Calcitonin, secreted from the thyroid, and parathyroid hormone. Calcitonin lowers the blood calcium levels, PTH increases it.
<span>a. haustorial roots</span>. Haustorial roots are found in parasitic plants like mistletoe and parasitic fungi. Its role is drawing nutrients by penetrating host's tissue.
1. Sensory Receptors: Detects changes of internal or external stimulus.2. Integrating center: sends signals to proper areas of the body regarding the stimulus.3. Effectors: Respond to stimulus to maintain homeostasis.
Answer:
B
types of cells, which work together cooperatively.
Explanation:
The hierarchy for an organism is (small to large):
organelles < cell < tissue < organ < organ system < organism
A tissue is made of one or more types of cells.
For A, although types of acids are in the tissue, the acids make up the cell so the acids are already included.
For C and D, organs and organ systems are larger than tissues. What something is made of must be smaller than what it is.
