The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
Answer:
IN a synapse, neurotransmitter chemicals are received by the POST-SYNAPTIC MEMBRANE CELL BODIES.
Explanation:
Synapse is a biological region through which chemicals can be sent to each other such as those in glands and muscles. In a synapse, chemicals released from the pre-synaptic membrane are received by the synaptic cleft adjacent to another neuron. The chemicals then bind to the neurotransmitter receptors on the post-synaptic cell. These are then released into the post-synaptic cell bodies to stop the action of the neurotransmitter receptors in order for the chemicals to perform the function of excitation or inhibition depending on the stimulus.
Answer:
Dense hair and thick skin.
Thin skin and Nocturnal behavior.
Explanation:
Dense hair and thick skin are the adaptation that is beneficial to organisms that is present in the environmental condition of Mountain Rock because on Mountain Rock, the temperature is very low so organisms needs something which make them warm, while on the other hand, thin skin and Nocturnal behavior are the adaptations that is beneficial to organisms in the Desert Sand environment because temperature is very hot.