Chapter 33

D. Tight junctions

Digestive juices cannot leak between the epithelial cells lining the lumen because of A. Adhesion junctions B. Gap junctions C. The size of the molecules of digestive juices D. Tight junctions

A. Epithelial

Exocrine glands are classified as ____ tissue A. Epithelial B. Muscle C. Connective D. Nervous

D. Sebum secreted by sebaceous glands

If you wash your skin and hair several times a day, you will soon have dry skin that easily cracks and bleeds because the oils you have removed are necessary to keep the skin supple. This oil is A. Pili secreted by arrectors B. Salty sweat secreted by sweat glands C. Lymph secreted by lymphatic ducts D. Sebum secreted by sebaceous glands E. Sebum secreted by sweat glands

B. All of the choices apply

Neuroglia A. Engulf bacteria and debris, prooduce a glia hormone, and form myelin B. All of the choices apply C. Support and nourish neurons D. Outnumber neurons by 50 to 1 and compose more than half of the brain volume

A. All of the choices are correct

Possible indications of skin cancer are A. All of the choices are correct B. Color change of a mole C. Irregular borders of a mole D. None of the choices are correct E. Mole with asymmetrical shape

A. Epidermis

Tattoos are permanent markings on the body; therefore, they must not involve which layer of the skin? A. Epidermis B. Dermis C. Subcutaneous layer

C. Melanocytes in the dividing layer of the epidermis produce melanin, but then cells divide and half are constantly being pushed to the top to flatten and be washed off

The general process of gaining a tan and then losing it is best explained by which of the following? A. Melanocytes form melanin in the dead top epidermis and it is soon washed off B. Ultraviolet light damages the subcutaneous skin cells but these dark burned cells soon are dissolved and replaced by healing processes C. Melanocytes in the dividing layer of the epidermis produce melanin, but then cells divide and half are constantly being pushed to the top to flatten and be washed off D. Melanocytes form melanin in response to sunlight but then reabsorb it in the absence of light E. Melanocytes form melanin in response to sunlight but blood flow slowly carries it away.

B. Intercalated disks made of both desmosomes and gap junctions

The heart is made of cardiac fibers that are bound together in one interconnected mass due to A. Tight junctions B. Intercalated disks made of both desmosomes and gap junctions C. Adhesion junctions (desmosomes) D. Shared nuclei E. Gap junctions

D. The dynamic interplay between events that tend to change the internal environment and events that tend to keep it the same

The level of carbon dioxide in the blood is monitored by nerve tissue. If you exercise strenuously, the increase in cellular respiration consumes oxygen from the blood and produces surplus carbon dioxide removed in the blood. Since this physical exertion requires faster breathing to replenish oxygen supplies and carry away carbon dioxide, the carbon dioxide sensors result in signals from the brain to increase breathing rate. After you have rested, and carbon dioxide levels are back to normal, your breathing rate decreases too. This is an example of A. A positive feedback loop that stimulates a response opposite to the stimulus B. The dynamic interplay between events that tend to change the internal environment and events that tend to increase the changes C. A negative feedback loop that stimulates a response similar to the stimulus D. The dynamic interplay between events that tend to change the internal environment and events that tend to keep it the same E. A response to a sensory impulse that causes a muscle or gland to react

True

True or False Homeostasis is ultimately controlled by the nervous system.

True

True or False Spongy bone is located at the ends of long bones.

True

True or False The basement membrane is the structure that connects an epithelial tissue to an underlying connective tissue layer.

True

True or False Bone is given rigidity by its mineral components and strength from its protein fibers in the extracellular matrix.

True

True or False Keratin is a protein found in skin that prevents water loss.

False

True or False The nervous and the lymphatic systems are the two main body systems in control of body functions.

True

True or False The structure and function of an organ system are dependent on the structure and function of the lower organizational levels such as organs and tissues.

A. Abdominal cavity

Usually it is not possible to penetrate inside a body cavity to reach interstitial spaces, without cutting through some protective epidermal tissues. However, sperm reach the egg via the vagina, uterus, and fallopian tubes. Without crossing any epidermal barrier, the sperm can find itself inside which body cavity? A. Abdominal cavity B. Thoracic cavity C. Pleural cavity D. Pericardial cavity E. Dorsal body cavity (cerebral-spinal)

D. Cell, tissue, organ, organ system, organism

Which gives the correct sequence of increasing organizational complexity? A. Tissue, cell, organ system, organism, organ B. Organism, tissue, cell, organ system, organ C. Cell, organ, organ system, tissue, organism D. Cell, tissue, organ, organ system, organism E. Organ, tissue, cell, organ system, organism

C. All of these are vital functions of the skin would be compromised

Which of the following functions performed by the skin would be lost or seriously compromised if someone suffered a severe burn over most of the body? A. Prevention of heat and water loss B. Conversion, in the presence of ultraviolet light, of precursor molecules to vitamin D. C. All of these are vital functions of the skin would be compromised D. Prevention of massive and continuous infection from invasion by external bacteria, viruses, and parasites E. Production of sweat that evaporates and cools the body when it is overheating

B. All striated mucsle is under voluntary control

Which of the following statements about muscular tissue is NOT true? A. Smooth muscle lacks striations B. All striated mucsle is under voluntary control C. Skeletal muscle fibers are extremely large cells with multiple nuclei D. Skeletal muscle fibers form as multiple precursor cells join to produce a single cell. E. Striated muscle has bands of actin and myosin filaments perpedicular to the length of the cell.

A. Columnar epithelial is cube-shaped with the nucleus near the upper surface of the cells

Which of the following statements is NOT true about epithelial tissue? A. Columnar epithelial is cube-shaped with the nucleus near the upper surface of the cells B. Pseudostraitified epithelium looks like it has multiple layers, but all the cells are attached to the same base C. Simple epithelium has a single layer of cells in the tissue D. Flattened cells are found in squamous epithelium E. Epithelium lining the respiratory tract contains cilia that move particles along its surface

A. Cardiac Muscle

Which of the following tissues is striated, contains cells with one nucleus each, and is not under voluntary control? A. Cardiac muscle B. Skeletal muscle C. Nervous tissue D. Smooth muscle

D. Collagen fibers

Which of the following types of fibers accounts for the strength of various connective tissues? A. Actin fibers B. Elastic fibers C. Reticular fibers D. Collagen fibers

C. The fluid matrix, plasma, is made by the cells in the bloodstream

Which statement about blood is NOT true? A. White blood cells, Leukocytes, are involved in the body's defense against infection B. Platelets are not complete cells C. The fluid matrix, plasma, is made by the cells in the bloodstream D. Red blood cells, Erthrocytes, carry oxygen E. Platelets are involved in blood clotting

D. Fibrous connective tissue includes bone and cartilage

Which statement about connective tissue is NOT true? A. Blood is a connective tissue that contains a fluid matrix B. Loose connective tissue contains fibroblasts, different kinds of fibers, and a nonliving matrix C. Adipose tissue provides insulation and padding, as in the skin D. Fibrous connective tissue includes bone and cartilage.

C. The dendrites carry electrical impulses away from the cell body of the neuron

Which statement is NOT true about nervous tissue? A. Nerve fibers are long axons covered be a myelin sheath. B. Cells in the nervous system that conduct electrical impulses are called neurons C. The dendrites carry electrical impulses away from the cell body of the neuron D. Neuroglia support and protect neurons E. Neuroglia may provide neurons with nutrients or keep them free of cellular debris

D. Subcutaneous tissue

Which structure is NOT a part of the skin? A. Connective tissue B. Dermis C. Stratified squamous epithelium D. Subcutaneous tissue E. Melanocytes

A. Connective tissue

Which tissue includes bone and cartilage? A. Connective tissue B. Nervous tissue C. Muscle tissue D. Epithelial tissue

C. Epithelial tissue

Which tissue includes the epidermis? A. Muscle tissue B. Nervous tissue C. Epithelial tissue D. Connective tissue

A. Smooth

Which type of muscle tissue is found in the viscera of internal organs? A. Smooth B. Skeletal C. Striated D. Cardiac

B. Nervous tissue

Which type of tissue is reponsible for receiving, interpreting, and producing a reponse to stimuli? A. Connective tissue B. Nervous tissue C. Muscle tissue D. Epithelial tissue

B. Muscle Tissue

Which type of tissue is responable for contractions that allow movements of organs or the entire body? A. Connective tissue B. Muscle tissue C. Epithelial tissue D. Nervous tissue

D. Epithelial tissue

Which type of tissue lines body cavities and covers body surfaces? A. Muscle tissue B. Nervous tissue C. Connective tissue D. Epithelial tissue