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Homeostasis

Total questions: 64

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

What is an example of a positive feedback mechanism?

a)
b)
2.
The two types of feedback systems that help organisms maintain homeostasis are:
a)
positive and negative 
b)
receptor and effector
c)
static and dynamic
d)
minor and major
3.
Maintaining body temperature is an example of a:
a)
negative feedback loop
b)
positive feedback loop
4.
The term for maintaining internal temperature is: 
a)
Thermoregulation
b)
Thermometer
c)
Homeothermal
d)
Homeostasis
5.
Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
6.
If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
7.
When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. 
a)
Positive Feedback Response
b)
Negative Feedback Loop 
8.
Homeostasis
a)
allows for a wildly fluctuating internal environment
b)
is impossible in vertebrates
c)
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
d)
is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation
9.
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
10.
Which system sends electrical messages that helps control the body's responses to internal and external changes?
a)
nervous
b)
endocrine
c)
reproductive
d)
integumentary
11.

What hormone is produced in the pancreas that lowers blood sugar?

a)

Insulin

b)

Glucagon

c)

Ketones

d)

Glucose

12.
These two body systems regulate feedback mechanisms.
a)
Skeletal & Muscular
b)
Skeletal & Endocrine
c)
Muscular & Nervous
d)
Endocrine & Nervous
13.

Homeostatic cooling mechanisms include

a)

piloerection and panting

b)

panting and vasoconstriction

c)

sweating and piloerection

d)

sweating and vasodilation

14.

The liver normally stores blood sugar as

a)

glucose

b)

glycogen

c)

glucagon

d)

fats

15.

The hormone that makes the liver store sugars is

a)

glucose

b)

glycogen

c)

glucagon

d)

insulin

16.

Tissue fluid balance is maintained by the

a)

bladder

b)

kidney

c)

liver

d)

urine

17.

The kidney needs to control the blood levels of

a)

cobalt

b)

potassium

c)

phosphorus

d)

nitrogen

18.

High blood sugar levels after a meal usually stimulate

a)

Glucagon release from the liver

b)

Glucagon release from the pancreas

c)

Insulin release from the liver

d)

Insulin release from the pancreas

19.

The action of insulin causes

a)

The liver to secrete enzymes

b)

The liver to make glycogen

c)

The liver to make glucose

d)

none of these

20.

After a period of fasting the brain makes the pancreas produce

a)

glucose

b)

glycogen

c)

glucagon

d)

insulin

21.

Glycogen is a

a)

hormone

b)

short term protein

c)

sugar stored in the liver

d)

sugar stored in the liver and muscles

22.

After a period of strenuous exercise you may need to

a)

drink tea

b)

drink water with electrolytes

c)

drink a high energy drink

d)

drink water

23.
The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called
a)
osmosis.
b)
simple diffusion.
c)
active transport.
d)
passive transport.
24.
The "cause" for something to happen is the
a)
response
b)
effect
c)
stimulus
d)
homeostasis
25.

Salt water crocodiles bask in the sun for several hours every morning. which one of the following statements best describes the method of thermoregulation in salt water crocodiles?

a)

Endothermy, increase body temperature to increase rate of metabolism reactions in cells

b)

Ectothermy, decrease body temperature to increase rate of metabolic reactions in cells.

c)

Endothermy, decrease body temperature to increase rate of metabolic reactions in cells

d)

Ectothermy, increase body temperature to increase rate of metabolic reactions in cells

26.

The rate of metabolism in body cells is controlled by hormones called thyroid-stimulating hormone (TSH) and thyroxine (T4). Which best describes the negative feedback loop of these hormones?

a)

The concentration of T4 in the blood is low, the pituitary gland decreases the production of TSH.

b)

The concentration of T4 in the blood is low, the pituitary gland increases the production of TSH.

c)

The concentration of T4 in the blood is high, the pituitary gland increases the production of TSH.

d)

The concentration of T4 in the blood is high, the pituitary gland does not raise or lower the production of TSH.

27.

What is the role of Neurotransmitters?

a)

Chemical signals that pass nerve signals on to the next neuron

b)

Electrical signals that pass nerve signals on to the next neuron

c)

Hormone signals that pass nerve signals on to the next neuron

d)

Receptors that pass nerve signals on to the next neuron

28.

What is a Osmoconformer?

a)

An organism that tightly regulate their internal osmolarity independently of the enviroment

b)

An organism that have the same osmolarity as their environment

29.

What is the function of the Thyroid gland

a)

Hormones that are used to change the metabolic rate of a person's body

b)

Hormones that are used to help you run

c)

Hormones to help you swallow

d)

Penguin

30.

Why do you get warmer when exercising?

a)

You are creating more ATP from glucose which releases heat as a byproduct

b)

blood is flowing faster through your body

c)

it's warm where you're working out

31.

These are responses when body temperature drops

a)

thyroid releases TSH to increase metabolic rate, shivering, hairs stand up, vasoconstriction

b)

pancreas releases insulin, shivering, hairs flatten, vasodilation

c)

thyroid releases TSH to decrease metabolic rate, shivering, hairs flatten, vasoconstriction

d)

pancreas releases insulin, sweating, hairs flatten, vasodilation

32.

Insulin increases cell permeability to glucose by translocating _____ to the plasma membrane

a)

GLUT1

b)

GLUT2

c)

GLUT3

d)

GLUT4

33.
The correct order for the renal tubules is:
a)
proximal convoluted tubule, collecting duct, distal convoluted tubule, loop of Henle
b)
distal convoluted tubule, loop of Henle, proximal convoluted tubule, collecting duct
c)
proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct
d)
collecting duct, proximal convoluted tubule, loop of Henle, distal convoluted tubule
34.
Urine production takes place in the:
a)
nephrons
b)
bladder
c)
ureter
d)
renal pelvis
35.
In homeostasis, the kidney regulates the:
a)
levels of electrolytes 
b)
amount of water in the body
c)
pH
d)
all of the above
36.
What is the first step in the formation of urine?
a)
Filtration
b)
Secretion
c)
Output
d)
Reabsorbtion
37.
The substances secreted directly are ammonia, hydrogen ions, potassium ions, and ________.
a)
Lactose
b)
Fructose
c)
Drugs
d)
Odors
38.

What is part "B"?

a)

Bowman's capsule

b)

Renal corpuscle

c)

Glomerulus

d)

Loop of Henle

39.

What is part "C"?

a)

Glomerulus

b)

Afferent arteriole

c)

Renal corpuscle

d)

Collecting duct

40.

What is part "D"?

a)

Proximal convoluted tubule

b)

Distal convoluted tubule

c)

Loop of Henle

d)

Collecting duct

41.

What is part "F"?

a)

Loop of Henle

b)

Bowman's capsule

c)

Efferent arteriole

d)

Collecting duct

42.

Which of these products are NEVER filtered out of the blood?

a)

Blood cells

b)

Water

c)

Salt

d)

Nutrients

43.

Which of these products are filtered from the blood and NOT reabsorbed?

a)

Nitrogenous waste (urea)

b)

Blood cells

c)

Water

d)

Glucose

44.

ADH is created in the:

a)

Hypothalamus

b)

Posterior Pituitary Gland

c)

Brain

d)

Kidney

45.

ADH is released from the pituitary gland into the:

a)

Circulatory system

b)

Endocrine system

c)

Nervous system

d)

All of the above

46.

When ADH is secreted, urine will:

a)

Be more dilute

b)

Be more concentrated

c)

Have a larger volume

d)

All of the above

47.

Changes in blood volume and concentration are detected in the brain cells in the:

a)

Posterior Pituitary Gland

b)

Anterior Pituitary Gland

c)

Thalamus

d)

Hypothalamus

48.

Abscisic Acid (ABA) is a plant hormone that assists in osmoregulation by:

a)

Regulating stomatal closure

b)

Causing plants to secrete a waxy layer

c)

Regulating vacuole storage

d)

All of the above

49.

What are the functions of stomata cells?

(Select all that apply)

a)

Allowing plants to take in CO2

b)

Providing the cell with energy

c)

Reducing water loss

d)

Cell reproduction

e)

Gas exchange

50.

What type of plants are best suited to dry/arid environments?

a)

Xerophytes

b)

Sophytes

c)

Hydrophytes

d)

Mesophytes

51.

Xerophytes face desert conditions and thus have the following adaptations

a)

Waxy cuticles designed to repel water

b)

Pneumatophores or 'breathing roots' that protrude form the surface of the ground

c)

Stomata that are present in high numbers

d)

An outer surface covered in fine hairs

52.
Insulin is secreted by:
a)
α-cells in the Islets of Langerhans
b)
β-cells in the Islets of Langerhans
c)
β-cells in the pancreatic medulla
d)
α-cells in the pancreatic cortex
53.
Glucagon is secreted by:
a)
α-cells in the Islets of Langerhans
b)
β-cells in the Islets of Langerhans
c)
β-cells in the pancreatic medulla
d)
α-cells in the pancreatic cortex
54.
The hormone secreted by the adrenal medulla in response to a stressor is:
a)
Aldosterone
b)
Cortisol
c)
Epinephrine
d)
ACTH
55.
Hormones that enter cells directly to cause changes are usually:
a)
Steroids
b)
Proteins
56.
The second messenger produced by the action of many protein hormones is:
a)
cAMP
b)
Adenylate Cyclase
c)
G-Protein
d)
Epinephrine
57.
What do you call it when two neurons communicate through neurotransmitters?
a)
Hormones
b)
Synapse
c)
Cholesterol
d)
Monty
58.
What do second messengers do?
a)
transport a signal through the lipid bilayer
b)
relay a signal from the outside to the inside of the cell
c)
relay message from the inside of the mebrane throughout the cytoplasm
d)
dampen the message
59.
Signal amplification is most often achieved by
a)
an enzyme cascade
b)
binding of multiple signals
c)
branching pathways
d)
action of adenylyl cyclase
60.
The 3 steps of signal transduction in order are
a)
reception, transduction, response
b)
response, transduction, reception
c)
reception, response, transduction
d)
transduction, reception, response
61.
The process of removal of the body’s wastes is called
a)
gas exchange.
b)
respiration.
c)
excretion.
d)
filtration.
62.

Which of the following is more toxic than

others?

a)

Water

b)

Urea

c)

Ammonia

d)

Uric acid

e)

Glucose

63.

Three phases of urine formation are:

a)

filtration, formation and secretion

b)

formation, reabsorbtion and secretion

c)

excretion, secretion and reabsorbtion

d)

filtration, reabsorbtion and secretion

64.

Blood appears in a person's urine.


Which of the following could contribute to this happening?


I. Very high blood pressure

II. Damage to the Bowman's capsule

III. Damage to the proximal coiled tubule

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

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