Answer:the ability of rock or soil to allow water to flow through it. ... Fresh water is also found in rivers, lakes, and earths surface in aquifers. explain why fresh water is considered a limited resource. Fresh water is such a limited resource because there is such a little amount of fresh water found on Earth.
Explanation:
<h2>Option(A) is Right Answer</h2>
Explanation:
(a) lobules is right answer
- <em>The spermatozoa from the rete testis, </em>at that point meet to form the <em>ductus epididymis, a tangled pipe</em>
- The ductus epididymis fixes and turns into the <em>ductus deferens</em>. In domestic mammals <em>blooded mammals, testicles</em> are not in a significant body cavity, yet are encased in the <em>scrotum </em>
- The glandular structure of the testis comprises of various lobules. Every tubule is contained in one of the interims between the <em>stringy septa which reach out between the mediastinum testis and the tunica albuginea</em>, and comprises of from one to, at least three, minute tangled <em>cylinders, the tubuli seminiferi</em>
Answer:
The correct answer is "There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include: multiple receptors for the same hormone, a single receptor coupled to different pathways and hormones interacting with receptors for other molecules".
Explanation:
Hormones are among the most versatile molecules of the body, responsible for different biological processes such as human growth, sex development and metabolisms. Hormones are responsible of these complex biological processes because they have drastically different effects in different cells. There are several mechanisms that explain why a hormone have different effects in different cells. These mechanisms include:
- Multiple receptors for the same hormone. For instance, there are multiple receptor for dopamine, a hormone and neurotransmitter responsible for different functions such as movement, memory, sleep and motivation.
- A single receptor coupled to different pathways. Most hormone receptors act with a cascade of signaling. This in consequence results in a single receptor interacting with different molecules having multiple effects.
- Hormones interacting with receptors for other molecules. One example is the action of one metabolite of progesterone named allopregnanolone. This metabolite interacts with GABA-A receptor, which gives it anxiolitic properties.
