Answer the following question given this paragraph: Gravity is traditionally defined as a force of attraction between two masses. Weight measures the force of gravity and is expressed in newtons (N). Q: What is the force of attraction between two masses? Choices: - electricity - inertia - momentum - gravity A:
gravity
(Question)
Answer the following question given this paragraph: As pictured below ( Figure below ), some grazing animals, especially sheep and goats, eat grass right down to the roots. They may even pull the grass entirely out of the ground. Grazing animals can kill the grass. They may thin it out so much that it offers little protection to the soil. If animals are kept in the same place too long, the soil may become completely bare. The bare soil is easily eroded by wind and water. Q: By pulling out grass by its roots and over-grazing, livestock contribute to what negative process? Choices: - migration - evolution - immigration - erosion A:
(Answer)
erosion
Ques: Answer the following question given this paragraph: The stomach is a sac-like organ at the end of the esophagus. It has thick muscular walls that contract and relax to squeeze and mix food. This helps break the food into smaller pieces. It also helps mix the food with enzymes and other secretions in the stomach. For example, the stomach secretes the enzyme pepsin, which helps digest proteins. Q: What is a sac-like organ at the end of the esophagus? Choices: - appendix - larynx - spleen - the stomach A:
Ans: the stomach
(Q).
Answer the following question given this paragraph: Gamma rays are the most dangerous type of radiation. They can travel farther and penetrate materials more deeply than can the charged particles emitted during alpha and beta decay. Gamma rays can be stopped only by several centimeters of lead or several meters of concrete. It's no surprise that they can penetrate and damage cells deep inside the body. You can learn more about the effects of gamma radiation on people at this URL: http://library. thinkquest. org/3471/radiation_effects_body. html . Q: What is the most dangerous type of radiation? Choices: - sunlight rays - beta rays - plasma rays - gamma rays A:
(A).
gamma rays
Ques:Answer the following question given this paragraph: 14.1 | Sensory Perception By the end of this section, you will be able to: Describe different types of sensory receptors Describe the structures responsible for the special senses of taste, smell, hearing, balance, and vision Distinguish how different tastes are transduced Describe the means of mechanoreception for hearing and balance List the supporting structures around the eye and describe the structure of the eyeball Describe the processes of phototransduction A major role of sensory receptors is to help us learn about the environment around us, or about the state of our internal environment. Stimuli from varying sources, and of different types, are received and changed into the electrochemical signals of the nervous system. This occurs when a stimulus changes the cell membrane potential of a sensory neuron. The stimulus causes the sensory cell to produce an action potential that is relayed into the central nervous system (CNS), where it is integrated with other sensory informationor sometimes higher cognitive functionsto become a conscious perception of that stimulus. The central integration may then lead to a motor response. Describing sensory function with the term sensation or perception is a deliberate distinction. Sensation is the activation of sensory receptor cells at the level of the stimulus. Perception is the central processing of sensory stimuli into a meaningful pattern. Perception is dependent on sensation, but not all sensations are perceived. Receptors are the cells or structures that detect sensations. A receptor cell is changed directly by a stimulus. A transmembrane protein receptor is a protein in the cell membrane that mediates a physiological change in a neuron, most often through the opening of ion channels or changes in the cell signaling processes. Transmembrane receptors are activated by chemicals called ligands. For example, a molecule in food can serve as a ligand for taste receptors. Other transmembrane proteins, which are not accurately called receptors, are... Q: What are the cells or structures that detect sensations? Choices: - hormones - membranes - proteins - receptors A:

Ans:receptors
Answer the following question given this paragraph: The liver breaks down excess amino acids and toxins in the blood. Q: Which organ breaks down amino acids and toxins that are in the blood? Choices: - skin - kidney - small intestine - liver A:
liver