No. animal cells are not as mobile as bacteria, which means they don’t need a flagellum. Animal cells do not need a cell wall- as the cell wall is primarily used to maintain structure, which is needed in photosynthetic plants. please give this brainliest!
Answer:
Multicellular organisms can be described as an organism which is made up of multiple cells. A unicellular organism is made up of only a single cell. Multicellular organisms are complex organisms as they are made up of more than one cell. Unicellular organisms are simple organisms as they constitute of only a single cell.
Examples of a multicellular organism include humans, elephants, bats, rats, cats etc.
Example of a unicellular organism is bacteria.
It was used till the 1960s. Hope i helped.
The geologic cross section will always be younger than the rocks it goes through. Please rate brainliest if this helps!
Answer:
The correct answer is: β1 adrenergic receptor activation. Increased in cAMP lead to increased amounts of Na influx (though if channels) and calcium influx of pacemaker cells. This increases the frequency of APs of the pacemaker and increases the rate of contraction.
Explanation:
cAMP generated in response to β1 adrenergic receptors,results in excitation contraction coupling by initiating PKA and causing phosphorylation of L type Ca2+ channels and ryanodine receptors. This increases the concentration of intracellular Ca2+ ions in atrial cells, ventricular cells and AV pacemaker cells. This increase in firing rate. As a result rate of contraction increases.
