Ques: Q: What is the term for the unconscious movements controlled by the somatic nervous system? Read this paragraph and choose the correct option from the provided answers: The somatic nervous system also controls some unconscious movements, called reflexes. A reflex is a very rapid motor response that is not directed by the brain. In a reflex, nerve impulses travel to and from the spinal cord in a reflex arc , like the one in Figure below . In this example, the person jerks his hand away from the flame without any conscious thought. It happens unconsciously because the nerve impulses bypass the brain. Choices: - senses - mechanisms - tremors - reflexes A:
Ans: reflexes

Ques: Q: How much distance can beta particles travel through air? Read this paragraph and choose the correct option from the provided answers: Beta particles can travel up to a meter through air. They can pass through paper and cloth but not through a sheet of aluminum. They can penetrate and damage tissues beneath the skin. Choices: - centimeters - inches - density - meter A:
Ans: meter

Ques: Q: What are the antibodies an animal produces after exposure to a microbial antigen? Read this paragraph and choose the correct option from the provided answers: Choices: - isolated - monoclonal - chimeric - polyclonal A:
Ans: polyclonal

Ques: Q: The enzyme pepsin works only in the presence of what? Read this paragraph and choose the correct option from the provided answers: The enzyme pepsin works only in the presence of acid. A strong acid is secreted into the stomach. It provides the acid that pepsin needs. You will learn about acids in the next chapter, "Chemistry of Solutions. " Vinegar and lemon juice are two common acids. Choices: - carbohydrates - sodium - oxygen - acid A:
Ans:
acid