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Biology

Review Questions

BiologyReview Questions
4.

Neurons contain ________, which can receive signals from other neurons.

  1. axons
  2. mitochondria
  3. dendrites
  4. Golgi bodies
5.

A(n) ________ neuron has one axon and one dendrite extending directly from the cell body.

  1. unipolar
  2. bipolar
  3. multipolar
  4. pseudounipolar
6.

Glia that provide myelin for neurons in the brain are called ________.

  1. Schwann cells
  2. oligodendrocytes
  3. microglia
  4. astrocytes
7.

For a neuron to fire an action potential, its membrane must reach ________.

  1. hyperpolarization
  2. the threshold of excitation
  3. the refractory period
  4. inhibitory postsynaptic potential
8.

After an action potential, the opening of additional voltage-gated ________ channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential.

  1. sodium
  2. potassium
  3. calcium
  4. chloride
9.

What is the term for protein channels that connect two neurons at an electrical synapse?

  1. synaptic vesicles
  2. voltage-gated ion channels
  3. gap junction protein
  4. sodium-potassium exchange pumps
10.

The ________ lobe contains the visual cortex.

  1. frontal
  2. parietal
  3. temporal
  4. occipital
11.

The ________ connects the two cerebral hemispheres.

  1. limbic system
  2. corpus callosum
  3. cerebellum
  4. pituitary
12.

Neurons in the ________ control motor reflexes.

  1. thalamus
  2. spinal cord
  3. parietal lobe
  4. hippocampus
13.

Activation of the sympathetic nervous system causes:

  1. increased blood flow into the skin
  2. a decreased heart rate
  3. an increased heart rate
  4. increased digestion
14.

Where are parasympathetic preganglionic cell bodies located?

  1. cerebellum
  2. brainstem
  3. dorsal root ganglia
  4. skin
15.

________ is released by motor nerve endings onto muscle.

  1. Acetylcholine
  2. Norepinephrine
  3. Dopamine
  4. Serotonin
16.

Parkinson’s disease is a caused by the degeneration of neurons that release ________.

  1. serotonin
  2. dopamine
  3. glutamate
  4. norepinephrine
17.

________ medications are often used to treat patients with ADHD.

  1. Tranquilizer
  2. Antibiotic
  3. Stimulant
  4. Anti-seizure
18.

Strokes are often caused by ________.

  1. neurodegeneration
  2. blood clots or burst blood vessels
  3. seizures
  4. viruses
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