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Bess [88]
3 years ago
14

What three mechanisms regulate the heart?

Biology
1 answer:
Tamiku [17]3 years ago
7 0
The three mechanisms which regulate the heart are endocrine, cardiovascular and Sinoatrial nodes.
The endocrine system consists of the glands and hormones of the human body. The cardiovascular system is the organ system which is responsible for the circulation of the blood around the body and the oxygenation of the body's tissues. The sinoatrial node (SA node) generates the electrical impulses and is considered the natural pacemaker of the heart.
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_________ is a smooth muscle cell has a central nucleus but lacks striations.
Natalija [7]

Answer:

Linings of hollow organs

Explanation:

Smooth muscle cells are usually found in the lining of hollow organs such as all arteries and veins, wall of stomach, uterus, urinary bladder, digestive system etc. The cells of these linings are spindle shaped and consist of a nucleus at the center which lacks striations.  

They work as a housekeeper and are under involuntary control except the heart. They lack striation because of irregular arraying of actin and myosin filament along the length of the cell.  

4 0
3 years ago
What is attracted to the oxygen atom in a water molecule?
aivan3 [116]

Answer:

a.

Explanation:

The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond.

7 0
3 years ago
Read 2 more answers
An accident resulted in a man’s hand being cut off from his arm. Paramedics arriving first on the scene
podryga [215]
I believe that it is because when you put the hand on ice it causes the hand too cool and prevents/slows the rate at which the nerves get damaged.
8 0
3 years ago
If you are testing traits for Mendelian inheritance, how do you calculate the EXPECTED values?
Georgia [21]

n a cross between two heterozygous individuals, the offspring would be expected to show a 3 : 1 ratio. For example, in Case 1, three-fourths of the individuals would have red (wild-type) eyes, and one-fourth would have sepia eyes.

If there are 44 offspring, how many are expected to have red eyes?

We expect three-fourths to have red eyes.
<span>34</span> of 44 = 33

If there are 44 offspring, how many are expected to have sepia eyes?
<span>14</span> of 44 = 11

Now you are ready to calculate chi-square.

8 0
3 years ago
What interventions could increase monogamy among meadow voles?
bagirrra123 [75]

Upregulation of vasopressin and oxytocin in the spinal cord using microcatheter interventions could increase monogamy among meadow voles. the correct answer is option(e).

In contrast to non-monogamy, monogamy is a type of dyadic interaction in which an individual has only one partner during their lifespan or, alternatively, just one partner at any given moment. The phrase is also used to describe how some animals behave in social situations, specifically the status of having just one mate at any given time.

Inhibitory interneurons may be activated by oxytocin and vasopressin across subcortical and possibly cortical networks, including reward pathways, to moderate their effects. Brain areas that are important for maintaining behavioral and physiological equilibrium are where oxytocin and AVP are largely produced. These two peptides are produced by several cells in distinct areas of the brain, including the supraoptic nucleus (SON) and paraventricular nucleus (PVN) in the hypothalamus.

To know more about monogamy refer to:  brainly.com/question/13161546

#SPJ1

5 0
2 years ago
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