What do synaptic vesicles of a neuromuscular junction contain?   a serotonin   b sodium   c acetylcholine   d calcium

Question 3 What must occur for a neuron to be polarized to resting membrane potential? O Na+/K+ pump moving 3 K+ outside cell and 2 Na+ inside cell; both ligand gated channels closed O Na+/K+ pump moving 2 K+ outside cell and 3 Na+ inside cell; both mechanically gated channels closed O Na+/K+ pump moving 3 Na+ outside cell and 2 K+ inside cell; both voltage gated channels closed O Na+/K+ pump moving 2 Na+ outside cell and 2 K+ inside cell; both chemically gated channels closed < Previous

Question 5 Which gets weaker over time? O' both action and graded potential graded potential O action potential

Question 4 As a result of aging: O Striations increase O Muscle strength increases O Fat replaces muscle Muscles hypertrophy Reflexes increase

QUESTION 10 Which of the following is NOT true of intermediate filaments?   A They provide mechanical strength to cells.   B They are composed of 8 oppositely oriented tetramers that are assembled into a rope-like filament.   C They have a non-polar orientation.   D They are rigid and do not deform before breaking   E Keratins, neurofilaments, vimentin, and desmin are examples of intermediate filaments.

Question 3 Dimen Drag to sort the components of a neuron in the order through which electrical signals travel, axon dendrite soma

QUESTION 9 How is smooth muscle contraction regulated differently from striated skeletal muscle contraction?   A. Smooth muscle has organized parallel arrays of myofilaments.   B. Smooth muscle cells contract only through voluntary control.   C. Smooth muscle does not have myosin filaments.   D. Smooth muscle does not respond to elevations in intracellular Ca2+ levels.   E. Smooth muscle does not have troponin.

QUESTION 16 What type of cells are shown in this figure? Membrane D Compartment A Compartment B Compartment C Membrane E Transporting Epithelia Exchange Epithelia Protective Epithelia Secretory Epithelia