PYRAMID OF NUMBERS- shows the number of each organism at the different trophic levels (feeding levels ie. producers consumers and decomposers) in a food web.
PYRAMID OF BIOMASS- The biomass of the members of the food chain present at any one time.Pyramid of biomass indicates decrease of biomass in each tropical level from base to apex.
Answer:
a. both oxygen and carbon dioxide
b. carbon dioxide only
c. carbon dioxide only
d. oxygen only
e. carbon dioxide only
f. oxygen only
g. oxygen only
h. oxygen only
Explanation:
This question is describing the gaseous exchange of carbon dioxide and oxygen that occurs during cellular respiration. The gaseous exchange occurs via a structure called ALVEOLI OR AIR SAC.
According to this question, the following statements in the question will be matched with whether it applies to oxygen only, carbon dioxide only, or both oxygen and carbon dioxide:
a. Both oxygen and carbon dioxide are diffused through the alveoli capillaries.
b. Carbon dioxide is the waste product of cellular respiration (excreted via the lungs).
c. Carbon dioxide have the ability to form carbonates (CO3²-) and are sometimes transported in that form.
d. Oxygen from the lungs diffuse into the alveoli during inhalation.
e. Carbon dioxide from the body tissues are carried by the blood into the alveoli in order to be transported out of the body.
f. Inhalation is the taking in of air (oxygen-containing). Hence, oxygen only enters alveoli during inhalation.
g. Oxygen is the necessary substance needed by cells in order to perform cellular respiration (aerobic).
h. Haemoglobin is an iron-based protein present in the blood cells. It possess affinity for oxygen and carries oxygen in the blood.
Two characteristics that are shared by all cells are having an outer membrane and c<span>ontaining biochemicals. Biochemical refers to any chemical compound that makes up a cell. </span>
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Answer: No. You would not withdraw CSF if the needle is in the epidural space.
Explanation: There are 3 spaces that cover the spinal cord, which are epidural, subdural and subarachnoid spaces. The epidural space is the outer most space while the subarachnoid space is the inner most space. CSF flows from the brain where it is produced to the spinal cord. In the spinal cord it flows only in the subarachnoid space. Thus you would not be able to withdraw CSF if the needle is in the epidural space.
