Directions: Multiple choice please help me to answer the follwoing
questions.  Choose the single best answer for each question below .
 
1.  The notochord induces directly the formation of the: 
 
A. Neural crest 
B. Neurotube 
C. Neuroplate 
D. Rostral neural pore 
E. Caudal neural pore 
 
 
2.     Autonomic nervous system consists of: 
 
A. Parasympathetic neurons 
B. Sympathetic neurons 
C. Preganglionic neurons 
D. Postganglionic neurons 
E. All of these above 
 
3.  The cranial dura differs from the dura covering the spinal cord in
that:
 
A. There is an actual epidural space in the skull but not in the
vertebral column
B. The cranial dura serves as the periosteum for the skull and the
spinal dura does  not
C. The cranial dura has no reflections and the spinal dura has 
D. The cranial dura is immediately adjacent to pia mater and the
spinal dura is next  to the arachnoid
  
4.   All of the following are true about the Autonomic nervous system
EXCEPT:
 
A. It provides motor innervation of the visceral organs 
B. It provides sensory innervation of the visceral organs 
C. It is a specialized part of the Central and the Peripheral Nervous
System
D. It requires two neurons in tandem for proper functioning  
 
5.   Cranial meninges are derived from the: 
 
A. Surface ectoderm 
B. Neural tube 
C. Splanchnic mesoderm 
D. Somatic mesoderm 
E. Neural crest 
 
6.  The major function of pia mater is to: 
 
A. Produce cerebrospinal fluid 
B. Provide vascular supply to the meninges 
C. Provide vascular supply to the brain 
D. Form the sulci 
E. Form the gyri 
 
7.  The neuroepithelium gives rive to all of the following EXCEPT: 
 
A. Ependymal cell 
B. Motor neurons in lateral horn 
C. Motor neuron in ventral horn 
D. Neuroglia 
E. Sensory neurons in dorsal root ganglion 
 
8.     Cerebrospinal fluid is produced in all of the following EXCEPT:
 
A. Lateral ventricles 
B. Third ventricle 
C. Aqueduct 
D. Fourth Ventricle 
 
9.     All of the following are true statements EXCEPT: 
 
A. The mesenchyme in the head region is derived from neural crest
cells
B. Mesencephalon is the least modified brain segment as compared to
the other  primary brain vesicles
C. Neural plate formation is essential for the formation of the
primitive streak
D. Primitive streak formation is essential for the formation of the
notochord
E. The neural tube gives rise to the Central Nervous System 
 
 
TRUE OR FALSE.  MARK 'T' FOR TRUE AND 'F' FOR FALSE 
 
 10. A negative Dick test means that the subject is not immune to
erythrogenic toxin.
 
11. Erythrogenic toxin producing strains of Streptococcus pyogenes are
infected with a lytic bacteriophage.
 
12. Streptococcal M protein is associated with the capsular antigen. 
 
13. The inactivation of streptolysin 0 by cholesterol may be reversed
by cysteine.
 
14. Bacillus anthracis may survive in the soil for 20-30 years. 

15.   At the end of a quiet expiration the intra-alveolar pressure is:

A. +1 mmHg (above atmospheric) 

B. 0 mmHg

C. -1 mmHg

D. -2 mmHg 

E. -3 mmHg  


16.   The increased release of oxygen from hemoglobin in the presence
of increased PC02 or decreased pH is called the:


A. Cushing effect

B. Haldane effect

C. Bohr effect

D. Bering-Breuer effect

E. None of the above 


17.   The decreased blood total C02 that occurs in the presence of
high P02 is called the:


A. Cushing effect

B. Haldane effect

C. Bohr effect

D. Bering-Breuer effect

E. None of the above 


18.   The direct stimulus for the central chemoreceptor
(chemosensitive) are/is:

A. Decreased arterial pH

B. Increased arterial PC02

C. Decreased CSF pH

D. Decreased CSP p02

E. All of the above

19.Trimethoprim acts:

A.to reduce the supply of 1-carbon units
B. by combining with 80s ribosomes
C. is an antimetabolite
D. by blocking utilization of para-amino-benzoic acid (PABA)
E. by inhibiting bacterial dihydrofolate reductase more than animal
   dihydrofolate reductase.

mashhour: if you are studying to be a doctor, I'd suggest you make the
effort to get your answers yourself. The effort will be rewarded by
making you a better doctor, one who is willing to struggle a bit to
get solutions.