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Biology 30
Module 2
Assignment 9
Copyright: Ministry of Education, Saskatchewan
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Biology 30
301
Assignment 9
Biology 30
302
Assignment 9
Biology 30
303
Assignment 9
Biology 30
304
Assignment 9
Assignment 9
Values
(30)
A.
Multiple Choice: Select the best answer for each of the following and
place a () beside it.
1.
*** is both an endocrine and an exocrine gland.
____
____
____
____
2.
4.
Biology 30
Thymus
Pancreas
Liver
Adrenal
Hypoglycemia, or low blood sugar, can be corrected by the actions
of two hormones. One hormone is epinephrine or adrenalin and
the other is ***.
____
____
____
____
3.
a.
b.
c.
d.
a.
b.
c.
d.
glycogen
glucagon
insulin
thyroxin
"Target" cells or organ(s) are those which ***.
____
____
a.
b.
____
c.
____
d.
are actually exposed to hormones
are "directed" by the hypothalamus to produce
hormones
have special receptor molecules to attach to particular
hormones
have been "programmed" to shut down when exposed
to hormones
The most accurate, general statement about the functions of
hormones is that they ***.
____
____
____
a.
b.
c.
____
d.
help to regulate body processes
speed up metabolic rates
enable cells and bodies to make proper use of ingested
nutrients
control the growth or development rates of bodies
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Assignment 9
5.
A link between the nervous system and the endocrine system
occurs in the posterior pituitary and also in the *** gland.
____
____
____
____
6.
7.
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a.
b.
c.
d.
thyroid
adrenal
pancreas
pineal
The (negative) feedback control among glands and hormones can
be illustrated by using the thyroid gland and its production of
thyroxin (or thyroxine) as an example. Which of the following
represents the correct sequence of events that should occur if the
blood thyroxin level becomes too high?
____
a.
____
b.
____
c.
____
d.
Inhibition of hypothalamus  less stimulation of
pituitary gland  less thyroid-stimulating hormone 
less thyroxin.
Stimulation of hypothalamus  inhibition of pituitary
gland  less thyroid-stimulating hormone  less
thyroxin.
Stimulation of hypothalamus  stimulation of
pituitary gland  more thyroid-inhibiting hormone 
less thyroxin.
Inhibition of hypothalamus  stimulation of pituitary
gland  more thyroid-inhibiting hormone  less
thyroxin.
A tiger salamander hatches and then lives in water which is
deficient in iodine. It is likely that such a salamander will ***.
____
____
a.
b.
____
c.
____
d.
not be able to reproduce
not be able to undergo metamorphosis and leave the
larval stage
function normally, but actions will be slowed down
and life span will be increased
die very quickly
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Assignment 9
8.
The appearance of secondary sexual characteristics, or the onset of
puberty, is started by the release of gonadotrophic hormones from
the ***.
____
____
____
____
9.
a.
b.
c.
d.
cerebrum
pons
hypothalamus
cerebellum
a.
b.
c.
d.
needs light to stimulate its production
must work with another hormone
causes a gland to produce another hormone
has an inhibiting rather than a stimulating effect
Regulation of body processes in most invertebrates is controlled
mainly by ***.
____
____
____
____
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FSH begins decreasing
there is an increase in LH
progesterone and estrogen begin declining
progesterone reaches its peak while estrogen is
declining
A trophic or tropic hormone is one which ***.
____
____
____
____
12.
a.
b.
c.
d.
The area of the brain which appears to be equally associated with
both hormone control and nervous control is the ***.
____
____
____
____
11.
thyroid
hypothalamus
pituitary
gonads
Menstruation begins when ***.
____
____
____
____
10.
a.
b.
c.
d.
a.
b.
c.
d.
neurosecretory cells
nerves
hormones
sense receptors on the skin
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Assignment 9
13.
14.
Carbon-dioxide functions like a hormone in a human body when
***.
____
a.
____
b.
____
c.
____
d.
An excess of insulin will ***.
____
____
____
____
15.
Biology 30
it is released into blood capillaries surrounding the
cells that it is produced in
its increased concentration in the blood stimulates a
breathing control center in the brain to send out
"instructions" for faster breathing
it is able to pass through cell membranes by simple
diffusion
it is able to travel to the alveoli of the lungs and reduce
the permeability of those cell membranes
a.
b.
c.
d.
lead to cretinism
result in Diabetes mellitus
result in Diabetes insipidus
lower blood glucose levels
The menstrual or reproductive cycle of some primates, including
humans, is largely controlled by ***.
____
____
____
a.
b.
c.
____
d.
photoperiods
nerves of the autonomic system
interaction between nerves of the autonomic system
and hormones
interaction among hormones
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Assignment 9
(10)
B.
The Endocrine System
In the space below, write the name of the gland or body part which
matches or suits each of the following statements. Some may be used
more than once, or not all.
Chose from the following glands:
Pineal, pituitary, thyroid, parathyroid, thymus, adrenal, pancreas, ovary,
testes
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
The gland whose removal soon after birth causes a body to
have reduced immunity or resistance to disease.
A synthetic hormone is sometimes prescribed for overweight
people. This hormone matches one which normally
accelerates body metabolism and is produced here.
This often becomes swollen or enlarged in an attempt to
make more iodine.
Could be considered as "second-in-command" of the entire
endocrine system. The "master gland".
Location of the corpus luteum.
Giantism would most likely result by an overactivity here.
While not obvious in humans, in other animals this seems to
regulate the time when reproduction occurs during the year.
Has a connection to the nervous system so that rapid
responses can be initiated in times of stress.
Some athletes induce extra muscle development by taking
substances which match the natural hormones produced
here.
Responsible for increasing calcium levels in the blood.
a.
f.
b.
g.
c.
h.
d.
i.
e.
j.
f.
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Assignment 9
C.
(14)
Biology 30
Short Answer
1.
a.
Distinguish between an exocrine and an endocrine gland
and give one example of each.
b.
If some glands do not have tubes connecting them to other
body areas, how do their secretions move about?
c.
The hypothalamus of the brain is not an endocrine gland.
Yet it is very important and is often referred to when
discussing endocrine glands. Why is the hypothalamus so
important?
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Assignment 9
(6)
Biology 30
2.
d.
Some hormones or glands are regulated by a (negative)
feedback system. In general terms, explain what this means.
a.
Briefly describe what Diabetes mellitus is, including what
causes it.
b.
How do hormones contribute to homeostasis?
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Assignment 9
(10)
3.
a.
“The pituitary will send out a hormone (Hormone 1) that will
tell a specific organ or gland to produce another hormone
(Hormone 2) to do a specific function.”
Some of the hormones that the pituitary sends out are given
below. In the first column, fill in which organ/gland the
hormone is sent to. In the second column, indicate which
hormone that gland/organ has been “told” to produce.
Hormone 1 sent out
by pituitary
Gland/Organ it is
sent to
Hormone 2/secretion
that is produced
LH (in males)
TSH
FSH (in females)
LH (in females)
ACTH
(5)
b.
Antidiuretic hormone (ADH) and oxytocin are hormones
that are released by the posterior pituitary. In the following
chart give the organ that each hormone is sent to. In the
second column give the activity that the hormone initiates.
Hormone
Target Organ
Function
ADH
oxytocin
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Assignment 9
4.
(10)
Scientific News Article: Find two articles that are biology related
in a newspaper or magazine or on the internet. These articles
should be current – within the last year. (Do not use articles from
National Geographic). Submit either the original article or a copy
of it. Answer the following questions relating to each article.
(Space for Scientific Article 2 is given on the next page.)
Scientific Article 1
1.
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a)
Title of the Article:
b)
Author of the Article:
c)
Date and Source of the Article:
2.
What area of biology does this article apply to?
3.
What did you learn from this article?
4.
How does this article apply to me living in Saskatchewan
Canada?
5.
What aspect of this article would you like to learn more
about?
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Assignment 9
(10)
Scientific Article 2
1.
a)
Title of the Article:
b)
Author of the Article:
c)
Date and Source of the Article:
2.
What area of biology does this article apply to?
3.
What did you learn from this article?
4.
How does this article apply to me living in Saskatchewan
Canada?
5.
What aspect of this article would you like to learn more
about?
_____
(95)
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Assignment 9