Which row in the table describes the type of neurone and the direction of the impulse correctly?

Here are the solutions to the questions:

3. The following diagram shows a structure which is found in the human body. This structure is an example of...

The diagram shows a human eye. An eye is a complex structure made up of different tissues (like nervous tissue, muscle tissue, connective tissue) that work together to perform a specific function (vision). This level of organization is defined as an organ.

The correct option is A.
$\boxed{\text{A. an organ}}$

4. Which organ in the human body is responsible for forming urea?

Urea is a waste product formed from the breakdown of amino acids. This process, known as the urea cycle, primarily occurs in the liver. The kidneys then filter the urea from the blood and excrete it in urine, but they do not produce it.

The correct option is C.
$\boxed{\text{C. liver}}$

5. The diagram shows a neurone which carries impulses in the human body. Which row in the table describes the type of neurone and the direction of the impulse correctly?

The diagram shows a multipolar neuron, which is characteristic of motor neurons and interneurons. The arrow indicates the direction of impulse from the cell body/dendrites along the axon.

• A motor neuron (efferent neuron) carries impulses away from the central nervous system (CNS) to effectors (muscles or glands). Its cell body is typically located in the CNS, and the impulse travels out along its axon.
• A sensory neuron (afferent neuron) carries impulses towards the central nervous system from receptors.

Given the typical morphology shown (multipolar neuron) and the direction of impulse from the cell body along the axon, this represents a motor neuron carrying an impulse away from the central nervous system.

The correct option is B.
$\boxed{\text{B. motor, away from the central nervous system}}$