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
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