Answer:
The upper respiratory system includes the nasal cavity (nose), the pharynx and larynx.
Explanation:
Air enters the body through the nose or mouth, this moistens and warms the air that enters since cold dry air will irritate the lungs. The air then travels down the voice box and down the windpipe.
Animals expel energy to keep warm
Animal testing is inhumane and very unnecessary. There are so many different options available, There is no explanation for the poisoning, burning, and killing of about 100 mill animals each year causing them pain & fear. Animals are not little humans, and even tho we share a lot of our genes with other them the way our genes work is different.
Answer:
Recruitment; rate coding.
Explanation:
Muscle is one of the important tissue of the body that helps in the movement of the body. Cardiac muscle, smooth muscle and skeletal muscle are three different types of muscle.
The muscle has the ability to change its contraction force depends upon the two factors. The rate coding adjusts the firing of the neural muscle rate while travelling down to the motor neuron via the central nervous system. The motor unit recruitment is the way bu which the number of different units recruited in a particular task can be altered.
Thus, the correct answer is option (c).
