Mee! the following table describes five molecules that belong to the same class. molecule function hemoglobin transports oxygen in the blood amylase an enzyme that breaks down starch immunoglobulin an antibody produced in response to an invading particle collagen the main structural component of connective tissues aquaporin transports water in and out of the cell which class of biomolecule do the molecules in the table belong to? a. carbohydrates b. lipids c. proteins d. nucleic acids

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).