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AQA Combined Science > AQA B5 > Flashcards

AQA B5 Flashcards

3 rounds

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1
Q

what doe Homeostasis mean?

A

Sustaining a stable internal environment

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2
Q

What happens when something in the body is to high or low?

A

Homeostasis uses Negative Feedback to bring them back to normal

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3
Q

What are the stages of negative Feedback?

A

Stimulus detected, Receptors, Sensory Neurons, CNS, Motor Neurons, Effectors

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4
Q

What is the Nervous System?

A

The Nervous system detects and reacts to stimuli

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5
Q

What does the Sensory Neurone do ?

A

Carries electrical impulses from receptors to CNS

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6
Q

What does the motor Neurone do ?

A

Carries electrical impulses from CNS to effectors

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7
Q

What are the effectors ?

A

All muscles and glands which respond to nervous impulses

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8
Q

What are receptors ?

A

Cells that detect stimulus

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9
Q

What are synapses ?

A

They connect between two neurons and transfer chemicals to each neuron

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10
Q

What are Reflexes ?

A

Reflexes help prevent injuries

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11
Q

How does the reflex arc pass information in a reflex ?

A

Receptors,Relay Neuron,Motor Neuron,Effectors

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12
Q

Where are all hormones produced ?

A

In the Endocrine Glands

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13
Q

Examples of Endocrine Glands:

A

Pancreas,Testes Adrenal Gland,Pituitary Glands

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14
Q

What hormones are produced in the Pancreas ?

A

Insulin

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15
Q

What hormones are produced in the Adrenal Glands

A

Adrenaline

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16
Q

What hormones are produced in the Testes ?

A

Testosterone

17
Q

What hormones are produced in Pituitary Glands

A

Many Hormones

18
Q

What controls Blood Glucose Levels ?

A

Insulin and Glucagon

19
Q

What is the use of Insulin ?

A

Removes glucose from blood

20
Q

When blood glucose levels are too low what needs to be done ?

A

Glucagon is added

21
Q

When blood levels are to high what needs to be done ?

A

Insulin is added

22
Q

What Hormones control the menstrual cycle ?

A

FSH- follice stimulating hormone
LH- luteinising hormone
Progesterone
Oestrogen

23
Q

What is a tissue ?

A

A group of similar cells working together perform a particular function

24
Q

What is an organ ?

A

A group of tissues that work together to carry out a particular function

25
Q

What is an organ system ?

A

A group of ogans working together to carry out a particular function

AQA Combined Science (2 decks)

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