The correct answer is option C. Endocrine glands secrete hormones into the bloodstream because endocrine glands are ductless and the exocrine glands have ducts so they secrete their hormones into the ducts.
A catalyst.
A catalyst speeds up a chemical reaction by increasing the reaction's rate. It does so by decreasing the reaction's required activation energy, which allows the products of the reaction to more easily combine. During this whole process, the catalyst does not change.
Answer:
cellular respiration can be defined as a chemical process which takes place in cell
Explanation:
This chemical process is sometime referred to as internal respiration of tissue"Respiration"for breathing.
Hence, cellular respiration can be said to mean, the oxidation of food substance in the cell.
