A catalyst increases the rate of reaction by decreasing the activation
energy. The correct answer is D. Catalysts are those substances that are
used in reactions to speed up the process. An example of a catalyst
might be iron, during the manufacture of ammonia within the Haber
process.
Answer:
The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.
Explanation:
The correct answer is "Cellular respiration does not consume carbon dioxide".
Cellular respiration refers to the set of chemical reactions by which cell harnessed energy from nutrients and convert it to ATP (also called as energy currency of the cell).
It is essential for the cell as it generates ATP which is used in all the processes such as DNA replication, repair, etc.
Cellular respiration uses oxygen and releases carbon dioxide as a waste product.
Oxygen is provided by air we inhaled and carbon dioxide is released as a part of exhaled air.
The general equation of cellular respiration can be written as:
C_{6}H_{12}O_{6} + 6O_{2}C
6
H
12
O
6
+6O
2
→ 6CO_{2} + 6H_{2}O + ATP6CO
2
+6H
2
O+ATP
Answer: D
Explanation: The digestive system breaks down food into nutrients and the the respiratory use a process can respiration to true the nutrients or glucose into energy.