Theory

CH15 - CONTROL AND CO-ORDINATION

(a) The steroid hormones oestrogen and progesterone are secreted by the ovary. State precisely the sites of secretion of each. oestrogen ................

2009 Summer

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 4.1 shows a section through a maize fruit.Fig. 4.1(i) Name the parts labelled A to D.A .........................................................

2009 Summer

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Hormones are secreted by endocrine glands.Explain what is meant by the term _endocrine gland_........................................................

2009 Winter

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Describe a reflex arc and explain why such reflex arcs are important. [7](b) Describe the structure of a myelin sheath and explain its role in the...

2009 Winter

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Fig. 5.1 shows a section through part of a human testis.Fig. 5.1Name structures A and B.A ...........................................................

2009 Winter

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Describe how a nerve impulse crosses a cholinergic synapse. [9](b) Explain the roles of synapses in the nervous system. [6]

2009 Winter

Theory

CH15 - CONTROL AND CO-ORDINATION

Follicle stimulating hormone (FSH) and luteinising hormone (LH) both consist of two polypeptide chains, the α and β chains.• The α chains of FSH ...

2010 Summer

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Describe the structure of a myelinated sensory neurone. [7](b) Explain how an action potential is transmitted along a sensory neurone. [8][Total: ...

2010 Summer

Theory

CH15 - CONTROL AND CO-ORDINATION

Follicle stimulating hormone (FSH) and luteinising hormone (LH) both consist of two polypeptide chains, the \( \alpha \) and \( \beta \) chains.The \(...

2010 Summer

Theory

CH15 - CONTROL AND CO-ORDINATION

(a) Describe the structure of a myelinated sensory neurone. [7] (b) Explain how an action potential is transmitted along a sensory neurone. [8] [Total...

2010 Summer

MCQ

CH1 - CELL STRUCTURE

A cell organelle measures $4 \times 10^{-1}$ mm in diameter.What is the diameter in $\mu$m?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

In the following table, which is the correct comparison between light and electron microscopes? [Table_1: light microscope and electron microscope co...

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which structures are present in a typical plant cell? [Table_1]

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Plant cells are stained and then viewed through a light microscope.Which structures would be clearly visible at a magnification of ×400?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which type of cell will contain the highest proportion of single membrane-bound structures?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Four different fruit juices, A, B, C and D, were tested with Benedict's solution. A second sample of each juice was hydrolysed and tested with Benedic...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which molecular bonds will be broken by hydrolysis when a molecule of glycogen is converted to glucose? [Table_1]

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which set of statements correctly describes haemoglobin?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Some foods contain 'hydrogenated vegetable oils'. These are unsaturated fats that have been converted to saturated fats.Which property of the fats wil...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which rows show the chemical groups present in the biological molecules listed?[Table_1]

2011 Summer