Blood flow through a capillary bed is regulated by precapillary sphincters.
Indicate whether the statement is true or false
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Question 2) When a neuron is stimulated, Na+ gates open and allow Na+ to exit the cell.
Indicate whether the statement is true or false
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Question 3) The ________ houses the pituitary gland (hypophysis) and is found in the ________.
A) foramen magnum; occipital bone
B) sella turcica; sphenoid bone
C) supraorbital margin; frontal bone
D) occipital condyle; occipital bone
E) lambdoid suture; parietal bones
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Question 4) The constant appearance of new strains of influenza virus is an example of ________.
A) evolution
B) survivorship
C) a model
D) selection pressure
E) success
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Question 5) The macula sacculi is nearly horizontal and the macula utriculi is nearly vertical.
Indicate whether the statement is true or false
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Question 6) Since there are no genes coding for carbohydrates, nucleic acids, or lipids, how do cells produce them?
A) Cells import these products from older cells.
B) Cells can produce carbohydrates, nucleic acids, and lipids out of proteins.
C) Enzymes encoded by genes synthesize these products.
D) Cells are born with all the products they need.
E) Cells absorb these products by endocytosis.
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Question 7) A change in the genetic composition of a population over time is called ________.
A) selection pressure
B) adaptation
C) mutation
D) evolution
E) natural selection
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Question 8) After translation, a protein may undergo structural changes called ________ modifications.
A) polyribosomal
B) posttranslational
C) posttranscriptional
D) secretory
E) splicing
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Question 9) The ossicles belong to the middle ear.
Indicate whether the statement is true or false
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Question 10) An action potential never occurs in dendrites.
Indicate whether the statement is true or false
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