The chart below illustrates the stages of the oestrus cycle of a cow - English General - NSC Agricultural Sciences - Question 4 - 2016 - Paper 1
Question 4
The chart below illustrates the stages of the oestrus cycle of a cow.
4.1.1 Write down the letter (A–D) of the stage where the following takes place:
(a) Increased ... show full transcript
Worked Solution & Example Answer:The chart below illustrates the stages of the oestrus cycle of a cow - English General - NSC Agricultural Sciences - Question 4 - 2016 - Paper 1
Step 1
4.1.1 (a) Increased vaginal and cervical mucus production
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Answer
C
Step 2
4.1.1 (b) Rapid growth of follicles
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Answer
B
Step 3
4.1.1 (c) Corpus luteum regresses if no fertilisation occurred
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Answer
A
Step 4
4.1.2 (a) Starts to decrease from a higher to a lower level
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Answer
Oestrogen
Step 5
4.1.2 (b) Reaches its highest level
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Answer
Luteinising hormone
Step 6
4.1.3 Give the role of the hormone in QUESTION 4.1.2(b).
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Answer
The luteinising hormone is responsible for the rupture of the membrane of the Graafian follicle and initiates ovulation.
Step 7
4.1.4 Name the stage of the oestrus cycle represented by B.
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