The yolk is the portion of an egg that is produced by the ovary and carries the 1.
ovum.
2. Between the inner and outer shell membranes there is a called the air cell
3. The air cell is usually found at the
end of the egg
4. The pores in the shell allow to pass into the egg and carbon dioxide to leave.
5. If the shell were not gas-, then the embryo would die.
6. The germinal disc (or blastoderm) is the portion of the egg that will form the
The chalaza/chalazae (plural) are a pair of thick spiral bands of _that attach to
opposite ends of the membrane lining the shell.
8. The yolk is ___ in the center of the egg to prevent it from touching the shell.
7.
9. Another name for albumen is and there is thick and thin albumen.
and contains a large amount of
needed by the
10 The albumen serves as a
developing embryo.

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).