exercise physiology part I
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- Explain the resting membrane potential
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Sodium outside and
Potassium inside set up a -70 mV potential difference at the membrane - Describe an action potential.
- The threshold for depolarization at a spot on the cell membrane(reaches the lower threshold voltage Usually around -55 mV)
- What is an EPSP/IPSP?
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EPSP: Excitatory Post-Synaptic Potential
IPSP: Inhibitory Post –Synaptic Potential - What are the major divisions of the nervous system?
- CNS, PNS
- How do sympathetic and parasympathetic systems differ?
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Parasympathetic---rest and recovery
Sympathetic---Action. (Swing or sprint) fight or flight - Differentiate between a hormone and a neurotransmitter.
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Hormone is a chemical messenger released into the blood designed "to set in motion" a process.
Neurotransmitters are chemicals that are used to relay electrical signals between a neuron and another cell. Produced within the presynaptic neuron - What is the major difference between a steroid and peptide hormone?
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Steroids are lipid solable and steroid hormones are generally synthesized from cholesterol in the gonads and adrenal glands.
Peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine functions. Receptor dependent. - Which hormones are released during exercise to increase blood glucose?
- Glucagon
- Which hormone can be considered catabolic?
- catabolic hormones- cortisol, glucagon, epinephrine
- What effect does exercise training have on hormone release
- Increased
- What is required before an action potential is fired
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You must reduce the charge across the plasma membrane.
Certain neurotransmitters or mechanical stimuli (e.g., acetylcholine)will open ligand-gated sodium channels.
Usually around -55 mV.