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5 Written questions

5 Matching questions

  1. Essential Nutrients
  2. Hyperpolarization
  3. Graded Potential
  4. Myelinated Sheath
  5. Sarcoplasmic Reticulum
  1. a In a neuron, a shift in the membrane potential that has an amplitude proportional to signal strength and that decays as it spreads.
  2. b A specialized endoplasmic reticulum that regulates the calcium concentration in the cytosol of muscle cells
  3. c A substance that an organism cannot synthesize from any other material and therefore must absorb in preassembled.
  4. d A change in a cell's membrane potential such that the inside of the membrane becomes more negative relative to the outside. Hyperpolarization reduces the chance that a neuron will transmit a nerve impulse.
  5. e Wrapped around the axon of a neuron, an insulating coat of cell membranes from Schwann cells or oligodendrocytes. It is interrupted by nodes of Ranvier, where action potentials are generated

5 Multiple choice questions

  1. The membrane potential characteristic of a nonconducting excitable cell, within the inside of the cell more negative than the outside
  2. The regulatory protein that control the position of tropomyosin on the thin filament.
  3. An efferent branch of the vertebrate peripheral nervous system that regulates the internal environment; consists of the sympathetic, parasympathetic, and enteric divisions.
  4. The short time immediately after an action potential in which the neuron cannot respond to another stimulus, owing to the inactivation of voltage-gated sodium channels
  5. ...

5 True/False questions

  1. Sympathetic DivisionOne of the tree divisions of the autonomic nervous system; generally increases energy expenditure and prepares the body for action (Fight or Flight) - causes increase in heart rate, breathing, slows digestion, liver releases glucose, inhibits emptying of bladder, releases adrenaline from adrenal medulla situations:(emergency, embarrassment, exercise, excitement)


  2. Tropic Hormones...


  3. Basal Metabolic Rate (BMR)The metabolic rate of a resting, fasting and non stressed endotherm at a comfortable temperature.


  4. Parasympathetic DivisionOne of the three divisions of the autonomic nervous system, generally enhances body activities that gain and conserve energy, such as digestion and reduced heart-rate, decrease breathing, storing glycogen for energy in the liver


  5. Interstitial FluidOne of the three divisions of the autonomic nervous system; consists of networks of neurons in the digestive tract, pancreas, and gall bladder; normally regulated by the sympathetic and parasympathetic divisions of the autonomic nervous system. (secretions + peristalsis can function independently from parasympathetic and sympathetic but can also be affected by it)