Test: Homeostasis (biology)


HomeostasisVersion en ligne Take this 20 question multiple choice quick quiz to test your knowledge of this topic. You only have 5 lives! par Richard Limb 1 Homeostasis operates by employing mechanisms of a Negative feedback b Positive feedback c Negative and positive feedback d None of the above 2 Homeostasis is involved in the control of a Body temperature and water balance b Glucose levels and body temperature c Glucose levels, body temperature and water balance d Glucose levels and water balance 3 Which statement is true regarding ectothermic and endothermic organisms and how they maintain their body temperatures? a Ectotherms rely on mechanisms of homeostasis, endotherms rely on behaviour b Ectotherms rely on behaviour, endotherms rely on mechanisms of homeostasis c Both ectotherms and endotherms rely on behaviour d Both ectotherms and endotherms rely on mechanisms of homeostasis 4 Which factors are continuously adjusted in regard to tissue fluid? a Temperature and concentration b Acidity and concentration c Acidity and temperature d Acidity, concentration and temperature 5 What is the importance of homeostasis with regard to enzymes? a Enzymes are kept at their pH and temperature minimums, and denaturation is promoted b Enzymes are kept at their pH and temperature optimums and denaturation is prevented c Enzymes are kept at their pH and temperature minimums and denaturation is prevented d Enzymes are kept at their pH and temperature maximums and denaturation is promoted 6 Which is a true description of hyperthermia and hypothermia? a Hyperthermia occurs above normal body temperature, hypothermia occurs below b Hyperthermia occurs below normal body temperature, hypothermia occurs above c Both hypothermia and hyperthermia occur below normal body temperature d Both hypothermia and hyperthermia occur above normal body temperature 7 The organ of homeostasis for temperature control is the a Liver b Kidney c Lungs d Skin 8 In which layers are pressure receptors in the skin found? a Epidermis only b Dermis only c Epidermis and dermis d Adipose layer and epidermis 9 The function of a sebaceous gland is to a Detect environmental stimuli b Produce sweat which cools the body down c Produce oil which keeps the skin supple and prevents cracking d Produce hormones involved in temperature regulation 10 To produce a cooling effect, arterioles in the skin undergo a Vasoconstriction, so more heat is lost b Vasodilation, so less heat is lost c Vasoconstriction, so less heat is lost d Vasodilation, so more heat is lost 11 Which 4 changes occur in overcooling of the skin? a Contraction of erector pili muscles, hair stands upright, reduced sweat production, vasoconstriction of arterioles b Relaxation of erector pili muscles, hair lies flat, increased sweat production, vasodilation of arterioles c Contraction of erector pili muscles, hair lies flat, increased sweat production, vasoconstriction of arterioles d Relaxation of erector pili muscles, hair stands upright, decreased sweat production, vasodilation of arterioles 12 Negative feedback mechanisms are mechanisms that a Maintain processes in the body above normal limits b Maintain processes in the body below normal limits c Return processes in the body to normal limits d Fluctuate processes in the body between an upper and lower limit 13 Which 4 changes occur in overheating of the skin? a Relaxation of erector pili muscles, hair stands upright, increased sweat production, vasoconstriction of arterioles b Contraction of erector pili muscles, hair stands upright, increased sweat production, vasoconstriction of arterioles c Contraction of erector pili muscles, hair lies flat, reduced sweat production, vasodilation of arterioles d Relaxation of erector pili muscles, hair lies flat, increased sweat production, vasodilation of arterioles 14 In overheating of the skin, what happens to metabolic rate and why? a Metabolic rate increases so more heat is produced from aerobic respiration b Metabolic rate decreases so less heat is produced from aerobic respiration c Metabolic rate increases so less heat is produced from aerobic respiration d Metabolic rate decreases so more heat is produced from aerobic respiration 15 The two principal organs involved in the control of blood sugar are the a Liver and kidney b Pancreas and liver c Pancreas and kidney d None of the above 16 During high glucose levels in the blood a Glucagon is released from the pancreas b Insulin is released from the liver c Insulin is released from the pancreas d Glucagon is released from the liver 17 Which one describes the target organ and effect of glucagon during low blood glucose levels? a Liver and causes glycogen to be converted back to glucose b Pancreas and causes glycogen to be converted back to glucose c Liver and causes glucose to be stored as glycogen d Pancreas and causes glucose to be stored as glycogen 18 Which statement describes correctly the symptoms of Type I diabetes? a Decreased urine production, soft bones, blindness, low blood glucose levels b Sweet smelling breath, hair loss, cracked skin and anaemia c Rickets, loss of smell, high blood glucose levels, stomach ulcers d Excessive thirst, sweet smelling breath, blurred vision, tiredness 19 Which statement correctly describes the long-term effects of Type 1 diabetes? a Heart disease, emphysema, stroke, dementia, gum disease b Cataracts, sore muscles, kidney problems, anaemia, breathlessness c Heart disease, cataracts, stroke, kidney problems, nerve damage d Blindness, loss of smell, heart palpitations, hair loss, skin rashes 20 Which is an example of an antibiotic-resistant species of bacteria and what can be done to prevent this happening? a T.pallidum and always use the same antibiotic b S.aureus and use antibiotics in very low concentrations c E.coli and always use high doses of antibiotics d MRSA and use antibiotics only when essential

1

Homeostasis operates by employing mechanisms of

a

Negative feedback

b

Positive feedback

c

Negative and positive feedback

d

None of the above

2

Homeostasis is involved in the control of

a

Body temperature and water balance

b

Glucose levels and body temperature

c

Glucose levels, body temperature and water balance

d

Glucose levels and water balance

3

Which statement is true regarding ectothermic and endothermic organisms and how they maintain their body temperatures?

a

Ectotherms rely on mechanisms of homeostasis, endotherms rely on behaviour

b

Ectotherms rely on behaviour, endotherms rely on mechanisms of homeostasis

c

Both ectotherms and endotherms rely on behaviour

d

Both ectotherms and endotherms rely on mechanisms of homeostasis

4

Which factors are continuously adjusted in regard to tissue fluid?

a

Temperature and concentration

b

Acidity and concentration

c

Acidity and temperature

d

Acidity, concentration and temperature

5

What is the importance of homeostasis with regard to enzymes?

a

Enzymes are kept at their pH and temperature minimums, and denaturation is promoted

b

Enzymes are kept at their pH and temperature optimums and denaturation is prevented

c

Enzymes are kept at their pH and temperature minimums and denaturation is prevented

d

Enzymes are kept at their pH and temperature maximums and denaturation is promoted

6

Which is a true description of hyperthermia and hypothermia?

a

Hyperthermia occurs above normal body temperature, hypothermia occurs below

b

Hyperthermia occurs below normal body temperature, hypothermia occurs above

c

Both hypothermia and hyperthermia occur below normal body temperature

d

Both hypothermia and hyperthermia occur above normal body temperature

7

The organ of homeostasis for temperature control is the

a

Liver

b

Kidney

c

Lungs

d

Skin

8

In which layers are pressure receptors in the skin found?

a

Epidermis only

b

Dermis only

c

Epidermis and dermis

d

Adipose layer and epidermis

9

The function of a sebaceous gland is to

a

Detect environmental stimuli

b

Produce sweat which cools the body down

c

Produce oil which keeps the skin supple and prevents cracking

d

Produce hormones involved in temperature regulation

10

To produce a cooling effect, arterioles in the skin undergo

a

Vasoconstriction, so more heat is lost

b

Vasodilation, so less heat is lost

c

Vasoconstriction, so less heat is lost

d

Vasodilation, so more heat is lost

11

Which 4 changes occur in overcooling of the skin?

a

Contraction of erector pili muscles, hair stands upright, reduced sweat production, vasoconstriction of arterioles

b

Relaxation of erector pili muscles, hair lies flat, increased sweat production, vasodilation of arterioles

c

Contraction of erector pili muscles, hair lies flat, increased sweat production, vasoconstriction of arterioles

d

Relaxation of erector pili muscles, hair stands upright, decreased sweat production, vasodilation of arterioles

12

Negative feedback mechanisms are mechanisms that

a

Maintain processes in the body above normal limits

b

Maintain processes in the body below normal limits

c

Return processes in the body to normal limits

d

Fluctuate processes in the body between an upper and lower limit

13

Which 4 changes occur in overheating of the skin?

a

Relaxation of erector pili muscles, hair stands upright, increased sweat production, vasoconstriction of arterioles

b

Contraction of erector pili muscles, hair stands upright, increased sweat production, vasoconstriction of arterioles

c

Contraction of erector pili muscles, hair lies flat, reduced sweat production, vasodilation of arterioles

d

Relaxation of erector pili muscles, hair lies flat, increased sweat production, vasodilation of arterioles

14

In overheating of the skin, what happens to metabolic rate and why?

a

Metabolic rate increases so more heat is produced from aerobic respiration

b

Metabolic rate decreases so less heat is produced from aerobic respiration

c

Metabolic rate increases so less heat is produced from aerobic respiration

d

Metabolic rate decreases so more heat is produced from aerobic respiration

15

The two principal organs involved in the control of blood sugar are the

a

Liver and kidney

b

Pancreas and liver

c

Pancreas and kidney

d

None of the above

16

During high glucose levels in the blood

a

Glucagon is released from the pancreas

b

Insulin is released from the liver

c

Insulin is released from the pancreas

d

Glucagon is released from the liver

17

Which one describes the target organ and effect of glucagon during low blood glucose levels?

a

Liver and causes glycogen to be converted back to glucose

b

Pancreas and causes glycogen to be converted back to glucose

c

Liver and causes glucose to be stored as glycogen

d

Pancreas and causes glucose to be stored as glycogen

18

Which statement describes correctly the symptoms of Type I diabetes?

a

Decreased urine production, soft bones, blindness, low blood glucose levels

b

Sweet smelling breath, hair loss, cracked skin and anaemia

c

Rickets, loss of smell, high blood glucose levels, stomach ulcers

d

Excessive thirst, sweet smelling breath, blurred vision, tiredness

19

Which statement correctly describes the long-term effects of Type 1 diabetes?

a

Heart disease, emphysema, stroke, dementia, gum disease

b

Cataracts, sore muscles, kidney problems, anaemia, breathlessness

c

Heart disease, cataracts, stroke, kidney problems, nerve damage

d

Blindness, loss of smell, heart palpitations, hair loss, skin rashes

20

Which is an example of an antibiotic-resistant species of bacteria and what can be done to prevent this happening?

a

T.pallidum and always use the same antibiotic

b

S.aureus and use antibiotics in very low concentrations

c

E.coli and always use high doses of antibiotics

d

MRSA and use antibiotics only when essential

Homeostasis

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Homeostasis

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HomeostasisVersion en ligne

par Richard Limb

Homeostasis operates by employing mechanisms of

Homeostasis is involved in the control of

Which statement is true regarding ectothermic and endothermic organisms and how they maintain their body temperatures?

Which factors are continuously adjusted in regard to tissue fluid?

What is the importance of homeostasis with regard to enzymes?

Which is a true description of hyperthermia and hypothermia?

The organ of homeostasis for temperature control is the

In which layers are pressure receptors in the skin found?

The function of a sebaceous gland is to

To produce a cooling effect, arterioles in the skin undergo

Which 4 changes occur in overcooling of the skin?

Negative feedback mechanisms are mechanisms that

Which 4 changes occur in overheating of the skin?

In overheating of the skin, what happens to metabolic rate and why?

The two principal organs involved in the control of blood sugar are the

During high glucose levels in the blood

Which one describes the target organ and effect of glucagon during low blood glucose levels?

Which statement describes correctly the symptoms of Type I diabetes?

Which statement correctly describes the long-term effects of Type 1 diabetes?

Which is an example of an antibiotic-resistant species of bacteria and what can be done to prevent this happening?