A well-used method to determine if a tarantula (a spider) is a male or female is to look at the skin that the tarantula sheds. If the molt (shed skin) show evidence of small organs that are used to store sperm, one can determine that the specimen is a female. This particular organ is an example of
a spermatheca

In general, are there any major differences that you can see? explain

What is a dendrite and what does it do?

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).