Exam 3: BIO210 / BIO 210 (Latest
2024 / 2025 Update) Anatomy and Physiology for Science Majors I Exam | Questions and Verified Answers | 100% Correct | Grade A - GCU
Question:
which ion is present in higher concentration inside the cell
Answer:
potassium
Question:
which ion is present in higher concentration outside of the cell
Answer:
sodium
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Question:
which ion is responsible for depolarization
Answer:
sodium
Question:
which ion is responsible for repolarization
Answer:
potassium
Question:
nondecremental
Answer:
action potentials do not get weaker with distance
Question:
ionotropic receptors
Answer:
ligand-gated receptors for small ions with no second messenger
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Question:
metatropic receptors
Answer:
G-protein coupled receptors
Question:
second messenger
Answer:
enzyme produced to open/close other cell receptors
Question:
excitatory neurotransmitters
Answer:
promotes AP, causes depolarization
Question:
inhibitory neurotransmitters
Answer:
suppresses AP, causes hyperpolarization
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Question:
EPSP
Answer:
Na and Ca are driven into the cell making the membrane potential more positive
Question:
IPSP
Answer:
potassium is driven out, chloride is driven into the cell, and the membrane potential is more negative
Question:
temporal summation
Answer:
high frequency from one presynaptic neuron
Question:
spatial summation
Answer:
high frequency from many presynaptic neurons
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