Final answer:
Smartphones do contain components such as haptic motors and speakers that can be considered actuators but are limited in function compared to industrial actuators. For the chapter review, it is false that each motor neuron controls one muscle fiber, and true that peristalsis involves contractions in smooth muscle tissue. Muscle atrophy results in reduced size and strength.The correct option is 2.
Step-by-step explanation:
Regarding the question, "Do phones act as actuators too?" the statement can be considered both true and false depending on the context. An actuator is a device that converts energy (often electrical energy) into motion. In that sense, smartphones contain components like haptic feedback motors (vibration) and speakers which can be considered as actuators since they convert electrical signals into vibration and sound, respectively. However, when we typically refer to actuators, we're talking about devices that induce physical movement, like how a robotic arm moves. Phones primarily serve as communication devices and their actuator-like functions are relatively limited compared to specialized actuators in industrial machinery.
Regarding the CHAPTER SUMMARY REVIEW:
- True or False. Each motor neuron controls one muscle fiber. False. A single motor neuron typically innervates multiple muscle fibers in a process called motor unit recruitment.
- True or False. Peristalsis is a pattern of muscle contraction in smooth muscle tissue. True. Peristalsis is indeed a coordinated, rhythmic series of muscle contractions which propels food through the digestive tract.
- When muscles atrophy: they decrease in size and strength, usually due to disuse or disease.