Animal Coordination, Control and Homeostasis | Edexcel GCSE Combined Science Biology, Higher tier (1SC0)

Animal Coordination, Control and Homeostasis

112 questions
7 subtopics
Paper 2
Paper 2

Animal Coordination, Control and Homeostasis is examined in Paper 2, Biology 2.

It covers hormones, endocrine glands and homeostasis, adrenalin, thyroxine and negative feedback, the menstrual cycle and its hormones, hormonal and barrier contraception, clomifene and IVF, blood glucose control and type 1 diabetes, and type 2 diabetes and body mass.

Sample questions from Animal Coordination, Control and Homeostasis

Answer each one closed book first, then open the answer.

Hormones, endocrine glands and homeostasis

Which organ lying behind the stomach releases hormones that control blood glucose?

Show the answer
The pancreas.
Hormones, endocrine glands and homeostasis

Name three conditions inside the body that are kept constant.

Show the answer
Body temperature, the concentration of glucose in the blood, and the water content of the blood.
Adrenalin, thyroxine and negative feedback

Which organ does adrenalin act on to raise blood sugar, and what conversion does it cause there?

Show the answer
The liver, where stored glycogen is converted into glucose that passes into the blood.
Adrenalin, thyroxine and negative feedback

Which part of the brain responds to a fall in thyroxine, and what does it release?

Show the answer
The hypothalamus responds, and it releases TRH.
The menstrual cycle and its hormones

Which hormone causes the lining of the uterus to thicken, and where is it made?

Show the answer
Oestrogen, which is made in the ovaries.
The menstrual cycle and its hormones

Which structure releases progesterone during the second half of the menstrual cycle?

Show the answer
The corpus luteum, which forms from the empty follicle left behind in the ovary.
Hormonal and barrier contraception

Name three ways of giving hormonal contraception other than a daily pill.

Show the answer
By injection, by an implant placed under the skin, or by a patch worn on the skin.
Hormonal and barrier contraception

Give two advantages of hormonal contraception.

Show the answer
It is very effective when used correctly and it does not interrupt sex.

The 7 subtopics

One subtopic is one session. Work down the list.

Subtopic	What it covers	Questions
Hormones, endocrine glands and homeostasis	Hormones as chemical messengers carried in the blood to target organs with specific receptors, the pituitary, thyroid, pancreas, adrenal glands, testes and ovaries and what they release, homeostasis and the changes it responds to, and receptors, coordination centres and effectors.	15
Adrenalin, thyroxine and negative feedback	How adrenalin from the adrenal glands prepares the body for fight or flight by raising heart rate, blood pressure, blood flow to the muscles, blood glucose and breathing rate, thyroxine and metabolic rate, and negative feedback control of thyroxine through TRH and TSH.	16
The menstrual cycle and its hormones	The stages of the 28-day menstrual cycle from menstruation to ovulation, oestrogen thickening and progesterone maintaining the uterus lining, the roles of FSH and LH from the pituitary gland and progesterone from the corpus luteum, and how these hormones interact to control ovulation and start the next cycle.	17
Hormonal and barrier contraception	How oestrogen and progesterone in hormonal contraception prevent pregnancy, pills, injections, implants and patches, condoms and diaphragms as barrier methods, the advantages and disadvantages of each, and what perfect-use and typical-use effectiveness figures show.	14
Assisted reproductive technology and IVF	Assisted reproductive technology, clomifene therapy and how it raises FSH and LH to trigger ovulation, the stages of IVF and why FSH and LH are given, and why IVF often fails and the risk of multiple pregnancy.	8
Controlling blood glucose, and type 1 diabetes	How the pancreas releases insulin to lower blood glucose by storing it as glycogen, why levels rise after meals and fall in exercise, glucagon raising blood glucose and working antagonistically with insulin by negative feedback, and the cause, onset, symptoms and insulin treatment of type 1 diabetes.	20
Type 2 diabetes and body mass	The cause and risk factors of type 2 diabetes, how it differs from type 1 and is controlled, calculating body mass index and waist to hip ratio and their limits, correlation and cause, and scatter diagrams showing positive, negative or no correlation with lines of best fit.	22

Animal Coordination, Control and Homeostasis is 112 of the 968 questions in the guide.Get the guide, £7

How the guide is worked

Answering a question from memory stores it far better than reading the answer again. The guide runs that as a fixed procedure on one subtopic at a time, about twenty minutes a session.

Step 1 · Closed book
Cover the answers. Work through one subtopic and write down what you can. Leave blanks where you have nothing.
Step 2 · Open book
Go back to the top. Read each printed answer and write it out in full, including the ones you had right.
Step 3 · Closed book again
Same questions, same order, from memory. The gap between pass one and pass three is the session result.

Read the full method, the return schedule and the research behind it.