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Biology quiz #3: The brain and nervous system

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Quiz by biologykquiz
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Last updated: April 25, 2014
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First submittedJanuary 20, 2014
Times taken1,570
Average score25.0%
Rating3.86
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Hint
Answer
Which part of the brain is in control of the higher brain functions such as conscious thought?
Cerebrum
The brain and spinal cord make up the...
Central nervous system (CNS)
Which part of the brain controls the body's homeostatic mechanisms, such as core body temperature regulation?
Hypothalamus
What type of motor neurone carries impulses to the skeletal muscles (which are voluntary)?
Somatic
What type of motor neurone in the PNS is mostly non-myelinated?
Autonomic
Which type of autonomic motor neurone is most active during sleep and relaxation?
Parasympathetic
Which part of the brain controls heart rate and breathing?
Medulla oblongata
Which type of autonomic motor neurone is most active during times of stress?
Sympathetic
How many sodium ions do the sodium-potassium pumps pump out of the cell for every 2 potassium ions pumped into the cell?
3
What is the potential difference across the axon membrane of a resting neurone called?
Resting potential
Hint
Answer
What is the value of this potential difference (inside the cell compared to outside)?
-60mV
What type of cell surrounds axons to form the myelin sheath?
Schwann cell
What are the gaps between these cells called?
Nodes of Ranvier
What neurotransmitter is released by sympathetic neurones?
Noradrenaline
What is the name given to the way that an action potential appears to jump from one node of Ranvier to another?
Saltatory conduction
What is the movement of ions along the neurone called?
Local current
What is the name of the pressure receptors in the skin?
Pacinian corpuscles
What is the name of the period after an action potential has been stimulated during which another action potential cannot be stimulated?
Refractory period
What neurotransmitter is released by parasympathetic neurones?
Acetylcholine
From which part of the brain is ADH secreted?
Posterior pituitary gland
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1 Comments
KoiFish
+2
Level 76
Mar 24, 2021
A couple things: norepinephrine should be accepted for noradrenaline, resting membrane potential varies (I learned it as -70 mV, but it depends on the neuron location, maybe add a few type-ins).
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