens
  B) Colony-stimulating factors, interferons, interleukins, tumor necrosis factor
  C) Histamine and leukotrienes
  D) Autoantibodies and immunosuppressants

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(Question 7) The hormone that the pineal gland secretes is
 
  A) melanoma. B) myostatin.
  C) melatonin. D) beta endorphin.

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(Question 8) The choroid plexuses project into the ventricles.
 
  Indicate whether the statement is true or false

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(Question 9) What is the difference between serum and plasma?
 
  A) Plasma contains calcium; serum does not.
  B) Plasma contains albumin; serum does not.
  C) Plasma does not have blood cells; serum does.
  D) Plasma contains fibrinogen; serum does not.

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(Question 10) A forceful, sustained muscle contraction is called a ______ ______.
 
  Fill in the blank(s) with correct word

1) TRUE

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2) A

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3) A

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4) C

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5) TRUE

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6) B

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7) C

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8) TRUE

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9) D

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10) tetanic contraction

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