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liberstina [14]
2 years ago
9

As your muscles contract during activity, more blood is returned to the heart. which variable would be affected and what would b

e the outcome of this action?
Biology
1 answer:
timama [110]2 years ago
6 0
Heart rate. <span>From this site, the two channels of the autonomic nervous system originate the sympathetic and parasympathetic components. The sympathetic components increase heart rate by releasing the neural hormone catecholamines - epinephrine and norepinephrine. These hormones are cardio accelerators. Acceleration of the heart rate is called tachycardia.</span>
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Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes woul
slega [8]

Answer:

Option D, only II, III, and IV

Explanation:

Complete Question

Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?

I) Keystone predators have a marked effect on species diversity.

II) Green plants produce the oxygen we breathe.

III) The presence of land plants builds soil.

IV) The presence of diverse wetlands helps in flood control.

A) only II and IV

B) only I and III

C) only I, II, and IV

D) only II, III, and IV

Solution -

The services of ecosystem has been classified into four groups  

a)  Provisioning – Where essential abiotic and biotic substance are produces such as production of food and water, reproducing offspring etc.  

b) Regulating – the ecosystems is controlled through environmental factors such as control of climate and disease

c) Supporting – Ecosystem support the activities that are essential for survival. Primarily includes all nutrient cycles, oxygen generation etc.  

d) Cultural – Provide aesthetic view and  recreational benefits

Option II co mes under supporting service of ecosystem

Option III co mes under Provisioning service of ecosystem

Option IV co mes under Regulating service of ecosystem

Hence, option D is correct

5 0
3 years ago
Most water-soluble hormones exert their effects through the second messenger cyclic AMP (cAMP). This activity will test your und
Viktor [21]

Answer:

cAMP dependent pathway is important for processing of life.

Explanation:

cAMP pathway is also called as adenynyl cyclase pathway.

This mechanism requires different steps like-

  1. G protein coupled receptor is a integral protein that is activated by different external stimuli which binds with the specific ligand.
  2. Extracellular ligand causes activation of GPCR which in turn is responsible for conformational change  in the receptor and allows it to bind with the intracellular heterotrimeric G protein complex.
  3. The Gα  stimulate G protein complex to exchange GDP for GTP and then the complex is released.
  4. Activated Gα binds with adenylate cyclase and catalyzes ATP to form cyclic AMP.
  5. Activation of cAMP leads to the activation of nucleotide gated ion channel, and PKa(Protein kinase A) which is also called as cAMP dependent enzyme.
  6. Once, PKA is activated,it causes phospholylation of other proteins like AMPA receptor,transcription factors which regulate gene expression, and convert glycogen into glucose.
8 0
3 years ago
How does DNA replication take place ?
attashe74 [19]

The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.


So yeah xD


~ Hope this helps! -by Kana ^^

4 0
3 years ago
What is the effect of defective or missing N-acetylglucosamine phosphotransferase on lysosomal protein sorting?
LiRa [457]

Answer:

The deficiency in this enzyme causes that it begins erroneously label other enzymes. Because the activating proteins are not properly labeled, they escape into spaces outside the cell and do not disintegrate substances inside the cells, that is, lysosomes cannot perform their function correctly. This causes waste products, which must include carbohydrates, lipids and proteins, accumulate in specific masses as inclusion bodies.

8 0
3 years ago
What causes the differences in average temperature and the changes
zvonat [6]

Answer:

The Earth's axial tilt is what causes the differences in average temperature that are associated with the change in seasons on Earth

Explanation:

pls follow me

6 0
3 years ago
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