Biology Form 4 KSSM Topic 12

Front

What is the correct sequence of impulse transfer in nerve cells P, Q, and R?

Back

R -> P -> Q

Front

What is true about the pathway of an impulse in a reflex arc?

Back

N contract causes the finger to react.

Front

What is the function of the axon of a sensory neurone?

Back

To carry impulse away from the cell body.

Front

What causes the decrease in blood glucose level 3 hours after a meal?

Back

Insulin.

Front

What is the correct sequence for reflex action involving structures P, Q, R, and S?

Back

Q -> R -> S -> P.

Front

Define a sensory neurone.

Back

A nerve cell that transmits sensory information from receptors to the central nervous system.

Front

What is the role of neurotransmitters in nerve impulse transmission?

Back

They transmit signals across the synaptic cleft between neurons.

Front

Explain the function of the spinal cord in reflex actions.

Back

It processes reflex actions and transmits signals between the brain and the body.

Front

What is a reflex arc?

Back

A neural pathway that controls a reflex action.

Front

Define the term 'axon'.

Back

The long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body.