Ques: Answer the following question given this paragraph: Positive Feedback Positive feedback intensifies a change in the body's physiological condition rather than reversing it. A deviation from the normal range results in more change, and the system moves farther away from the normal range. Positive feedback in the body is normal only when there is a definite end point. Childbirth and the body's response to blood loss are two examples of positive feedback loops that are normal but are activated only when needed. Childbirth at full term is an example of a situation in which the maintenance of the existing body state is not desired. Enormous changes in the mother's body are required to expel the baby at the end of pregnancy. And the events of childbirth, once begun, must progress rapidly to a conclusion or the life of the mother and the baby are at risk. The extreme muscular work of labor and delivery are the result of a positive feedback system (Figure 1.11). Q: What type of feedback intensifies a change in the body's physiological condition rather than reversing it? Choices: - negative feedback - neutral feedback - susceptible feedback - positive feedback A:
Ans: positive feedback

Ques: Answer the following question given this paragraph: Gravity cannot be seen. It does not require things to touch. Gravity is an invisible force. Many things are pulled to the Earth by gravity. Can you think of some things that fall toward the Earth?. Q: What is the invisible force that pulls things to earth? Choices: - motion - momentum - electromagnetism - gravity A:
Ans: gravity

Ques: Answer the following question given this paragraph: 15.5 Echinoderms and Chordates Echinoderms are deuterostome marine organisms. This phylum of animals bear a calcareous endoskeleton composed of ossicles covered by a spiny skin. Echinoderms possess a water-based circulatory system. The madreporite is the point of entry and exit for water for the water vascular system. The characteristic features of Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. Chordata contains two clades of invertebrates: Urochordata (tunicates) and Cephalochordata (lancelets), together with the. Q: What kind of system do echinoderms possess? Choices: - primitive respiratory - autonomic nerous system - photosynthetic - water-based circulatory A:
Ans: water-based circulatory

Ques: Answer the following question given this paragraph: Kidney diseases include kidney stones, infections, and kidney failure due to diabetes. Kidney failure may be treated with dialysis. Q: Which organ's diseases include kidney stones, infections, and kidney failure due to diabetes? Choices: - lungs - heart - pancreas - kidney A:
Ans:
kidney