explain how the nervous system increases heart rate
Coordination via medulla / cardiac centre in the brainIncreased impulses along sympatheticnerve to the Sino atrial node, otherwise known as pacemakerrelease of noradrenalineincrease in impulses from Sino atrial nodeincrease in heart rare
EM
Related Biology A Level answers
All answers ▸Contrast facilitated diffusion and active transport
When a new antigen is presented to the immune system, an immune response leads to antibodies are released. The second time this happens it is much faster - explain why
For a dihybrid cross, how do you find out what proportion of offspring are expected to have a certain genotype?
If DNA inside a cell is damaged, a protein called p53 halts the cell cycle. With this in mind, explain how a p53 gene mutation could cause cancer to develop.