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
Strike441 [17]
1 year ago
12

Question 29 of 30

Biology
1 answer:
lesya692 [45]1 year ago
5 0
A. Primary and secondary consumer
You might be interested in
Select the correct answer.<br> Which of these is a protein?
shusha [124]
Um i don’t see anything
6 0
3 years ago
how does the nervous system help the body maintain homeostasis? if it doesn't function correctly how does it affect the body?
Alchen [17]

Answer:

Homeostasis is maintained at many levels, not just the level of the whole body as it is ... Of course, body temperature doesn't just swing above its target value

6 0
2 years ago
Ingesting food or water contaminated with viruses, parasites, and protozoa can cause a condition characterized by painful abdomi
wlad13 [49]
This condition is known dysentery.

8 0
3 years ago
Normally the systemic arterial blood has a Po2 of ______ mm Hg, a PCo2 of ______ mm Hg, and a pH of _______.
Romashka [77]

Answer:

The correct answer is B. 95;40;7.4

Explanation:

Ranges of these values are:

PCO2: 35-45 mmHg

PO2: 80-100 mmHg

pH: 7.35-7.45

5 0
2 years ago
At which stage shown below does the frog use both skin and lungs for gas exchange
a_sh-v [17]

Frogs, like salamanders, newts and toads, are amphibians. Most amphibians begin their life cycles as water-dwelling animals, complete with gills for breathing underwater. As they grow to adulthood, amphibians normally become land-dwelling creatures, lose their gills and develop lungs for breathing. Frogs are no exception to this process and are able to breathe through their lungs once they reach adulthood.

Larval Stage

Frogs still in the larval stage, called tadpoles, are very different in outward appearance and internal physiology from their adult counterparts. Most notable is the presence of gills instead of lungs during this stage. Tadpoles can also take in oxygen through their skin, a trait that aids in gas exchange (bringing in oxygen and expelling carbon dioxide, as with lung respiration) while the tadpole is living completely underwater.

Maturation

As a frog matures from tadpole to adult, it loses its gills and develops functioning lungs. During this transition, and after maturity, frogs are still able to breathe through their skin. This trait is known as “bimodal breathing,” in which an animal uses two different systems for bringing in oxygen. These two different breathing systems allow adult frogs to shift between aquatic habitats (which require skin respiration) and land habitats (which are more suited to lung respiration) with ease.

Skin Respiration

An adult frog’s thin and permeable skin allows it to take in oxygen, even when completely submerged. Oxygen readily passes through this thin membrane-like skin, providing the frog with the oxygen it needs to stay alive under water without the need for gills. Because of the permeability of a frog’s skin, moisture is lost easily and most frogs must remain in a moist or humid environment in order to retain their water levels.

Lung Respiration

Compared with many other amphibians, frogs have relatively well-developed and complex lungs, which are subdivided and contain many alveoli—tiny sacs that are responsible for gas exchange within the lungs. Unlike mammals that control their breathing with the diaphragm, frogs use their mouths and nostrils in tandem to bring air into their lungs. When a frog breathes in, it lowers the floor of its mouth and relaxes its throat. Then it opens its nostrils to allow air to enter into the newly expanded mouth and throat, at which point the frog contracts its mouth floor and forces air into the lungs.

3 0
3 years ago
Other questions:
  • PLEASE HELLP
    8·1 answer
  • Most fungi is spread throughout the world by
    15·2 answers
  • Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. W
    15·1 answer
  • Describe a medical advance that has led to a decrease in the spread of communicable diseases. What is the advance? How does it p
    14·2 answers
  • What process releases the least ATP per molecule of glucose for immediate cell use?
    14·1 answer
  • when a honey bee stings or a pathogen attacks the body elicits a inflammatory response label the processes that happened during
    6·2 answers
  • Which statements about the cycle of weathering, erosion, and deposition are true? Check all that apply.
    15·2 answers
  • Propone dos menús, uno para ejemplificar una comida sana y equilibrada --que contenga todas estas sustancias en proporciones ade
    8·1 answer
  • Can someone help I don’t know
    9·1 answer
  • Observa con detenimiento esta onda transversal, calcula la frecuencia, periodo y
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!