1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
madreJ [45]
2 years ago
15

The heart is part of which organ system?

Biology
2 answers:
Jet001 [13]2 years ago
7 0

Answer:

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

Explanation:

Savatey [412]2 years ago
7 0
Cardiovascular. Related to blood and heart and blood vessels.
You might be interested in
"__________" is a homemade alcohol produced during the prohibition.
Illusion [34]

By late 1920s most alcohol was made at home.  Alcohol was made at home is the illegal 'stills' because deaths from purposely poisoning alcohol went up from 98 in 1920 to 760 in 1926.  The homemade alcohol was known as moonshine. 

7 0
3 years ago
How do actin and myosin work together to move a muscle?
Ratling [72]

Answer:

I don't know

Kwoeieu3iejdhd

3 0
2 years ago
An enzyme contains a catalytic histidine residue in its active site that must release an R group proton to solution in order to
hjlf

Options missing:

a) The pH of the environment should be relatively high.

b) The pH of the environment should be relatively low.

c) The pH of the environment would not matter.

d) The environment should be set to the biochemical standard state.

Answer:

a) The pH of the environment should be relatively high.

Explanation:

For optimal function an enzyme needs a certain environment or condition. As temperature increases, the rate of enzyme activity also increases. As temperature increases toward its optimum point of 37 degrees Celsius (98.6 F), hydrogen bonds relax and make it easier for the hydrogen peroxide molecules to bind to the catalase.

The part of the enzyme where this reaction takes place is called the active site. A temperature that is higher or lower than this optimum point changes the shape of the active site and stops the enzyme from working. This process is called denaturation.

Enzyme pH levels also change the shape of the active site and affect the rate of enzyme activity. Each enzyme has its own optimal range of pH in which it works most effectively. In humans, catalase works only between pH 7 and pH 11. If the pH level is lower than 7 or higher than 11, the enzyme becomes denaturated and loses its structure. The liver sustains a neutral pH of about 7, which creates the best environment for catalase and other enzymes.

General acid catalysis would require histidine to be protonated at pH values (pH 8.0) optimal for enzymatic activity which is relatively high.

3 0
3 years ago
A hypothetical bacterium swims among human intestinal contents until it finds a suitable location on the intestinal lining. it a
ivann1987 [24]

The bacterium is not susceptible to the penicillin family of antibiotics. it contains no plasmids and relatively little peptidoglycan. Adherence to the intestinal lining by this bacterium is due to its possession of a capsule.

5 0
3 years ago
Assume that you found an object that looks like a dead twig. You wonder if it might be a stick insect. How could you determine i
nlexa [21]

Answer:

I determine if the object is a living thing by checking to see if it responds to the environment

8 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP WILL GIVE BRAINLIEST TO CORRECT ANSWER
    6·1 answer
  • It has been stated that the rainforests owe their existence at least in part to bats.
    7·1 answer
  • Which of the following is fact based science rather than a part of a personal belief system
    6·2 answers
  • 1. How does inflammation help the immune system to fight<br> pathogens?<br> II
    8·1 answer
  • Which scientist developed a theory that describes how light interacts with gravity?
    6·1 answer
  • When does DNA replication take place
    6·2 answers
  • ASAP WILL GIVE BRAINLIEST
    10·1 answer
  • Help i need this its timed
    11·1 answer
  • If I were to make hot cocoa which consists of chocolate syrup and milk, identify the solution
    13·2 answers
  • When designing your experiment, what would your experimental group and your independent variable be?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!