CHAPTER 14- HOMEOSTASIS 🤎 Flashcards

Question 1

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explain the meaning of homeostasis, state four importances of homeostasis in animals

Question 2

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state the meaning of internal stimuli and explain how four external stimuli affect the body

Question 3

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define negative feedback, explain a negative feedback control loop including all necessary information and key words (internal and external stimuli + receptors + effectors)

Question 4

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explain the difference between negative and positive feedback

Question 5

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define coordination systems, state and describe two coordination systems in mammals

Question 6

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summarise then explain in detail, where and how urea is produced using keywords or diagrams if necessary

Question 7

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AS LEVEL RECAP: explain how carbon dioxide is eliminated from the body as a waste product

Question 8

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Using the diagram in your notes, label the seven parts of the kidney
-Describe the structure, functions or both of the labelled parts of the kidney

Question 9

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What is a nephron? Using the diagram in your notes, identify six parts of the nephron along with it’s associated blood vessels and structures
-Describe the structure, functions or both of these parts of a nephron

Question 10

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Using photomicrographs and electron micrographs in your notes, identify parts of the nephron along with it’s associated blood vessels and structures

Question 11

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Briefly summarise the two stages that take place to form urine and where they take place

Question 12

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Describe and explain the process of ultrafiltration IN DETAIL
-State and explain how three different factors affect the glomerular filtration rate

Question 13

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Describe and explain the process of selective reabsorption IN DETAIL

Question 14

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Relate the structure of the Bowman’s capsule and proximal convoluted tube to their functions in the formation of urine

Question 15

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Through description, show your understanding of osmoregulation and osmoreceptors

Question 16

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Explain the role of the hypothalamus, posterior pituitary gland antidiuretic hormone (ADH), aquaporins and collecting ducts in osmoregulation, use diagrams if necessary and explain how ADH performs it’s function IN DETAIL

Question 17

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Describe the different substances, tissues or cells involved in the control of blood glucose

Question 18

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AS LEVEL- explain the pathway of cell signaling in three steps

Question 19

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Using a diagram, explain IN DETAIL what happens when blood glucose sugar increases. Use keywords in your explanation

Question 20

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Using a diagram, summarise then explain IN DETAIL what happens when blood glucose sugar decreases. Use keywords in your explanation

Question 21

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With reference to relevant enzymes, explain IN DETAIL how test strips and biosensors are used to measure the concentration of glucose in blood and urine

Question 22

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Briefly explain the role of the stomata and state how they carry out this role

Question 23

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Describe the relationship between the structure and function of guard cells

Question 24

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Elaborate on the opening and closing of the stomata IN DETAIL with reference to rhythms

Question 25

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Describe the mechanism by which guard cells open and close the stomata IN DETAIL

Question 26

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IN DETAIL, describe the role of abscisic acid (ABA) in the closure of the stomata during times of water stress