BIOL 121 Lecture Notes - Lecture 14: Skeletal Muscle, Signal Transduction, Cardiac Muscle
Document Summary
Can slightly contract, moderately contract, etc, spectrum/anything in between to control these muscles/glands. Can have some of these under conscious control. Sympathetic- fight or flight prepares for a situation that is frightening (to control) Parasympathetic- coordinating system for body at rest; specifically after a meal. Contract as hard as you can (all or none) Both have to do in part with signal transduction mechanisms. With receptors and how they are going to work. Figure 6. 1: basic structure (somatic motor neuron) Chemical messengers (neurotransmitters travel between cells info into the cell body. Projections off a cell body; many per cell. Axons-carry info away from cell body long part where action potential travels down. *there are typically multiple dendrites to a single axon, but. Axon is going to split into alon terminal this happens at an effector which is a muscle or there are quite a few exceptions gland. Can also be major branching earlier on in the form of a collateral.
