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Bio Questions

Discussion in 'DAT Discussions' started by elaine07, May 1, 2007.

  1. elaine07

    elaine07

    7
    0
    Apr 2, 2007
    Hi, I was doing some practice problems and I have problems with these questions. I don't know if my answers are any right. Can anyone please help me verify it? Thanks a lot...

    1) This type of junction is formed when membrane channels of adjacent plasma membranes adhere to each other.



    a. tight junction
    b. Cell junction
    c. Desmosome
    d. Gap junction

    2) Which of the following is not a characteristic of meiosis?



    a. Four haploid gametes
    b. A reduction division
    c. Two steps of cell division
    d. Two haploid gametes


    3) The large fluid-filled spaces within the brain are called the:


    a. meninges.
    b. sulci
    c. gyri.
    d. ventricles.


    4) The three divisions of the brain that make up the brainstem are the:
    a. medulla oblongata, thalamus, and pons.
    b. medulla oblongata, thalamus, and midbrain.
    c. medulla oblongata, midbrain, and pons.
    d. medulla oblongata, pons, and cerebellum.

    5) Both sympathetic and parasympathetic divisions are tonically active, which means they:
    a. have opposing effects.
    b. continually conduct impulses to autonomic effectors.
    c. continually conduct impulses to the brain.
    d. are hydrolyzed by the enzyme acetylcholinesterase.

    6) The sense organs involved in the sense of balance are found in the vestibule and the:


    a. organ of Corti.
    b. macula.
    c. otoliths.
    d. semicircular canals.

     
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  3. DailyDrivenTJ

    DailyDrivenTJ 2+ Year Member

    227
    0
    Mar 20, 2007
    I am almost sure about 4 and 6.

    C & C

    #1 I think it would be gap junction since "channel" are adjoining. Tight junction is almost impermeable.
     
  4. Lonely Sol

    Lonely Sol cowgoesmoo fan! 10+ Year Member

    684
    0
    Dec 13, 2005
    Atlanta, GA
    For 2. I would what you picked, but technically isnt it kinda stupid question since if you have four haploid cells, you will definately have 2.

    4. C

    Also, is it possible if you could tell us what practice tests is it from, those are some interesting questions!
     
  5. Fonz

    Fonz 7+ Year Member

    554
    0
    Jun 20, 2006
    1 - I'd say gap junct too b/c I know that gap junctions are when cells are connected together by pores.

    4 - Cerebellum I think is part of the hindbrain.

    5 - I know for sure that the symp and parasymp DO NOT conduct impulses TO the brain b/c they are only Efferent and automomic. Maybe its 'B'?

    6 - I thought it was the semicirc canals??
     
  6. Lonely Sol

    Lonely Sol cowgoesmoo fan! 10+ Year Member

    684
    0
    Dec 13, 2005
    Atlanta, GA
    yes, your 5 make sense but 6 is a weird one

    5. Sympathic and parasym. are from autonomic nervous system, which only has motor neurons while somatic nervous system have both motor and sensory neurons. Since, ANS only has motor neurons, which conduct impulse away from the brain, therefore it can't be C. B is the only good choice.

    6. C. The otolith organs (the utricle and the saccule) are structures in the inner ear, specifically in the vestibular labyrinth, that are sensitive to gravity and linear acceleration. Because of their orientation in the head, the utricle is sensitive to a change in horizontal movement, and the saccule gives information about vertical acceleration (such as when in an elevator).

    However, its hard to say why semicircular canals could not be the answer?
    Plz correct me if I am wrong!
     
  7. domonas

    domonas Junior Member 5+ Year Member

    118
    4
    Jul 26, 2006
    these are my opinions... i have not looked at a text book, so take these with a grain of salt.

    #1 - correct
    #2 - correct
    #3 - ? i dunno
    #4 - incorrect, C
    #5 - sounds right
    #6 - incorrect, D
     
  8. gochi

    gochi 10+ Year Member

    1,105
    0
    Nov 24, 2006
    What The Heck!!!

    Ok Guys, Are You Telling Me That You Learned All Of This In Undergrad Bio, Because I Did Not!!!
     
  9. Streetwolf

    Streetwolf Ultra Senior Member Dentist 7+ Year Member

    1,801
    5
    Oct 25, 2006
    NJ
    Anatomy / Physio...
     
  10. dentstd

    dentstd Fena Gonzales 2+ Year Member

    1,669
    14
    Oct 14, 2006
    The question asks about balance. From your answer, the otolith organs deal more with feeling the rush as you're accelerating. Semicircular canals should be the better answer.
     
  11. pre-dentalguy

    pre-dentalguy Senior Member 7+ Year Member

    532
    2
    Jan 7, 2006
    GA

    Gosh, what school are you at taking these types of questions?

    Marion
     

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