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Biology S3 ( Unit One ) > Homeostatsis > Flashcards

Homeostatsis Flashcards

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1
Q

What is homeostasis

A

The regulation of the internal environment regardless of external environment is called homeostasis

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2
Q

What is hypothalamus

A

Its the body’s temperature monitoring centre

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3
Q

Hypothalamus is sensitive to what

A

Nerve impulses

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4
Q

(Hypothalamus) Information is communicated by e______ impulses through nerves to effectors, which being about responses to return t_______ to n_____

A

Electrical
Temperature
Normal

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5
Q

What is our ideals core temperature for a human is…?

A

37oC

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6
Q

What can happen if your body is too hot

A

Can cause heatstroke

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7
Q

What can happen if your body is too cold

A

Hypothermia

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8
Q

What do mammals and birds eat large quantities of to fuel their central heating systems

A

Energy rich food

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9
Q

The ability to maintain a constant temperature involves what?

A

Homeostasis

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10
Q

What’s the largest organ in the body

A

Skin

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11
Q

What are the responses to an increase in temperature include

A

Sweating
Skin blood vessels dilate ( blood diverted to the skin )
Hairs on skin relax
Reduce metabolic rate

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12
Q

Why dose sweating help you cool down

A

Message are sent to the sweat glands resulting in increased sweat production.
Heat energy form the body will convert the water into sweat to water vapour.
This lowers the body temperature

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13
Q

Vasodilation helps cool down because

A

Blood capillaries in the skin dilate, increasing blood flow to the skin this increases the heat lost by radiation

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14
Q

Why dose decreased metabolic rate help you cool down

A

Metabolic reactions generate heat decreasing the rate reduces heat production

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15
Q

What responses dose your body do to increase your body temperature

A

Shivering
Hairs stands up
Blood vessels constrict ( blood is diverted away from the skin)
Increase in metabolic rate

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16
Q

Shivering helps you heat up why

A

Rapid involuntary contractions of skeletal muscles generates heat

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17
Q

Why dose Vasoconstriction help you heat up

A

Blood capillaries in the skin constrict, decreasing blood flow to the skin this decreases heat loss by radiation

18
Q

What is thermoregulation

A

This is the regulation of body temperature so that it stays at a set point of 37oC

19
Q

If the body temperature falls too low then biological reaction may happen….

A

to slow for cells to survive

20
Q

What cells are may be damaged if your body temperature rises too high

A

Enzymes and other cell proteins

21
Q

Why dose Contraction of hair erector muscles help you heat up

A

Tis traps a layer of warm air at the skin that acts as extra insulation ( goosebumps )

22
Q

Do you sweat more when it is warm

A

Yes

23
Q

Dose the shunt vessel dilate when it’s warm or cold

A

Cold

24
Q

What are voluntary responses when the environment is hot

A

Removing clothes
Taking a cold drink
Opening a window

25
Q

What are voluntary responses when the environment is cold

A

Putting on extra clothes
Having a hot drink.
Turning up the heating

26
Q

When dose hypothermia occur

A

When your body temperature falls below 35oC

27
Q

If hypothermia is left untreated what can it eventually lead to

A

Heart failure
Respiratory system failure
death

28
Q

When dose blood glucose rise

A

After eating

29
Q

What is the name for too much glucose

A

Hyperglycaemia

30
Q

Which type of diabetes is an autoimmune disease
A. Type 1
B. Type 2

A

A

31
Q

I what Are the symptoms of diabetes for type one and type two

A

Increase urination
Throat
Obesity
Kidney damage
Blindness
Amputation ( diabetics foot )

32
Q

What’s the name when you have not enough glucose

A

Hypoglycaemia

33
Q

What are the symptoms of having not enough glucose

A

Sweating
Anxiety
tremor
confusion
Dizziness
Hunger
Coma

34
Q

Blood sugar levels are controlled by h_____ that are secreted by the p_____

A

Hormones
Pancreas

35
Q

What is the hormone called that is produced by the body to maintain normal blood glucose levels

A

Insulin

36
Q

What dose your body do when in sense a rise in blood sugar

A

-Rise in blood sugar detected by pancreas
- pancreas produces insulin
- Insulin converts excess glucose to glycogen, which is stored in the liver

37
Q

What happens when your body senses a drop in blood sugar

A
  • Drop in blood sugar detected by pancreas
  • pancreas produces glucagon
  • glucagon converts glycogen stored in liver back to glucose
38
Q

What is stored In The liver

A

Glycogen

39
Q

What number of things are produced by the pancreas ( Bonus question name them )

A

Glucagon and insulin

40
Q

Which organ detects changed in blood glucose concentration

A

Pancreas

41
Q

Describe the level of blood glucose that woud cause:
A) glycogen to be converted to glucose
B) glucose being converted to glycogen

A

A) glucose levels fall
B) glucose levels rise

42
Q

What is the hypothalamus sensitive to

A

Nerve impulses

Biology S3 ( Unit One ) (12 decks)

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