Which blood vessel drains blood from the abdomen, pelvis, and hindlimbs?

1) B
Explanation:
A) The precava is the large vessel that drains blood from the head, neck, and forelimbs to the right atrium.
C) The internal jugular vein drains the brain and spinal cord.
D) The axillary vein is the major vessel draining the forelimb in the armpit.

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2) A
Explanation:
B) Active transport requires energy from the cell.
C) Although facilitated diffusion does not require any energy, it does require assistance of a protein carrier.
D) One of the listed responses is correct.

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3) D
Explanation:
A) Cortisol is not a regulator of electrolyte concentrations.
B) Insulin is not a regulator of electrolyte concentrations.
C) Glucagon is not a regulator of electrolyte concentrations.

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4) C
Explanation:
A) Replication of DNA occurs during the S phase.
B) During the G0 phase of interphase, the cell performs its specialized functions and is not preparing to divide.
D) The G2 phase is another time for protein synthesis; at this point, replication of the centriole pair is completed.

Exercise 6: Movement Across Plasma Membranes

Exercise 6: Pre-Lab Questions

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5) D
Explanation:
A) Proteins are not chemical substances that are secreted into extracellular fluids.
B) Enzymes are not chemical substances secreted into extracellular fluids.
C) Antibodies are not chemical substances that are secreted into extracellular fluids.

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6) C
Explanation:
A) The G1 phase is a time for protein synthesis, growth, and replication of organelles, including the centriole pair.
B) During the G0 phase of interphase, the cell performs its specialized functions and is not preparing to divide.
D) The G2 phase is another time for protein synthesis; at this point, replication of the centriole pair is completed.

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7) C
Explanation:
A) Separation of the chromosomes is the event that defines anaphase.
B) During prophase the chromosomes become visible in the nucleus.
D) In telophase, cytokinesis partitions the cytoplasm of the cell and mitosis nears completion, as each batch of chromosomes unwinds inside a newly formed nuclear envelope.

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8) A
Explanation:
B) The radial and ulnar veins drain into the brachial vein before becoming the axillary vein.
C) The subclavian, costocervical, and vertebral veins drain into the brachiocephalic veins.
D) The intercostal veins drain blood from the intercostal muscles into the azygous vein.

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9) D
Explanation:
A) The scala tympani contains perilymph.
B) Distortion of the basilar membrane causes the hair cells to vibrate.
C) The scala vestibuli contains perilymph.

Exercise 33: Endocrine System

Exercise 33: Pre-Lab Questions

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10) A
Explanation:
B) Damage to the cochlea causes nerve deafness.
C) Damage to the cochlear nerve causes nerve deafness.
D) Damage to the basilar membrane causes nerve deafness.

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