What are two organ systems that are involved in the excretion of wastes from the body? a. digestive and urinary b. cardiovascular and skeletal c. muscular and skeletal d. endocrine and nervous e. cardiovascular and nervous.

What are two organ systems that are involved in the excretion of wastes from the body?
a. digestive and urinary b. cardiovascular and skeletal c. muscular and skeletal d. endocrine and nervous e. cardiovascular and nervous.

Multiple Choice Questions (Enter your answers on the enclosed answer sheet)
1. What is the major function of the lymphatic system?
a. return leaked fluids back to the cardiovascular system b. produce offspring c. eliminate nitrogen-containing metabolic wastes from the body d. break down food into absorbable units e. secrete hormones to regulate body processes such as growth and reproduction
2. What are two organ systems that are involved in the excretion of wastes from the body?
a. digestive and urinary b. cardiovascular and skeletal c. muscular and skeletal d. endocrine and nervous e. cardiovascular and nervous
3. Which of the following systems is matched most accurately to the life function it provides?
a. integumentary system—movement b. nervous system—excretion c. muscular system—maintaining boundaries d. nervous system—responsiveness e. respiratory system—digestion
4. Which survival need accounts for 60 to 80 percent of body weight?
a. nutrients b. oxygen c. water d. minerals e. vitamins
5. Which of the following is the correct order of elements in a control system?
a. receptor, stimulus, afferent pathway, control center, efferent pathway, effector, response b. receptor, stimulus, efferent pathway, control center, afferent pathway, effector, response c. effector, stimulus, efferent pathway, control center, afferent pathway, receptor, response d. stimulus, receptor, afferent pathway, control center, efferent pathway, effector, response e. stimulus, receptor, efferent pathway, control center, afferent pathway, effector, response
Challenge Examination
6
GED 102 The Human Body
6. Which of the following elements of a control system detects a change?
a. control center b. stimulus c. effector d. receptor e. efferent pathway
7. Positive feedback systems ________.
a. involve blood clotting and the birthing of a baby b. operate in such a way that the initial stimulus is enhanced and increases c. operate in such a way that the initial stimulus is shut off or reduced d. involve blood clotting and the birthing of a baby, and operate in such a way that the initial stimulus is enhanced and increases e. involve blood clotting and the birthing of a baby, and operate in such a way that the initial stimulus is shut off or reduced
8. An atom with 6 protons, 7 neutrons, and 6 electrons shares four pairs of electrons with four other atoms. This atom is now considered to be ________.
a. a cation b. an anion c. a neutral atom d. stable e. an ion
9. An atom has 6 protons, 8 neutrons, and 6 electrons. Its atomic mass is ________.
a. 2 b. 6 c. 8 d. 14 e. 20
10. The atomic number of an atom reveals the number of ________.
a. electrons in the atomic nucleus b. protons in the atomic nucleus c. protons plus neutrons d. protons plus electrons e. neutrons plus electrons
Challenge Examination

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