The respiratory center rhythmically sends neural output to the diaphragm and muscles to regulate quiet breathing. The respiratory center is stimulated to alter breathing rate and depth by input from in the brain. Additional input comes from peripheral receptors, including within the carotid and aortic bodies, of the mucosal lining of the respiratory tract, of the lungs and visceral pleura, and of the joints. Breathing can be consciously controlled by the , which bypasses the respiratory center to directly stimulate lower motor neurons.

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time. c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

Which heredity condition causes a buildup of mucus in lungs and pancreas? a. cystic fibrosis b. heart disease c. huntington's disease d. sickle cell anemia