Language Worksheet #2


Name: ________________________________ E.N. ___

Use your textbook and class notes to answer these questions.


  1. The branch of biological science that studies and describes how body parts work or function is ______________
  2. The study of the shape and structure of body parts is _______________
  3. The tendency of the bodys systems to maintain a relatively constant or balanced internal environment is ____________________
  4. the term that indicates ALL chemical reactions occurring in the body is _____________
  5. The structures of the body are organized into successively larger and more complex structures.  Fill in the answer blanks with the correct terms for these increasingly larger structures.  Chemicals _____________-->  ______________   ___________--> ______________ organism
  6. Circle the term that does not belong in each of the following groupings. 

a.  atom   cell   tissue   alive    organ

b.  brain   stomach   heart    liver    epithelium

c.  epithelium    heart    muscle tissue   nervous tissue    connective tissue

d.  human   digestive system    horse    pine tree   amoeba


7- 20 Identify the organ systems to which the following organs or functions belong.  Insert the correct term in the answer blanks.

Key choices:  cardiovascular     integumentary     nervous    skeletal    digestive    lymphatic/immune    reproductive    urinary    endocrine    muscular    respiratory

  1. Rids the body of nitrogen-containing wastes
  2. is affected by the removal of the thyroid gland
  3. provides support and levers on which the muscular system can act
  4. protects underlying organs from drying out and mechanical damage
  5. protects the body; destroys bacteria and tumor cells
  6. breaks down foodstuffs into small particles that can be absorbed
  7. delivers oxygen and nutrients to the body tissues
  8. moves the limbs; allows facial expression
  9. conserves body water or eliminates excesses
  10. controls the body with chemicals called hormones


Using the same key choices for # 7-16 choose the organ system to which each of the following sets of organs belongs by writing the system in the blank

  1. blood vessels, heart
  2. pancreas, pituitary, adrenal glands
  3. kidneys, bladder, ureters
  4. esophagus, large intestine, rectum


#21-23  Match the terms to the descriptions: 

terms:  digestion   excretion    growth    maintenance of boundaries    metabolism    movement    responsiveness    reproduction

  1. keeps the bodys internal environment distinct from the external environment
  2. at the cellular level, membranes; for the whole organism, the skin
  3. occurs when constructive activities  occur at a faster rate than destructive activities


24.  The above terms describe:  a.  necessary life functions    b.  things needed to survive


#25-27  Match the terms to the descriptions: 

terms: appropriate body temperature     nutrients     water     atmospheric pressure    oxygen


  1. single substance accounting for over 60% of the body weight
  2. when too high or too low, physiological activities cease, primarily because molecules are destroyed or become nonfunctional
  3. essential for normal operation of the respiratory system and breathing


28.  The above terms describe:  a.  necessary life functions    b.  things needed to survive


Complete each statement by inserting word(s) in the blanks

There are three essential components of all homeostatic control mechanisms:  control center, receptor, and effector.  The __29___ senses changes in the environment and responds by sending information (input) to the __30___ along the _31_____ pathway.  The __32____analyzes the input, determines the appropriate response, and activates the _33____ by sending information along the __34___ pathway.  When the response causes the initial stimulus to decline, the homeostatic mechanism is referred to as a _35______ feedback mechanism.  When the response enhances the initial stimulus, the mechanism is called a __36___ feedback mechanism.  _37___ feedback mechanisms are much more common in the body.


38.    Give an example of a negative feedback mechanism

39.    Give an example of a positive feedback mechanism