Because radiation goes a long way. Radiation itself isn't visable but if it's from a nearby star you'll be able to see the star. Radiation keeps moving outwards forever. Things that can sense radiation that you can't see will help you have an idea how far away the source of that radiation is from
Answer:
1. Nerve impulse
2. Neurons
Explanation:
Neurotransmitters are compounds with low molecular weight. They are secreted by axon terminals of the neurons. The released neurotransmitters then bind to the receptors located on next neuron or on the surface of muscle cell.
The function of neurotransmitters is to carry the nerve impulse from presynaptic neuron to the postsynaptic neuron or from neurons to the effector organs such as muscles and glands.
For example, neurotransmitters are released into the synaptic cleft to transmit the nerve impulse between neurons.
The correct answer is The cell is prokaryotic because it does not have any membrane-bound organelles.
Explanation:
Prokaryotic cells are different from eukaryotic cells because prokaryotic cells do not have organelles surrounded by a membrane, while eukaryotic cells do. These organelles include a nucleus, ribosome, among others. On the opposite, the DNA material is located inside the cell forming an undefined structure and the cell is protected by the cell wall and the cell membrane. In this context, the cell of the image is prokaryotic because there are no defined organelles inside it.
Answer: Insulin is a hormone, which is secreted by the pancreas to regulate the sugar levels in the bloodstream.
Explanation:
Insulin is a protein hormone if take orally, will get digested in the digestive tract, it will not be able to affect the target site of action.
Insulin gets denatured in the digestive tract. Thus it will not be able to control the blood sugar levels.
Nancy has taken the insulin dose orally, the insulin will get denatured in the digestive system, it will not function and Nancy will remain hyperglycemic after the consumption.
Answer:
c. The size of the cell increases during the G2
Explanation:
Interphase of cell cycle includes G1, S and G2 phases. The G2 phase is the second interval or gap that comes after DNA replication in the S phase. During the G2 phase, the cell prepares for division. The cells in the G2 phase exhibit an increased rate of protein synthesis to finally prepare them for cell division. However, there is no increase in cell size during this phase. G1 phase is the first interval of cell growth and activity before the start of DNA replication in the S phase. During the G1 phase, cells experience growth and normal metabolism.
