A polarized cell
a) has a charge imbalance across its membrane.
b) includes most cells of the body.
c) exhibits a membrane potential.
d) includes most cells of the body and exhibits a membrane potential.
e) All of these choices are correct.
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Question 2) Myofibrils contain
a) contractile proteins.
b) regulatory proteins.
c) structural proteins.
d) all of these answers are correct.
e) none of these answers are correct.
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Question 3) Which of the following structures contains only sensory axons that conduct nerve impulses from sensory receptors in the skin, muscles and internal organs to the CNS?
a) Spinal nerves
b) Cauda equina
c) Anterior root of spinal nerves
d) Posterior root of spinal nerves
e) Conus medullaris
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Question 4) Which brain vesicle gives rise to the midbrain and cerebral aqueduct?
a) Prosencephalon
b) Mesencephalon
c) Rhombencephalon
d) Telencephalon
e) Myelencephalon
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Question 5) Patient X has a tumor of the parathyroid glands that causes a hypersecretion of PTH from these glands. Predict the effect this hypersecretion would have on the skeletal system and on the secretion of calcitonin from the thyroid gland.
What will be an ideal response
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Question 6) Which bone of the axial skeleton does NOT articulate with any other bone?
a) Vertebrae
b) Ethmoid
c) Sternum
d) Hyoid
e) Ilium
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Question 7) Schwann's cells begin to form myelin sheaths around axons in the peripheral nervous system
a) when neurons are injured.
b) during fetal development.
c) after birth.
d) only in response to electrical stimulation by neuroglial cells.
e) during the early onset of Alzheimer's disease.
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Question 8) Which of the following carpal bones is named for its large hook-shaped projection on its anterior surface?
a) Lunate
b) Scaphoid
c) Triquetrum
d) Hamate
e) Pisiform
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Question 9) Briefly describe four main benefits of stretching before exercising.
What will be an ideal response
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Question 10) What spinal cord feature is the area where the nerves that supply the lower limb emerge?
a) Lumbar enlargement
b) Filum terminale
c) Cauda equina
d) Cranial nerve XII
e) Cervical enlargement
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