E Nervous System

Which statement about temperature receptors found in the skin is true?

• All temperature receptors found in skin are connected to sensory neurones.

• All temperature receptors found in skin are directly connected to motor neurones.

• Nervous impulses from these temperature receptors always trigger a reflex action via motor neurones before reaching the brain.

• Nervous impulses are sent from the relay neurones to the sensory neurones in the brain to allow us to sense temperature changes in the environment.

Which statement is true about neurones?

• Relay neurones transmit nerve impulses from the brain to sensory neurones.

• Sensory neurones can transmit impulses directly to the brain.

• Motor neurones transmit nerve impulses directly to brain via the reflex arc.

• Relay neurones transmit nerve impulses from sensory neurones to motor neurones in the reflex arc.

Which part of this cell receives impulses from the relay neurone?

• A

• B

• C

• D

Synapses with the effector can be found at ____________.

• A

• B

• C

• D

Which statement about neurotransmitters is true?

• Neurotransmitters are produced by glands and they are transported to nerve cells through the bloodstream.

• Neurotransmitters transmit nerve impulses from one neurone to another neurone.

• Neurotransmitters are produced and released by dendrites.

• Neurotransmitters are produced only at the motor neurone.

Mark decides to take a walk barefooted on the beach at noon. He jumps when his feet comes into contact with the hot sand.

In what sequence are the neurones activated to cause this reaction?

• Sensory neurone > motor neurone > relay neurone

• Sensory neurone > relay neurone > motor neurone

• Motor neurone > relay neurone > sensory neurone

• Motor neurone > sensory neurone > relay neurone

Which row correctly identifies the components of a reflex arc?

• A

• B

• C

• D

Which of the following is not a reflex action?

• Stretching out your hand to shake another person’s hand

• Salivating when you smell your favourite food being cooked

• Blinking and tearing when dust enters your eyes

• Sneezing when pollen grains enter and irritate your nasal tract

Which statement about the direction of nerve impulse transmission is true?

• Nerve impulses can be transmitted directly from the sensory neurone to the motor neurone in the reflex arc.

• Nerve impulses can be transmitted directly to the brain via motor neurones.

• Nerve impulses can be transmitted from the brain to the sensory neurone.

• Nerve impulses can be transmitted along the relay neurone to the brain.

An involuntary response never involves the brain.

• True

• False

• None of what I do ever involves the brain.