Investigators discover a body of a hiker in a dense forest. Analysis shows considerable insect activity on and around the body and apparent changes to the victim’s abdomen. Which of the following details can you surmise? The victim died at least two hours ago. The victim died at least 12 hours ago. The victim has been dead for over a day. The victim has been dead for at least four days.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

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).

When are the centromeres broken in meiosis?