Ch 13 and 15 mini quiz

What are the two major types of glutamate receptors?

• Nicotinic and Muscarinic

• AMPA and NMDA

• GABA and Glycine

• Dopamine and Serotonin

What is associative strengthening?

• Strengthening of all synapses in a neuron regardless of timing

• Strengthening of a synapse due to repeated weak stimulation alone

• Strengthening of a synapse when it fires simultaneously with a strongly stimulated synapse

• Weakening of a synapse due to lack of stimulation

What happens to AMPA receptors during LTP?

• Their single-channel conductance increases, and more are recruited to the synaptic membrane

• They change conformation and respond to new ligands

• They get dephosphorylated and removed from the synapse

• Their conductance decreases

What is the name of the region in the sarcomere that contains only thick filaments and no actin filaments?

• A-band

• I-band

• Z-line

• H-zone

Which protein primarily makes up the thick filaments in a sarcomere?

• Troponin

• Titin

• Actin

• Myosin

What is the role of the ryanodine receptor in muscle contraction?

• It detects voltage changes and opens to allow sodium influx.

• It acts as a ligand-gated channel that releases calcium upon binding acetylcholine.

• It transports calcium back into the T-tubule after contraction.

• It transports calcium into the sarcoplasm when activated by the DHPS receptor.