Name ______________________________________________________18 April 2005
Bio 127 Exam #3
Multiple Choice: (24 Pts) Circle the letter that corresponds to correct answer(s). There
may be any number of correct answers in each question.
1) MOST nitrogenous waste in humans is excreted in the form of (there is only one
correct answer to this question):
d. Uric Acid
2) The renal cortex is:
a. A connective tissue layer
b. The inner-most layer of the kidney
c. Where urine collects
d. Middle layer of the kidney
e. Outer layer of the kidney
3) Bone cells live in openings called ___________________.
4) Skeletal system functions include:
b. Mineral storage
d. Water balance
e. Production of blood
5) The axial skeleton is composed of
c. Hyoid bone
d. Pelvic girdle
e. Pectoral girdle
Human Biology Exam 18 April 2005 1
6) The types of muscles include:
7) During skeletal muscle contraction, the following do NOT get shorter:
c. The A band
d. The H Zone
e. The I Band
f. The Z line
g. The sarcomere
a. Support Neurons
b. Produce Cerebral Spinal Fluid
c. Act as a defense for the nervous system
d. Speed up nerve impulses
Fill in the blank: (15 Pts) with the word or phrase that best completes the sentence
9) When I say “ATP” you say “___________________________________.”
10) Urine is stored in the _________________________ before it exits the body.
11) ___________________________________________ is an example of a diuretic.
12) __________________________ is a kind of bone that forms between two
membranes. Some of the skull bones form in this fashion.
13) The _________________________ ribs have NO cartilage connection with the
sternum, but the are attached to the _______________________ vertebrae.
14) New red cells are produced in the ______________________________________.
15) Small, connective tissue bound bundles of muscle cells within a skeletal muscle
are known as____________________________________________.
16) Tendons attach bones to ___________________________________.
17) ____________________________ neurons take impulses from a sensory receptor
to the central nervous system.
Human Biology Exam 18 April 2005 2
Definitions: (21 Pts) Define the following terms.
21) Endochondral ossification
22) Latent Period
23) A Zone
24) Nodes of Ranvier
Human Biology Exam 18 April 2005 3
Short Answers. (25 Pts) Answer the following questions – drawings may help.
25) Our heroine, Winston, has been shrunk so that she is the size of a molecule of
sugar and injected into the renal artery. Her mission is to get out of the
circulatory system through the urinary system. List the structures that Winston
will pass by on her way out.
26) Gub-gub, our comic relief is also shrunk – but only down to the size of a red
blood cell. Starting in the renal artery, list the structure Gub-gub will pass
through on his way to the renal vein.
Human Biology Exam 18 April 2005 4
27) After you break a bone, the body repairs the damage in a series of four steps. List
the four steps and provide a brief explanation of each.
28) Define motor unit.
a. Where would you expect to find large and small motor units?
29) List the three stages of urine formation and briefly describe each.
Human Biology Exam 18 April 2005 5
Essay: (15 Pts) Answer the following question with as much detail as possible
30) Starting with the binding of Acetylcholine to the sarcolemma, describe the steps
that lead to contraction in skeletal muscle.
a. Why does rigor mortis happen?
31) Bonus – Where can Dr. Jensen put his big toe?
32) Where do lobster pee from?
Human Biology Exam 18 April 2005 6