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Dahasolnce [82]
3 years ago
13

Using your answer to F and what you have learned about the polar nature of the water molecule, explain what causes magnesium chl

oride to dissolve in seawater
Biology
1 answer:
Talja [164]3 years ago
6 0
MgCl2 dissolves in water because the individual ions in the solid (Mg2+ and Cl-) coordinate with the partial charges in the water molecules. The magnesium cations coordinate with the partially negatively charged oxygen atoms and the chlorine anions coordinate with the partially positively charged hydrogen atoms.
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Which of the following statements best describes the role of hormones in the body? Hormones send chemical signals throughout the
il63 [147K]

Answer:

Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus elicits the release of a substance; once the substance reaches a certain level, it sends a signal that stops further release of the substance. In this way, the concentration of hormones in blood is maintained within a narrow range. For example, the anterior pituitary signals the thyroid to release thyroid hormones. Increasing levels of these hormones in the blood then give feedback to the hypothalamus and anterior pituitary to inhibit further signaling to the thyroid gland, as illustrated in Figure 18.14. There are three mechanisms by which endocrine glands are stimulated to synthesize and release hormones: humoral stimuli, hormonal stimuli, and neural stimuli.

Explanation:

Hyperthyroidism is a condition in which the thyroid gland is overactive. Hypothyroidism is a condition in which the thyroid gland is underactive. Which of the conditions are the following two patients most likely to have?

Patient A has symptoms including weight gain, cold sensitivity, low heart rate and fatigue.

Patient B has symptoms including weight loss, profuse sweating, increased heart rate and difficulty sleeping.Humoral Stimuli

The term “humoral” is derived from the term “humor,” which refers to bodily fluids such as blood. A humoral stimulus refers to the control of hormone release in response to changes in extracellular fluids such as blood or the ion concentration in the blood. For example, a rise in blood glucose levels triggers the pancreatic release of insulin. Insulin causes blood glucose levels to drop, which signals the pancreas to stop producing insulin in a negative feedback loop.

Hormonal stimuli refers to the release of a hormone in response to another hormone. A number of endocrine glands release hormones when stimulated by hormones released by other endocrine glands. For example, the hypothalamus produces hormones that stimulate the anterior portion of the pituitary gland. The anterior pituitary in turn releases hormones that regulate hormone production by other endocrine glands. The anterior pituitary releases the thyroid-stimulating hormone, which then stimulates the thyroid gland to produce the hormones T3 and T4. As blood concentrations of T3 and T4 rise, they inhibit both the pituitary and the hypothalamus in a negative feedback loop.

3 0
3 years ago
Match the columns:
Galina-37 [17]

Answer:

I have matched them below

Explanation:

each of the columns have been properly matched below:

1. attaches bones to bones and muscles to bones = d. dense regular connective tissue

2. insulates against heat loss = a. adipose connective tissue

3. forms the fibrous joint capsule =

c. dense irregular connective tissue

4. makes up the intervertebral discs = g. fibrocartilage

5. composes basement membranes; a soft packaging tissue with a jellylike matrix = b. areolar connective tissue

6. forms the larynx, the costal cartilages of the ribs, and the embryonic skeleton = h. hyaline cartilage

7. provides a flexible framework for the external ear = e. elastic cartilage

8. provides levers for muscles to act on = i. osseous tissue

9. forms the walls of large arteries = elastic connective tissue

6 0
3 years ago
The effect of pon the rate of photosynthesis?
snow_lady [41]

Answer:

sun gives plant energy which gives animal and humans food

Explanation:

5 0
3 years ago
Read 2 more answers
What best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions
Slav-nsk [51]
I suppose it is the density, having more pockets of air in between the granules of sawdust. Air has oxygen. What does a fire need to strive? Oxygen.
8 0
3 years ago
The primary reason that a herpes simplex virus (hsv) infection is a serious concern to a client with human immunodeficiency viru
Tpy6a [65]
It makes a person with HIV more able to pass it along. HSV could act as a co-factor to HIV which makes it easier  It increases the viral load of HIV and also, HIV would be present in herpes blisters. Genital shedding seen on HIV patients may be increased if they also have herpes. 
4 0
3 years ago
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