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Bio 181 ASU exam 3 Questions & Answers 2024.
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Bio 181 ASU exam 3 Questions & Answers 2024.
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Bio 181 ASU exam 3 Questions & Answers2024
T or F: Potassium ions are at high concentrations inside of cells, including neurons -
CORRECT ANSWER-True
The action potential is a result of: - CORRECT ANSWER-the movement of ions
The post-synaptic cell can be: - CORRECT ANSWER-in glands, muscle cells and
neurons
Th resting potential of a neuron is - CORRECT ANSWER--60mV
T or F: The cell body refers to the part of the neurons that begin at the dendrites and
extend to the axon terminal - CORRECT ANSWER-false
T or F: Voltage gated ion channels open when a protein binds to the receptor -
CORRECT ANSWER-false
T or F: Excitatory synapses cause hyperpolarization of post-synaptic cells - CORRECT
ANSWER-false
T or F: Acetylcholinesterase breaks acetylcholine into muscarinic acid - CORRECT
ANSWER-false
In the motor end plate, the event that is the immediate trigger for exocytosis is -
CORRECT ANSWER-calcium ions
T or F: Fast Neurons as described in lecture require cytoplasmic signal transduction to
open an ion channel. - CORRECT ANSWER-False
T or F: Only pre-synaptic neurons are coated with myelin. - CORRECT ANSWER-False
T or F: When the presynaptic cell contacts a muscle cell, the synapse area is called a
motor end plate. - CORRECT ANSWER-True
T or F: Receptors are made from membrane-bound polyribosomes. - CORRECT
ANSWER-True
, The terminal web: - CORRECT ANSWER-is a site of exocytosis
T or F: Excitatory synapses cause depolarization of the post-synaptic cell - CORRECT
ANSWER-True
T or F: The membrane potential (resting potential) is largely set by the Na-K- ATPase
pump. - CORRECT ANSWER-true
The neural tissues are: - CORRECT ANSWER-spinal cord, sensory neurons and brain
T or F: the axon from a pre-synaptic cell contacts the axon of another neuron -
CORRECT ANSWER-false
T or F: The receptors in post-synaptic cells are the basis on which the synapse can be
defined as inhibitory or excitatory - CORRECT ANSWER-false
4 types of glial cells - CORRECT ANSWER-schwann, oligodendrocytes, astrocytess
and microglia
T or F: The axon hillock in the pre-synaptic neuron fires based on temporal and spatial
summation of inputs - CORRECT ANSWER-true
The central nervous contains - CORRECT ANSWER-spinal column and brain
T or F: Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic
cell to start the action potential in the postsynaptic cell. - CORRECT ANSWER-true
T or F: Fast neurons as described in lecture are fast because they are surrounded by a
type of glial cell that results in a myelin coating. - CORRECT ANSWER-false
T or F: Insulin is a ligand - CORRECT ANSWER-true
T or F: Vitamin D causes the parathyroid to inhibit new PTH synthesis - CORRECT
ANSWER-true
T or F: When the Sympathetic nervous system is triggered glycogen is broken down to
glucose to provide more energy. - CORRECT ANSWER-true
T or F: Insulin is produced by alpha cells - CORRECT ANSWER-false, beta cells
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