Which of the following terms are NOT used interchangeably? Which of the following terms are NOT used interchangeably? in vivo - in the body/ the living muscle cell - muscle fiber motor unit - motor neuron muscle tension - muscle force

The term that can't be used interchangeably are MOTOR UNIT - MOTOR NEURON.

Explanation:

The terms listed in the options above can be used interchangeably because there is similarity that exists between them except Moto unit and Moto neuron.

- invivo : thus equally means in the body.

- muscle fibres: This means the living muscle cell.

- muscle tension: this can be used to replace the word muscle force.

Moto unit can't be used to replace the word Moto neuron because they have different meanings. Moto unit consists of skeletal muscle fibres and neurones which works together to coordinate muscle contraction while Moto neuron is a nerve cell located at the central nervous system that directly or indirectly controls the effector organs. I hope this helps, thanks!

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c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.