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chubhunter [2.5K]
3 years ago
5

____ are the small sacs that are the site of gas exchange in the lungs

Biology
1 answer:
sertanlavr [38]3 years ago
6 0

Answer:

alveoli

Explanation:

They are the smallest structures in our lungs where capillaries exchange O2 and CO2 in blood.

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The sympathetic chain of ganglia is found at the __________ levels of the spinal cord.
torisob [31]

Answer:

lateral and venteral

Explanation:

the chain extends from the upper neck down to the coccyx, forming the upward coccygeal gangilion

8 0
2 years ago
Need help with the question in the picture
NNADVOKAT [17]

Answer:

The answer is k = −11

Explanation:

f(−2)= 0

f(−2)= − 8  −  24  −  2 k  +  10  =  0

2 k = -22

and finally; k= −11

4 0
3 years ago
Which of the following is true in regards to the cell membrane?
iris [78.8K]

Answer:

It is also referred to as the phospholipid bilayer or the plasma membrane, It helps cells maintain homeostasis, It is selectively permeable; that is allows some substances through but not others

Explanation:

a. I don't know how to explain other names for the cell membrane but they are it, as the cell membrane is a bilayer composed of phopholipids and it is also called a plasma membrane

b. The cell membrane has many structures on it that facilitate nutrient transport in and out of the cell (ex: protein pump). nutrients of higher concentrations would like to move through lower concentrations, and it achieves this by moving across the cell membrane in or out of the cell, maintaining homeostasis

c. Some substances such as NaOH use pumps on the cell to move in or out of it, it can't get in or out without using pumps since they are so big, so the cell can choose when the cell wants it's nutrients or if it dosen't

7 0
3 years ago
What type of unconformity did Hutton see at Siccar Point and how was this uniformity formed?
Alex

Answer:

Hutton's Unconformity

At Siccar Point, during the lower Silurian Llandovery epoch around 435 million years ago, thin beds of fine-grained mudstone were laid down gradually deep in the Iapetus Ocean, alternating with thicker layers of hard greywacke formed when torrents swept unsorted sandstone down the continental slope. Siccar Point is a rocky promontory in the county of Berwickshire on the east coast of Scotland. It is famous in the history of geology for Hutton's Unconformity found in 1788, which James Hutton regarded as conclusive proof of his uniformitarian theory of geological development.

8 0
3 years ago
In terms of the scientific method, the purpose of an experiment is: Test a hypothesis, Develop data, Form a hypothesis, Form a c
mel-nik [20]

Answer:

Test a hypothesis

Explanation:

An experiment is done to test a hypothesis. An experiment can either prove or disprove a hypothesis. The experiment should be designed in a way that it can be repeated for validity to ensure that the results that come out of it holds true each time.

A hypothesis is made before the experiment is done. Developing data is done through interpretation of the results of an experiment. A conclusion is formed through analysis of the data obtained from an experiment.

8 0
3 years ago
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