Biology 12

Unit 2 Review • MHR 213

MAKING CONNECTIONS

41.Sleep is a normal part of human life.
Investigate the neurological basis of sleep —
what happens in your nervous system when
you fall asleep and wake up? Find out why a
good night’s sleep is essential for good health.
For one week, keep track of the amount of
sleep you get each night. If possible, compare
your data with those of other people in your
class (including, perhaps, your teacher). What
percentage of your class gets eight hours of
sleep on an average night? Some studies show
that most North Americans are sleep-deprived.
What do you think are some of the social
implications of this?

42.Research the history of the medical definition
and treatment of schizophrenia. Is there a cure
for schizophrenia? What are the current medical
theories regarding the causes of this form of
mental illness? How common is schizophrenia
in Canada (as a percentage of the total
population)? Explain why there may be a
difference between the incidence of
schizophrenia in male and female populations
in Canada.

43.Compare the availability of effective treatment
programs for infectious diseases, such as
tuberculosis, in Canada and in developing
countries. How does the average incidence and
death rate for TB in Canada compare to those
of developing nations? To what extent does the
quality of medical care TB patients receive
depend on where they live? Should Canadians
be concerned about the incidence of various
infectious diseases, such as TB, in developing
countries? Why or why not?

44.Some common over-the-counter medications,
such as various types of analgesics, come with
warnings that their use by people with diabetes
should be restricted and monitored by a health
professional. Why should people with diabetes,
or others at risk for kidney disease, be especially
cautious about regular or repeated consumption
of such products? Should these products be
available by prescription only?

45.Many people obtain flu shots each year. What

are flu vaccines composed of and what type of

immunity do they provide to the recipient?

Why can’t a single flu vaccine injection provide

lifetime immunity? What are the health risks

associated with flu vaccinations? Currently, flu

vaccines are free for everyone in some provinces,

but in other provinces some people have to

pay. Find out what the eligibility rules are in a

province that does not provide free flu shots to

everyone. Should the flu vaccine be made

available free to all Canadians?

Consider the following as you continue to build your

biology research portfolio.

• Review the information you have gathered in
  preparation for the Biology Course Challenge.
  Consider any new findings to see if you want to
  change the focus of your project.


• Add important concepts, interesting facts, and
  diagrams from this unit.


• Scan magazines, newspapers, and information
  on the Internet to enhance your project.

COURSE CHALLENGE

right-brained individual? Explain your answer.

If possible, conduct a survey to determine the

number of people who consider themselves

to be left- or right-brained. Is such a survey

scientifically valid? Might it be used to predict

someone’s future academic performance?

40.Draw a reflex arc that involves reflexively

removing your foot after stepping on a sharp

object, such as a tack. Label each part of the

diagram and use arrows to show the direction

of nerve impulses along each nerve in the

reflex arc.