Co-ordination & Response Practice Questions

Name the parts of the brain labelled A and B on Figure 1.

The part labelled C is the medulla oblongata. State one function of the medulla oblongata.

Name the structures labelled A and B on Figure 2.

Structure C is the retina. State the function of the retina.

State the function of the iris.

Name the parts of the pathway labelled 1 and 2.

State where in the body the relay neurone is found.

Give one advantage to the student of dropping the tray as a reflex action.

Cone cells are found in the retina. Name the part of the eye that light passes through first before it reaches the retina.

At dusk, a gardener can see the shapes of the flowers in her garden but cannot tell what colour they are. Explain why.

Some people have red–green colour blindness. Give the cause of red–green colour blindness.

Explain why it is difficult for doctors to investigate brain tissue directly in a living patient.

A CT scan uses X-rays. Describe the information a CT scan gives a doctor about a patient's brain.

Explain how a PET scan gives different information from a CT scan.

Name the parts labelled X and Y on Figure 3.

Explain how part Y is adapted to the function of the neurone.

Give two ways in which the structure of a sensory neurone is different from the motor neurone shown in Figure 3.

Describe how an electrical impulse is passed from one neurone to the next neurone at a synapse.

A drug blocks the receptor molecules on the membrane of the second neurone. Explain the effect this drug has on the transmission of impulses.

Describe the pathway of this reflex action, from stimulus to response.

Explain why this reflex action is described as rapid and automatic.

Complete the table to show what happens in the eye when focusing on a distant object and on a near object. Write your answers for (i), (ii) and (iii).

As people get older the lens becomes less elastic. Explain why many older people find it difficult to read small print held close to their face.

Describe what happens in the iris to change the size of the pupil in the bright sunshine.

Explain why this change is important for the eye.

Name the eye defect shown in Figure 4.

Give two reasons why a person may have the defect shown in Figure 4.

State the type of lens used in glasses to correct this defect.

A different patient is told she has cataracts. Describe how cataracts are corrected.

Calculate the mean distance fallen for the non-dominant hand.

Calculate the percentage increase in the mean distance fallen when the non-dominant hand was used. Give your answer to 1 decimal place.

The student concluded that 'everyone has a slower reaction time with their non-dominant hand'. Evaluate this conclusion.

Explain why doctors have only limited success in treating patients such as X and Y.

Calculate the time taken for an impulse to travel 1.2 m along neurone A. Give the unit.

Calculate how much longer an impulse would take to travel the same distance of 1.2 m along neurone B.

Explain, in terms of its structure, why an impulse travels faster along neurone A than along neurone B.