Norepinephrine and epinephrine are secreted into the
bloodstream when sympathetic stimulation is provided to the Adrenal Medulla. The
sympathetic nervous system (SNS) originates in the spinal cord and it’s
responsible for the activation of physiological changes that occur during the fight-or-flight
response.
Answer:
Mitocondria is responsible for the reactions in cellular respiration.
Explanation:
Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients. Mitochondria are also responsible for generating clusters of iron and sulfur, which are important cofactors of many enzymes.
Answer:
D. steroid
Explanation:
Intracellular receptors are a type of receptors located inside the cell, specifically in the cytoplasm or nucleus. When intracellular receptors are activated by ligands called SIGNALLING MOLECULES, they change shape and regulate genetic expression in the nucleus i.e. they induce turning on and off in a gene.
However, signalling molecules that activate intracellular receptors are usually hydrophobic hormones because they need to easily diffuse through the cell membrane and bind to the receptors located internally. Example of these hydrophobic signal molecules are STEROIDS.
All the fossils have a small layer of glaciation between them. The glaciation is also a glacier. Underneath all of the fossils is volcanic ash. The volcanic ash was from a long time ago and it was compounded together and formed together. Fossil A, B, and C are all different types of fossils, yet they are still dead creatures that went through the same stages. They died, rotted, and then sunk into the ground and eroded into the rock to form a fossil.
The gas that the planet produces
