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Bio 1b Midterm 2 Animals Test

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5 Written Questions

5 Matching Questions

  1. Myelinated Sheath
  2. Nervous Tissue
  3. Actin
  4. Basal Metabolic Rate (BMR)
  5. Interstitial Fluid
  1. a 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
  2. b ...
  3. c The fluid filling the spaces between cells in most animals
  4. d Tissue made up of neurons and supportive cells.
  5. e The metabolic rate of a resting, fasting and non stressed endotherm at a comfortable temperature.

5 Multiple Choice Questions

  1. A specialized endoplasmic reticulum that regulates the calcium concentration in the cytosol of muscle cells
  2. The regulatory protein that blocks the myosin-binding sites on actin molecules
  3. A gated channel for a specific ion. The opening or closing of such a channels may alter a cell's membrane potential.
  4. An extension of the hypothalamus composed of nervous tissue that secretes oxytocin and antidiuretic hormone made in the hypothalamus, temporary storage site for these hormones.
  5. 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 True/False Questions

  1. EPSP (Exitatory post-synaptic potential)An electrical change (depolarization) in the membrane of a post-synaptic cell caused by the binding of an excitatory neurotransmitter from a presynaptic cell to a post-synaptic cell; makes it more likely for a post-synaptic cell to generate an action potential.

          

  2. Nodes of RanvierA gated channel for a specific ion. The opening or closing of such a channels may alter a cell's membrane potential.

          

  3. Complete Proteins...

          

  4. Nontropic HormonesA hormone that has an endocrine gland or cells as a target.

          

  5. Graded PotentialIn a neuron, a shift in the membrane potential that has an amplitude proportional to signal strength and that decays as it spreads.

          

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