A2 Booklet 4- Muscles and Homeostasis

Question 1

What is homeostasis?

Answer 1

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Question 2

What is the structure of skeletal muscle?

Answer 2

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Question 3

What is the structure of a muscle fibre?

Answer 3

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Question 4

What is the ultrastructure of skeletal muscle?

Answer 4

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Question 5

How does a relaxed muscle fibre look?

Answer 5

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Question 6

How does a tensed muscle fibre look?

Answer 6

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Question 7

How do actin and myosin work together in muscle fibres?

Answer 7

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Question 8

What is the mechanism of muscle contraction?

Answer 8

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Question 9

What is the structure of the neuromuscular junction?

Answer 9

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Question 10

How does transmission across a neuromuscular junction happen?

Answer 10

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Question 11

What are the differences between slow twitch and fast twitch muscle fibres?

Answer 11

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Question 12

How is ATP provided during muscle contraction?

Answer 12

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Question 13

What is the phosphocreatine system?

Answer 13

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Question 14

Describe the graph with energy on the y axis, time on x, has ATP, Creatine phosphate, anaerobic and aerobiv metabolism.

Answer 14

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Question 15

Describe Anaerobic respiration and Aerobic respiration and why they are suited to specific exercise

Answer 15

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Question 16

What is meant by the term antagonistic?

Answer 16

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Question 17

What is antagonistic muscle action?

Answer 17

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Question 18

What different features are maintained in homeostasis?

Answer 18

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Question 19

Why is a stable core temperature important?

Answer 19

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Question 20

Why is a stable blood pH important?

Answer 20

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Question 21

Why is a stable blood glucose concentration important?

Answer 21

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Question 22

Why is a stable water potential of blood important?

Answer 22

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Question 23

How is an increase in blood glucose controlled?

Answer 23

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Question 24

How is a decrease in blood glucose controlled?

Answer 24

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Question 25

What is a negative feedback mechanism? What triggers it? Draw the diagram

Answer 25

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Question 26

How is adrenaline controlled?

Answer 26

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Question 27

What are the two types of diabetes? How do they differ? How are they treated?

Answer 27

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Question 28

How does osmoregulation work?

Answer 28

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Question 29

What parts of the kidney do what in osmoregulation?

Answer 29

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Question 30

What is ultrafiltration?

Answer 30

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Question 31

What is the function of the proximal convoluted tubule?

Answer 31

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Question 32

What is the function of the loop of Henle?

Answer 32

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Question 33

What happens at the distal convoluted tube and collecting duct?

Answer 33

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Question 34

What happens with a decrease if water potential in the blood?

Answer 34

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Question 35

What happens with a increase if water potential in the blood?

Answer 35

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Question 36

What is positive feedback?

Answer 36

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