Skip to content
Past Exams

2024 BIOS252 Biology Comprehension Exam With Answers (133 Solved Questions)

Build confidence with 2024 BIOS252 Biology Comprehension Exam With Answers, filled with real exam questions that help you refine your test-taking strategy.

Preview 7 of 21 pages

See the first 7 pages exactly as they appear in the document.

  1. Page 1
    Read page 1 as text

    BIOS 252 COMPREHENSION EXAM 2024 4 Versions Already Rated A+ From Expert With Complete Solutions VERSION 1 2 types of summation - *temporal (wave) summation: one presynaptic neuron to one postsynaptic membrane *spacial summation: multiple presynaptic neurons to one postsynaptic membrane describe ligand gated channels - responds to chemical stimuli that bond to receptors describe voltage gated channels - respond to a direct change in membrane potential describe mechanically gated channels - responds to mechanical change describe hyperpolarization - membrane potential makes inside of cell more negative than resting potential 6 glial cells found in NS - *satellite *schwann *oligodendrocytes *microglial *astrocytes *ependymal function of the satellite cells - provides support for the nerves in the PNS function of the schwann cells - produce myelin in PNS function of oligodendrocytes - produce myelin in CNS function of the microglial cells - work as macrophages in CNS

  2. Page 2
  3. Page 3
    Read page 3 as text

    function of the astrocytes - *creates blood brain barrier *most abundant cell in the CNS function of the ependymal cells - produce cerebral spinal fluid describe the reticular activating system - bundle of nerves at brain stem that filters out unnecessary info so the imp. info gets through identify the lesser tubercle of the humerus - identify the lateral epicondyle of the humerus – what are the 9 abdominopelvic regions? - *left hypochondriac *epigastric *right hypochondriac *left lumbar *umbilical *right lumbar *left inguinal (iliac) *hypogastric *right inguinal (iliac) what are the 11 organ systems - *nervous *respiratory *endocrine *digestive *muscular *reproductive *circulatory *integumentary *skeletal *lymphatic *urinary function of nervous system - transmits signals from the brain to the rest of the body function of respiratory system - brings oxygen into the body while removing carbon dioxide

  4. Page 4
    Read page 4 as text

    function of endocrine system - regulates body activities by releasing harmones function of digestive system - break down and absorbs nutrients from food and liquid and removes waste function of muscular system - movement and heat production function of reproductive system - creates offspring and releases hormones to regulate reproduction function of circulatory system - deliver blood to cells of the body function of integumentary system - *protection *vitamin D synthesis *sensation *thermoregulation *nonverbal communication function of lymphatic system - to produce, maintain, and distribute lymphocytes function of urinary system - *elimination of excess water and waste *control of pH definition of homeostasis - the maintenance of a constant internal environment define a negative feedback loop - changes are met with responses that restore the balance back to the original state define a positive feedback loop - changes are met with responses that amplify themselves until balance is restored describe a covalent bond - *typically between nonmetals *form through the sharing of electrons *there are 2 different types of these bonds: polar covalent and nonpolar covalent describe a polar covalent bond - when one atom in a bond has a higher electronegativity causing the electrons to be shared unequally

  5. Page 5
    Read page 5 as text

    describe an ionic bond - *typically between metals and nonmetals *form through the transfer of electrons *form between cations (+) and anions (-) describe a hydrogen bond - weak bond between a hydrogen atom and a pair of other atoms that have a high affinity for electrons describe a synthesis reaction - *occurs when two or more simple compounds combine to form a more complicated one *requires energy (endothermic) describe a decomposition reaction - *occurs when a complex molecule breaks down to make simpler ones *releases energy (exothermic) define a reactant - start the reaction define a product - what you're left with after a reaction what are 2 characteristics of an acid - *willing to give up an H+ ion *has a ph of <7 what are 2 characteristics of a neutral - *can function as either an acid or a base *has a ph of 7 what are 2 characteristics of a base (alkaline) - *accepts H+ ion *has a ph >7 what is the ph of blood - 7.35-7.45 function of nucleus - directs cell activity and contains DNA function of nucleolus - ribosome synthesis function of golgi apparatus - modifies, sorts, and packages proteins set for their destination function of mitochondria - ATP production

  6. Page 6
    Read page 6 as text

    function of lysosomes - intracellular digestion, cell death (apoptosis) function of ribosomes - protein synthesis function of smooth endoplasmic reticulum - lipid synthesis function of rough endoplasmic reticulum - protein and lipid synthesis function of cell membrane - regulates what enters and leaves the cell what is active transport - *low to high concentration *requires ATP what are 2 types of active transport - *endocytosis- inside the cell *exocytosis- outside the cell what is passive transport - *high to low concentration *doesn't require ATP what are 2 types of passive transport - *osmosis *simple diffusion what is facilitated diffusion - the passive movement of a particle across a cell membrane via a channel protein 2 types of chromosomes in the human cell - *diploid (46, mitosis) *haploid (23, meiosis) what are the 6 steps of mitosis - 1. interphase 2. prophase 3. metaphase 4. anaphase 5. telophase 6. cytokinesis what occurs during interphase - *G1- resting phase *S- duplication of DNA and centrioles

  7. Page 7
    Read page 7 as text

    *G2-preparation for mitosis what occurs during prophase - 1. nuclear envelope disappears 2. chromatin condenses into chromosomes 3. spindle fibers form centrioles 4. centrioles move to opposite sides what occurs during metaphase - chromosomes meet in the center of the cell what occurs during anaphase - sister chromatids separate what occurs during telophase - 1. spindle fibers start to disappear 2. chromosomes uncoil 3. new nucleus forms what occurs during cytokinesis - cytoplasm divides what are the 4 tissue types - *epithelial *connective *muscle *nervous 7 subtypes of epithelial tissue - *simple *stratified *psuedostratified *squamous *cuboidal *columnar *transitional (cuboidal when relaxed, squamous when stretched) 11 subtypes of connective tissue - *blood *bone *hyaline cartilage *fibrocartilage *elastic cartilage *dense regular *dense irregular *adipose *areolar

14 more pages in the full document

Unlock it once and it stays in your library, ready to chat with or turn into flashcards.

Unlock the full document

More Biology study materials

See all

Study this document with CramX

Once it is in your library, every tool can work from it.