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
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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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GED 102 The Human Body
11. Isotopes have different numbers of ________; thus, they also have different ________.
a. protons; atomic numbers b. neutrons; atomic masses c. electrons; atomic numbers d. protons; atomic masses e. neutrons; atomic numbers
12. A molecule of methane, CH4, is known specifically as a(n) ________.
a. compound b. radioisotope c. element d. atom e. anion
13. The subatomic particles that are responsible for the chemical behavior of atoms are the ________.
a. protons b. neutrons c. electrons d. isotopes e. ions
14. Passive processes that move substances across membranes ________.
a. utilize ATP b. employ protein pumps c. transport substances against their concentration gradients d. require no ATP e. include exocytosis and endocytosis
15. Osmosis transports water across membranes using ________.
a. ATP b. solute pumping c. aquaporins d. sodium-potassium pump e. vesicles
Challenge Examination
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GED 102 The Human Body
16. What assists the movement of substances by facilitated diffusion?
a. ATP b. protein carrier or channel c. lysosomes d. aquaporins e. solute pumps
17. What is required for diffusion to occur?
a. protein carrier or channel b. concentration gradient c. ATP d. solute pump e. ribosomes
18. Two types of endocytosis are ________.
a. cellular secretion and solute pumping b. solute pumping and active transport c. active transport and phagocytosis d. phagocytosis and pinocytosis e. pinocytosis and passive transport
19. A solution that contains fewer solutes than the cell is ________.
a. hypotonic b. hypertonic c. intravenous d. isotonic e. Ringer’s lactate
20. Jan got her microscope slides mixed up in lab as they were unlabeled. The slide with abundant adipose tissue should be labeled as the ________.
a. epidermis b. papillary layer of the dermis c. subcutaneous tissue d. reticular layer of the dermis e. stratum corneum
Challenge Examination
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GED 102 The Human Body
21. The two main layers of skin are ________.
a. papillary layer and reticular layer b. stratum basale and dermis c. epidermis and dermis d. stratum corneum and dermis e. epidermis and hypodermis
22. A needle pierces through the epidermal layers of the forearm in which of the following order?
1. stratum basale 2. stratum corneum 3. stratum granulosum 4. stratum lucidum 5. stratum spinosum
a. 2, 4, 3, 5, 1 b. 1, 5, 3, 4, 2 c. 2, 3, 5, 1, 4 d. 1, 3, 5, 2, 4 e. 2, 3, 4, 1, 5
23. Which of the following homeostatic imbalances is caused by a herpes simplex infection?
a. athlete’s foot b. cold sores c. impetigo d. contact dermatitis e. cyanosis
24. The “tanning” effect (darkening of the skin) that occurs when a person is exposed to the sun is due to ________.
a. melanin b. keratin c. oil d. Langerhans cells

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