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Bio 161 - Exam 4

QuestionAnswer
Muscle Fiber an individual muscle cell
Fasicle a group of muscle cells within the belly of a muscle
Sacrolemma plasma membrane of skeletal muscle cells
Sacroplasm the cytoplasm of a skeletal muscle cell
Sacromere Contractile unit of a muscle cell that makes a myofibril
Sacroplasmic reticulum Modified endoplasmic reticulum that regulates calcium in the cell
T (transversal) Tubules Tubes continuous with the sarcolemma to increase surface area
Myofibril The major component of a muscle cell (takes up the most intracellular volume)
Myoglobin Oxygen-binding protein in a muscle cell
Multi - nucleate Term that means "containing many nuclei"
Epimysium Fibrous connective tissue that is continuous with the tendon
Which type of muscle cell(s) is (are) striated? Choose all that apply. Skeletal Cardiac Smooth Skeletal Cardiac
Skeletal muscle tends to contain short, branched cells. True False False
The neuromuscular junction (or synapse) involves which of the following two cell types? neuron:neuron neuron:skeletal muscle neuron:adipocytes neuron:smooth mucles neuron:skeletal muscle
Which of the following neurotransmitters are released at the neuromuscular junction? dopamine calcium acetylcholine acetylcholine esterase acetylcholine
What type of channels bind to acetylcholine in the post-synaptic (muscle cell) membrane? chemical (ligand)-gated mechanical-gated voltage-gated photoreceptors chemical (ligand)-gated
Receptors for acetylcholine are located in the motor end plate of the muscle cell. True False True
What is the major role of acetylcholine esterase? To cause the release of acetylcholine from the motor neuron. To fill the vesicles located in the motor neuron with acetylcholine. To break down acetylcholine in the synaptic cleft. To break down acetylcholine in the synaptic cleft.
Created by: Tpatti24
 

 



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