Answer:
His hypothalamus is not able to produce any GnRH.
Explanation:
Gonadotrophin-releasing hormone(GnRH) is a hypothalamis hormone which when released by the hypothalamus is released into small blood vessels and transported to the pituitary gland. Here, it stimulates the production of two more hormones; follicle stimulating hormone and luteinising hormone. These hormones act on the testes to trigger and maintain reproductive functions. Follicle stimulating hormone and luteinising hormone are important in controlling the production of sperm in men as well as the production of testosterone.
When these hormones fail to be released, there is an absence of viable sperm cells that can fertilize an egg to make a baby in the semen. Semen could be produced however, it will consist majorly of prostatic fluid and fluid from other accessory organs such as the bulbourethral gland.
A lack of production of GnRH which occurs in childhood or adolescence prevents the boy child from attaining puberty. However, when this defect occurs in a grown man, it could be due to a number of reasons such as trauma.
Answer: C. fight-or-flight
Explanation:
The fight or flight response is a physiological reaction that occurs due to response one perceives due to harmful event, threat to survival and attack. During the fight or flight reaction the hormones like cortisol and adrenaline are released by the brain. This is responsible for increasing the heart rate, dilation of the pupil, excessive sweating, slowing the digestion process, shunting the blood flow towards the muscle groups and this also involves the change in the autonomic nervous functions that causes a increase in energy and strength.
According to the description above Jade is suffering from fight or flight response due to the threat of rattlesnake.
<span>Most of the South American carriages are concentrated in rivers; ports with indigenous tribal areas and connect in groups of small cities. Thus the main and oldest roads of these regions were built, which go from that point to the other concentrated between rivers and plateaus by means of connections and other alternate routes.</span>
Answer: During sexual activity
Explanation: The two divisions of the autonomic nervous system are the sympathetic division and the parasympathetic division. The sympathetic nervous system prepares the body for the “fight or flight” response during any potential danger while the parasympathetic nervous system inhibits the body from overworking and restores the body to a calm and composed state. The sympathetic and parasympathetic divisions cooperate with each other during sexual activity when male sexual response reflects a dynamic balance between exciting and inhibiting forces of the autonomic nervous system within the penis and throughout the Central nervous systems while the sympathetic component tends to inhibit erections, whereas the parasympathetic system is one of several excitatory pathways.
