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jolli1 [7]
3 years ago
7

One major problem with the human-induced stress on ecosystems is that: newly introduced species almost never thrive in unfamilia

r ecosystems ecosystems are too biodiverse to respond to human-caused threats ecosystems and humans cannot coexist natural selection cannot keep up with the constant human-caused threats evolution tends to occur more rapidly while under stress
Biology
1 answer:
nika2105 [10]3 years ago
8 0
Answer is<span>: cannot keep up with the constant human-caused threats</span>
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Throughout history which of these is an ecological impact associated with agriculture
Scilla [17]
Which of what? could you be more clear?
3 0
3 years ago
Turgor pressure is the pressure exerted on a plant cell wall by water. When wilted plants are placed in water, they demonstrate
Rus_ich [418]

Answer: When wilted plants are given water, it enters the cell generating turgor and giving a firmer appearance, and this water is stored in the vacuoles.

Explanation:

Turgor is a phenomenon in plant cells in which the cell expands due to the pressure exerted by the fluids and also by the cell content on the walls. It is related to osmosis, since the external pressure is usually very high and this internal pressure dilates the cell as much as the elasticity of the membranes allows. <u>Then, the cells swell by absorbing water, tensing the membranes because of the pressure against them.</u> When the fluid exerts outward pressure on the cell wall it is called turgor pressure.  Whereas, the inward pressure exerted on the cell contents by the stretched cell wall is called wall pressure. Generally, both pressures, turgor pressure and wall pressure, are counterbalanced and balanced.

So, this pressure of turgor facilitates the elongation of the cells in the plant, and also, the cells use this phenomenon to regulate the transpiration through the opening and closing of the stomach.

Thereby, the turgor of a living cell is influenced by three primary factors:

  • An adequate supply of water.
  • The formation of osmotically substances.
  • A semi-permeable membrane.

Vacuoles are organelles bounded by a single membrane and present in plant and fungal cells, and where water is stored. Plant cells control their turgor pressure through the movement of water into or out of vacuoles. When wilted plants are given water, it enters the cell generating turgor and giving a firmer appearance, and this water is stored in the vacuoles.

3 0
3 years ago
Why do you feel hot and cold at the same time when you're sick?
Evgen [1.6K]
Because your body is fighting the sickness and the bacteria.
6 0
3 years ago
Portal blood vessels connect two capillary beds found in the ________. A. hypothalamus and thalamus B. anterior pituitary and po
sdas [7]

Portal blood vessels connect two capillary beds found in the hypothalamus and anterior pituitary.

So, the correct option is C.

<h3>Hypothalamus-Pituitary Complex:</h3>
  • The "command center" of the endocrine system is assumed to be the hypothalamus-pituitary complex.
  • In addition to hormones that directly affect target tissues, this complex also secretes hormones that control the production and release of hormones from other glands.
  • Furthermore, the hypothalamus-pituitary complex controls the communications between the nervous and endocrine systems.
  • The hypothalamus-pituitary complex is frequently necessary for the translation of a stimulus into hormones that can start a reaction after it is received by the neurological system.
  • Additionally, the pituitary gland (also known as the hypophysis), a bean-shaped organ hung from the hypothalamus by a stem called the infundibulum (or pituitary stalk), is physically and functionally connected to the hypothalamus.
  • The sella turcica of the sphenoid bone of the skull serves as a cradle for the pituitary gland.
  • It has two lobes, the posterior pituitary (also known as the neurohypophysis), which is made of neural tissue, and the anterior pituitary (also known as the adenohypophysis), which is made of glandular tissue.

<h3>Anterior Pituitary:</h3>
  • The embryonic anterior pituitary develops from the gastrointestinal tract and moves toward the brain as the fetus grows.
  • The pars tuberalis is a thin "tube" that wraps around the infundibulum, the pars distalis is the most anterior, and the pars intermedia is next to the posterior pituitary.
  • Neurons secrete hormones from the hypothalamus, but blood arteries transport them to the anterior pituitary.
  • There is a capillary bridge that links the anterior pituitary and hypothalamus inside the infundibulum.
  • The hypophyseal portal system is the network that enables the delivery of hypothalamic hormones directly to the anterior pituitary without first passing via the systemic circulation.
  • The superior hypophyseal artery, a branch of the carotid arteries that carries blood to the hypothalamus, serves as the system's initial point.
  • The hypophyseal portal system is made up of the superior hypophyseal artery's branches.
  • The portal veins deliver hypothalamic releasing and inhibitory hormones into the anterior pituitary via a main capillary plexus.
  • Anterior pituitary hormones enter a secondary capillary plexus in reaction to hormones being released, and from there, drain into the blood circulation.
  • In the anterior pituitary, seven hormones are produced.
  • Separate hormones produced by the hypothalamus either promote or suppress the anterior pituitary's capacity to produce hormones.
  • The hypophyseal portal system is the route by which hormones from the hypothalamus get to the anterior pituitary.
  • Seven hormones are produced by the anterior pituitary.
  1. Beta endorphin,
  2. prolactin,
  3. thyroid-stimulating hormone (TSH),
  4. adrenocorticotropic hormone (ACTH),
  5. growth hormone (GH),
  6. follicle-stimulating hormone (FSH), and
  7. luteinizing hormone (LH).
  • Because they regulate the activity of other endocrine glands, the anterior pituitary hormones TSH, ACTH, FSH, and LH are together known as tropic hormones.

Learn more about " Anterior Pituitary ":

brainly.com/question/14704975

#SPJ4

6 0
1 year ago
Unlike endocrine glands, exocrine glands
valentina_108 [34]
The answer is A. utilize ducts to release their secretions.
Exocrine glands are glands that secrete their products into ducts, they are the counterpart of endocrine glands which release their products into the bloodstream. Typical exocrine glands include: mammary glands, sweat glands, salivary glands, and many glands of the digestive system.
5 0
3 years ago
Read 2 more answers
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