Deeper nervous and endocrine system anatomy and physiology review beyond the general HESI A2 Anatomy and Physiology deck.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- What produces the myelin sheath around axons in the CNS?
- Oligodendrocytes
- What produces the myelin sheath around axons in the PNS?
- Schwann cells
- The nodes of Ranvier are gaps in the myelin sheath that allow ____ conduction of nerve impulses.
- saltatory
- How many sodium and potassium ions does the sodium-potassium pump exchange per cycle?
- 3 sodium ions out, 2 potassium ions in
- What is the threshold potential of a neuron?
- The minimum membrane voltage that must be reached to trigger an action potential
- What is the refractory period of a neuron?
- The brief time after an action potential when the neuron cannot fire another one
- Which neurotransmitter is released at the neuromuscular junction?
- Acetylcholine
- What is the main inhibitory neurotransmitter in the CNS?
- GABA
- What is the main excitatory neurotransmitter in the CNS?
- Glutamate
- Which neurotransmitter is most associated with reward, motivation, and movement?
- Dopamine
- Which neurotransmitter helps regulate mood, appetite, and sleep?
- Serotonin
- Which neurotransmitter is released by sympathetic postganglionic neurons?
- Norepinephrine
- Which glial cells help form the blood-brain barrier?
- Astrocytes
- What is the function of the basal ganglia?
- Coordinate voluntary movement
- What does the limbic system control?
- Emotion and memory