Answer:
Activation of the sympathetic branch of the autonomic nervous system results in Fight or flight response
Explanation:
The sympathetic nervous system originates in the spinal cord and its main function is to activate the physiological changes that occur during the fight-or-flight response. This component of the autonomic nervous system utilizes and activates the release of norepinephrine in the reaction. Sympathetic nervous system stimulation causes vasoconstriction of most blood vessels, including many of those in the skin, the digestive tract, and the kidneys. This occurs as a result of activation of alpha-1 adrenergic receptors by norepinephrine released by post-ganglionic sympathetic neurons.
The sympathetic nervous system activates what is often termed the fight or flight response. In response to this stimulus, postganglionic neurons principally release noradrenaline (norepinephrine). Prolonged activation can elicit the release of adrenaline from the adrenal medulla.
So in response to a stressor, the sympathetic nervous system orchestrates the fight-or-flight response. It increases muscle blood flow and tension, accelerates heart rate and respiration, and increases perspiration (sweating) and arterial blood pressure, widen bronchial passages, decrease motility of the large intestine, constrict blood vessels, increase peristalsis in the esophagus, cause pupillary dilation, piloerection (goose bumps) and raise blood pressure.
Answer:
Identical shape and structure.
Explanation:
Those organisms that reproduce sexually have high variations and differences between the parent and its offspring. They are not identical to each other because the offspring gains half characteristics from male parent and half from the female parent making it different from its parent. Identical feature is present in the organisms that reproduce through asexually means from only one parent so the identical shape and structure is not the cost of sexual reproduction.
<span>The cells with the small size have the surface area and volume that are proportional to each other such that this aids with the efficiency of the cell's absorption of nutrients and defecation process of the wastes. Hence, the small dimensions of cells is more efficient than the large ones.</span>
Answer:
Formed elements of the blood are too large to fit through the filtration slits of the filtration membrane. ... Nephron tubules cannot reabsorb large proteins and cells that enter the filtrate.
Answer:
Test Crosses. A test cross is utilized to decide the genotype of a person with a attribute.
Explanation:
Brainliest?