Exam (elaborations)
ASU BIO 181 EXAM 3 QUESTIONS WITH COMPLETE SOLUTIONS 2024/2025
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ASU BIO 181 EXAM 3 QUESTIONS WITH COMPLETE SOLUTIONS 2024/2025
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ESTUDYASU BIO 181 EXAM 3 QUESTIONS WITH
COMPLETE SOLUTIONS 2024/2025
**1. True or False: Excitatory synapses make the post-synaptic cell less likely to fire.**
- A) True
- B) False
✔✔ **Answer**: B) False.
---
**2. Which of the following are neural tissues?**
- A) Heart, liver, brain
- B) Stomach, intestines, pancreas
- C) Spinal cord, sensory neurons, brain
- D) Muscles, bones, ligaments
✔✔ **Answer**: C) Spinal cord, sensory neurons, brain.
---
**3. How do glial cells (like the myelin sheath) speed up neuron firing?**
- A) By making neurons fire slower
- B) By wrapping a fatty insulating substance around axons
- C) By removing ions from the axons
,ESTUDY
- D) By stopping the firing of neurons
✔✔ **Answer**: B) By wrapping a fatty insulating substance around axons.
---
**4. The action potential is the result of:**
- A) A chemical reaction
- B) The movement of ions
- C) The production of hormones
- D) A buildup of fat
✔✔ **Answer**: B) The movement of ions.
---
**5. True or False: Receptors are made from membrane-bound polyribosomes.**
- A) True
- B) False
✔✔ **Answer**: A) True.
---
**6. Which are the four types of glial cells and their functions?**
, ESTUDY
- A) Microglia: cleans up cellular debris, Astrocytes: support and repair neurons, Schwann Cells:
myelinate axons in the PNS, Satellite Cells: form the brain-blood barrier
- B) Microglia: cause inflammation, Astrocytes: produce hormones, Schwann Cells: absorb nutrients,
Satellite Cells: move ions around the body
- C) Microglia: block neuron signals, Astrocytes: support muscle growth, Schwann Cells: support
metabolism, Satellite Cells: help with digestion
- D) Microglia: clean toxins, Astrocytes: send signals, Schwann Cells: block signals, Satellite Cells: aid in
breathing
✔✔ **Answer**: A) Microglia: cleans up cellular debris, Astrocytes: support and repair neurons,
Schwann Cells: myelinate axons in the PNS, Satellite Cells: form the brain-blood barrier.
---
**7. True or False: Acetylcholine is exocytosed from the presynaptic cell to start the action potential in
the postsynaptic cell.**
- A) True
- B) False
✔✔ **Answer**: A) True.
---
**8. True or False: When the presynaptic cell contacts a muscle cell, the synapse is called a motor end
plate.**
- A) True
- B) False
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