Nervous System

You can smell a ripe peach on the table in front of you. What is the best explanation of this?

• Sensors in your nostrils can detect molecules on the surface of the peach

• The peach emits a type of gas that is attracted to sensors in your nostrils

• Molecules from the peach have gone into the air and then up your nostrils

• The peach emits smell rays that strike sensors in your nostrils

The part of the body containing all our smell receptors is the:

• Olfactory tract

• olfactory epithelium

• amygdala

• mucus

Olfactory receptor cells are a special type of:

• Gene

• Mucus

• Neuron

• Epithelium

Smells are good at triggering memories. What is the best explanation of this?

• Signals from the olfactory receptor cells travel directly to parts of the brain where memory is stored

• The olfactory receptor cells chemically encode a record of all smells previously encountered

• Memories are stored in the nostrils

• Signals from the olfactory receptor cells travel to a relay centre in the brain which forward them to parts where memory is stored

The central nervous system consists of:

• the front lobes of the brain

• all nerves in the body except those in the hands and feet

• all nerves in and between the sensory organs and the brain

• the brain and spinal cord

The peripheral nervous system consists of:

• Nerves that relay messages from sense organs to the brain and spine, plus nerves that connect from the brain and spine to the muscles and glands

• all the nerves in the body involved with smell

• only nerves that connect from the central nervous system to the muscles and glands

• nerves whose role is to coordinate messages from sense organs with responses in muscles and glands

You are thirsty on a hot day and someone offers you a drink. You see the drink and reach out to take it. This involves:

• just the peripheral nervous system, seeing the drink and activating your muscle

• The peripheral nervous system, which detects the drink and drives the muscles, and the central nervous system, which coordinates the two

• just the central nervous system, which identifies the drink and controls the muscles

• just the peripheral nervous system, activating your muscles

Cells that allow us to detect different types of stimuli are known as:

• Brain cells

• Skin cells

• Receptor cells

• Muscle cells

• Nerve cells (neurons)

You see your favourite chocolate bar in the store and reach for your money. The receptors responsible are:

• Photoreceptors

• Mechanoreceptors

• Pain receptors

• Chemoreceptors

• Thermoreceptors

The siren sounds at the end of a football match and your response is to cheer. The receptors responsible are:

• pain receptors

• mechanoreceptors

• chemoreceptors

• photoreceptors

• thermoreceptors