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julia-pushkina [17]
3 years ago
8

During exercise, sympathetic input to the heart is increased. Stroke volume is often maintained, or even increased, even though

heart rate is also increasing. How is this possible
Biology
1 answer:
pantera1 [17]3 years ago
4 0

Answer:

1. Sympathetic input increases ventricular contractility, thereby increasing stroke volume.

2. Sympathetic input decreases conduction time within the heart, decreasing the delay between atrial and ventricular contractions.

3. Sympathetic input increases the speed of ventricular contraction.

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Phytoplankton are so tiny you need a microscope to see them. How do they affect the global carbon cycle?
Ksju [112]

Answer:

Phytoplanktons are microscopic creatures that are primary producers of oceans. Phytoplanktons take carbon dioxide from atmosphere to make their food and then they are eaten by some other animals of oceans.

Phytoplanktons are present in huge numbers in oceans and have a great contribution to the carbon cycle because it is responsible for the transfer of carbon dioxide from the atmosphere to the oceans.  

Most of the carbon is released through combustion by animals that eat phytoplanktons but some accumulate in the ocean floor because some dead phytoplanktons settles down in the ocean.

6 0
3 years ago
If two trucks have the same mass, but truck A is traveling 15 km/h, and truck B is traveling 30 km/h, what statement is true? Qu
Montano1993 [528]

Given that the two trucks have the same mass but different velocities, that is truck A is traveling 15 km/h and truck B is traveling 30 km/h,  hence  Truck B will have a greater stopping distance.

The reason why Truck B will have a greater stopping distance is because it speed is greater hence more distance to cover.

From the following expression

Speed = Distance/Time

Distance = Speed*Time

More on the kinetic Energy

Following from the given problem truck B will also have more kinetic energy because it velocity is more

Formula

KE= 1/2mv^2

Hence the more the velocity for a constant mass the greater the Kinetic energy

Learn more:

brainly.com/question/20658056

 

6 0
2 years ago
Being an athlete, adequate fluid intake is very important. Explain why dehydration is a concern.
NikAS [45]

Answer:

Dehydration is a concern since dehydration can lead to severe complications, such as seizures, swelling of the brain, kidney failure, shock, coma and even death. Signs and symptoms of dehydration include: Headache. Dizziness or lightheadedness.

Explanation:

5 0
2 years ago
Use the drop-down menus to complete each sentence.
suter [353]

Answer:

The correct answer would be - 1. group 2.period 3. less 4. more

Explanation:

elements that have a place with same group contains same number of valence electrons. Thus, they will in general show comparable chemiccal properties.  

At the point when we move over a period at that point number of electrons get added to a similar shell. Therefore, there will be no expansion in size of elements.  

Additionally, metals are the elements that have a place with group 1, 2 and d-block group are otherwise called metals. Metallic character of elements diminishes when we move left to directly in a periodic table.  

As most responsive metals are put on the left half of occasional table.  

Since, size of elements increases on descending the groups. Along these lines, a elements can lose its valence electrons due to the less forrce of ttaraction between valence electrons and its neucleus.

7 0
3 years ago
What do you think the difference between a community and a population
Aliun [14]

Answer:

Explanation:Community includes many types of population, but population it is a group of 1 type of animal

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