IB Biology HL Option A Quiz 2

Which is the correct sequence in the transmission of a neural impulse?

• axon, dendrite, cell body, synapse
• dendrite, axon, cell body, synapse
• synapse, axon, dendrite, cell body
• dendrite, cell body, axon, synapse

In a resting state, the axon is...

• depolarized, with mostly negatively charged ions outside and positively charged ions inside.
• depolarized, with mostly positively charged ions outside and  negatively charged ions inside.
• polarized, with mostly negatively charged ions outside and positively charged ions inside.
• polarized, with mostly positively charged ions outside and  negatively charged ions inside.

A neuron will  generate action potentials when it...

• remains below its threshold
• receives an excitatory input
• receives more excitatory than inhibitory inputs
• is stimulated by a neurotransmitter 

I am a relatively fast-acting chemical messenger that influences movement, learning, attention, and emotion. What am I?

• dopamine
• a hormone
• melatonin
• glutamate

Melissa has just completed running a marathon. She is so elated that she feels little fatigue or discomfort. Her lack of pain is probably the result of the release of...

• ACh
• endorphins
• dopamine
• norepinephrine

Tags

NGSS.HS-LS1-3

I am a relatively fast-acting chemical messenger that affects mood, hunger, and arousal. What am I?

• acetylcholine
• dopamine
• norepinephrine
• serotonin

Since Malcom has been taking a drug prescribed by his doctor, he no longer enjoys the little pleasures of life, such as eating and drinking. His doctor explains that this is because the drug...

• triggers the release of dopamine.
• inhibits the release of dopamine.
• triggers the release of ACh.
• inhibits the release of ACh.

The effect of a drug that is an antagonist is to 

• cause the brain to stop producing a certain transmitter
• mimic a particular transmitter
• block a particular transmitter
• disrupt a neuron's firing pattern

Of the following, the best way to separate the effects of genes and environment in research is to study

• fraternal twins
• identical twins
• adopted children and their adoptive parents
• identical twins raised in different environments

Heartbeat, digestion, and other self-regulating bodily functions are governed by the 

• voluntary nervous system
• autonomic nervous system
• sympathetic division of autonomic nervous system
• somatic nervous system

Tags

NGSS.HS-LS1-3