The answer is an abdominal cavity.
The abdominal cavity refers to a space that comprises various essential organs including the stomach, the lower part of the esophagus, colon, small intestine, gallbladder, liver, rectum, bladder, spleen, and kidneys.
The abdominal cavity is a big cavity found in humans and various other animals. It is a component of abdominopelvic cavity. It is situated above the pelvic cavity and below the thoracic cavity. Its dome-shaped roof is the thoracic diaphragm, a thin sheet of muscles beneath the lungs, and its floor is the pelvic inlet, opening into the pelvis.
Arrange the events of synaptic transmission in correct sequence
(1) sodium ions diffuse into the cell and cause a local potential
(2) neurotransmitter binds with receptor on postsynaptic cell
(3) neurotransmitter diffuses across the synaptic cleft
(4) membrane permeability to sodium ions on postsynaptic cell increases
(5) action potential causes release of neurotransmitter
Answer:
5,3,2,4,1
Explanation:
The firing of an action potential at pre-synaptic neuron makes its axon terminal to release the neurotransmitters in the synaptic cleft. The released neurotransmitter molecules then bind to their receptors present at the surface of the dendrites of the postsynaptic neuron. This binding opens ion channels and allows the specific ions to enter into the postsynaptic neuron. The opening of Na+ channels allows these ions to enter into the neuron and changes the membrane potential. This changed membrane potential is called local potential and is a depolarizing graded potential.
Answer:
polarized cells
Explanation:
The intestinal epithelium is lined with a single layer of polarized cells,
Carbohydrates they are all sugars or macromolecules
Answer:
Plants must have evolved in a manner where they require less water and nutrients as these two were the only limiting factor and carbon dioxide was in abundance
Explanation:
Some 400,000 years ago, the concentration of CO2 was very high and was near to 1000 ppm. At this high concentration of CO2 the photosynthetic activity of plants becomes very high and thus since 400,000 years ago plants could have evolved in an uncontrolled manner but this does not happened. So the reason behind this is limitation in terms of soil and its constituent’s nutrients availability and also limited supply of water.
Therefore, if plants would have evolved themselves in a manner where they require less water and nutrients then they would have grown limitless.