Competitive Exams: Medical Science MCQs (Practice-Test 23 of 135)

  1. Oligodendrocytes are located in the _____.

    1. PNS

    2. CNS

    3. Both

    4. None

    Answer: b

  2. Schwann cells are located in the _____.

    1. PNS

    2. CNS

    3. Both

    4. None

    Answer: a

  3. Which of the following types of cells is the most common in the CNS?

    1. Astrocytes

    2. Oligocytes

    3. Neurocytes

    4. Celiac cells

    Answer: a

  4. Which of the following is a regulatory protein in the cytoplasm that helps the processes at the synapse?

    1. Calmodulin

    2. Protein kinase

    3. Ligand

    4. Gap protein

    Answer: a

  5. Myasthenia gravis is due to ____ receptors being blocked and destroyed by antibodies.

    1. Epinephrine

    2. Nicotinic

    3. Acetylcholine

    4. Transient

    Answer: c

  6. The primary effect of cocaine on the nervous system is that cocaine blocks the re-uptake of ____.

    1. Monoamines

    2. Transamines

    3. Catecholamine

    4. Monoamine oxidase

    Answer: a

  7. Which of the following amino acids can function as a neurotransmitter in the CNS?

    1. Leucine

    2. Glutamic acid

    3. Lysine

    4. Valine

    Answer: b

  8. Huntington's chorea has been linked with a deficiency in the amino acid ______.

    1. Lysine

    2. GABA

    3. Valine

    4. Tyrosine

    Answer: b

  9. Which of the following is not considered a monoamine?

    1. Epinephrine

    2. Norepinephrine

    3. Dopamine

    4. Adenosine

    Answer: d

  10. Which of the following is not considered a catecholamine?

    1. Dopamine

    2. Norepinephrine

    3. Serotonin

    4. Epinephrine

    Answer: c